Homogenized halides and alkali cation segregation in alloyed organic-inorganic perovskites

The role of the alkali metal cations in halide perovskite solar cells is not well understood. Using synchrotron-based nano-x-ray fluorescence and complementary measurements, we found that the halide distribution becomes homogenized upon addition of cesium iodide, either alone or with rubidium iodide...

Full description

Saved in:
Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2019-02, Vol.363 (6427), p.627-631
Main Authors: Correa-Baena, Juan-Pablo, Luo, Yanqi, Brenner, Thomas M, Snaider, Jordan, Sun, Shijing, Li, Xueying, Jensen, Mallory A, Hartono, Noor Titan Putri, Nienhaus, Lea, Wieghold, Sarah, Poindexter, Jeremy R, Wang, Shen, Meng, Ying Shirley, Wang, Ti, Lai, Barry, Holt, Martin V, Cai, Zhonghou, Bawendi, Moungi G, Huang, Libai, Buonassisi, Tonio, Fenning, David P
Format: Article
Language:English
Subjects:
Alkali metal alloys
Alkali metals
Alkalies
Alkalis
Anions
Cations
Cesium
Cesium iodides
Clusters
Current carriers
Energy conversion efficiency
Fluorescence
Halides
Heavy metals
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Iodides
Low concentrations
Metal concentrations
Metal ions
Microscopy
Perovskites
Photovoltaic cells
Photovoltaics
Potassium
Recombination
Rubidium
Solar cells
X ray imagery
X-ray fluorescence
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
cited_by cdi_FETCH-LOGICAL-c459t-8a53bbf46af2c2c797d79f0f814e31b36e70efa4d492753dc47124d8015b3ca3
cites cdi_FETCH-LOGICAL-c459t-8a53bbf46af2c2c797d79f0f814e31b36e70efa4d492753dc47124d8015b3ca3
container_end_page 631
container_issue 6427
container_start_page 627
container_title Science (American Association for the Advancement of Science)
container_volume 363
creator Correa-Baena, Juan-Pablo
Luo, Yanqi
Brenner, Thomas M
Snaider, Jordan
Sun, Shijing
Li, Xueying
Jensen, Mallory A
Hartono, Noor Titan Putri
Nienhaus, Lea
Wieghold, Sarah
Poindexter, Jeremy R
Wang, Shen
Meng, Ying Shirley
Wang, Ti
Lai, Barry
Holt, Martin V
Cai, Zhonghou
Bawendi, Moungi G
Huang, Libai
Buonassisi, Tonio
Fenning, David P
description The role of the alkali metal cations in halide perovskite solar cells is not well understood. Using synchrotron-based nano-x-ray fluorescence and complementary measurements, we found that the halide distribution becomes homogenized upon addition of cesium iodide, either alone or with rubidium iodide, for substoichiometric, stoichiometric, and overstoichiometric preparations, where the lead halide is varied with respect to organic halide precursors. Halide homogenization coincides with long-lived charge carrier decays, spatially homogeneous carrier dynamics (as visualized by ultrafast microscopy), and improved photovoltaic device performance. We found that rubidium and potassium phase-segregate in highly concentrated clusters. Alkali metals are beneficial at low concentrations, where they homogenize the halide distribution, but at higher concentrations, they form recombination-active second-phase clusters.
doi_str_mv 10.1126/science.aah5065
format article
fullrecord <record><control><sourceid>proquest_osti_</sourceid><recordid>TN_cdi_osti_scitechconnect_1493911</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2177203137</sourcerecordid><originalsourceid>FETCH-LOGICAL-c459t-8a53bbf46af2c2c797d79f0f814e31b36e70efa4d492753dc47124d8015b3ca3</originalsourceid><addsrcrecordid>eNpdkb1PwzAQxS0EglKY2VAEC0uKnXPieESIL6kSSycWy3EurSG1i50iwV-PUQMD093p_d5Jd4-QM0ZnjBXVdTQWncGZ1quSVuUemTAqy1wWFPbJhFKo8pqK8ogcx_hKadIkHJIjoAKAMzEhL49-7Zfo7Be22Ur3tsWYaddmun9LU2b0YL3LIi4DLne9dUns_Wcy-LDUzprcurHLNhj8R3yzA8YTctDpPuLpWKdkcX-3uH3M588PT7c389zwUg55rUtomo5XuitMYYQUrZAd7WrGEVgDFQqKneYtl4UooTVcsIK3NWVlA0bDlFzs1vo4WJUeMqBZGe8cmkExLkEylqCrHbQJ_n2LcVBrGw32vXbot1EVrIaKQ1HVCb38h776bXDpgkQJkT7LQCTqekeZ4GMM2KlNsGsdPhWj6icaNUajxmiS43zcu23W2P7xv1nAN-dkjEU</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2177203137</pqid></control><display><type>article</type><title>Homogenized halides and alkali cation segregation in alloyed organic-inorganic perovskites</title><source>American Association for the Advancement of Science</source><source>Alma/SFX Local Collection</source><creator>Correa-Baena, Juan-Pablo ; Luo, Yanqi ; Brenner, Thomas M ; Snaider, Jordan ; Sun, Shijing ; Li, Xueying ; Jensen, Mallory A ; Hartono, Noor Titan Putri ; Nienhaus, Lea ; Wieghold, Sarah ; Poindexter, Jeremy R ; Wang, Shen ; Meng, Ying Shirley ; Wang, Ti ; Lai, Barry ; Holt, Martin V ; Cai, Zhonghou ; Bawendi, Moungi G ; Huang, Libai ; Buonassisi, Tonio ; Fenning, David P</creator><creatorcontrib>Correa-Baena, Juan-Pablo ; Luo, Yanqi ; Brenner, Thomas M ; Snaider, Jordan ; Sun, Shijing ; Li, Xueying ; Jensen, Mallory A ; Hartono, Noor Titan Putri ; Nienhaus, Lea ; Wieghold, Sarah ; Poindexter, Jeremy R ; Wang, Shen ; Meng, Ying Shirley ; Wang, Ti ; Lai, Barry ; Holt, Martin V ; Cai, Zhonghou ; Bawendi, Moungi G ; Huang, Libai ; Buonassisi, Tonio ; Fenning, David P ; Univ. of California, San Diego, CA (United States) ; Argonne National Lab. (ANL), Argonne, IL (United States) ; Purdue Univ., West Lafayette, IN (United States) ; Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)</creatorcontrib><description>The role of the alkali metal cations in halide perovskite solar cells is not well understood. Using synchrotron-based nano-x-ray fluorescence and complementary measurements, we found that the halide distribution becomes homogenized upon addition of cesium iodide, either alone or with rubidium iodide, for substoichiometric, stoichiometric, and overstoichiometric preparations, where the lead halide is varied with respect to organic halide precursors. Halide homogenization coincides with long-lived charge carrier decays, spatially homogeneous carrier dynamics (as visualized by ultrafast microscopy), and improved photovoltaic device performance. We found that rubidium and potassium phase-segregate in highly concentrated clusters. Alkali metals are beneficial at low concentrations, where they homogenize the halide distribution, but at higher concentrations, they form recombination-active second-phase clusters.</description><identifier>ISSN: 0036-8075</identifier><identifier>EISSN: 1095-9203</identifier><identifier>DOI: 10.1126/science.aah5065</identifier><identifier>PMID: 30733417</identifier><language>eng</language><publisher>United States: The American Association for the Advancement of Science</publisher><subject>Alkali metal alloys ; Alkali metals ; Alkalies ; Alkalis ; Anions ; Cations ; Cesium ; Cesium iodides ; Clusters ; Current carriers ; Energy conversion efficiency ; Fluorescence ; Halides ; Heavy metals ; INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY ; Iodides ; Low concentrations ; Metal concentrations ; Metal ions ; Microscopy ; Perovskites ; Photovoltaic cells ; Photovoltaics ; Potassium ; Recombination ; Rubidium ; Solar cells ; X ray imagery ; X-ray fluorescence</subject><ispartof>Science (American Association for the Advancement of Science), 2019-02, Vol.363 (6427), p.627-631</ispartof><rights>Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.</rights><rights>Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c459t-8a53bbf46af2c2c797d79f0f814e31b36e70efa4d492753dc47124d8015b3ca3</citedby><cites>FETCH-LOGICAL-c459t-8a53bbf46af2c2c797d79f0f814e31b36e70efa4d492753dc47124d8015b3ca3</cites><orcidid>0000-0001-8345-4937 ; 0000-0002-3860-1149 ; 0000-0003-2220-4365 ; 0000-0003-3826-4397 ; 0000-0002-6061-7155 ; 0000-0001-5624-9583 ; 0000-0003-1412-412X ; 0000-0001-6169-3961 ; 0000-0001-9975-3624 ; 0000-0002-0748-0620 ; 0000-0001-8936-8845 ; 0000-0002-6828-7277 ; 0000-0002-4609-9312 ; 0000-0002-8754-6270 ; 0000-0002-5353-0780 ; 0000-0002-1135-6112 ; 0000-0002-6616-9867 ; 0000000322204365 ; 0000000238601149 ; 0000000211356112 ; 0000000199753624 ; 0000000338264397 ; 0000000268287277 ; 0000000246099312 ; 0000000266169867 ; 0000000207480620 ; 000000031412412X ; 0000000260617155 ; 0000000183454937 ; 0000000156249583 ; 0000000253530780 ; 0000000161693961 ; 0000000189368845 ; 0000000287546270</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,2884,2885,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/30733417$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/1493911$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Correa-Baena, Juan-Pablo</creatorcontrib><creatorcontrib>Luo, Yanqi</creatorcontrib><creatorcontrib>Brenner, Thomas M</creatorcontrib><creatorcontrib>Snaider, Jordan</creatorcontrib><creatorcontrib>Sun, Shijing</creatorcontrib><creatorcontrib>Li, Xueying</creatorcontrib><creatorcontrib>Jensen, Mallory A</creatorcontrib><creatorcontrib>Hartono, Noor Titan Putri</creatorcontrib><creatorcontrib>Nienhaus, Lea</creatorcontrib><creatorcontrib>Wieghold, Sarah</creatorcontrib><creatorcontrib>Poindexter, Jeremy R</creatorcontrib><creatorcontrib>Wang, Shen</creatorcontrib><creatorcontrib>Meng, Ying Shirley</creatorcontrib><creatorcontrib>Wang, Ti</creatorcontrib><creatorcontrib>Lai, Barry</creatorcontrib><creatorcontrib>Holt, Martin V</creatorcontrib><creatorcontrib>Cai, Zhonghou</creatorcontrib><creatorcontrib>Bawendi, Moungi G</creatorcontrib><creatorcontrib>Huang, Libai</creatorcontrib><creatorcontrib>Buonassisi, Tonio</creatorcontrib><creatorcontrib>Fenning, David P</creatorcontrib><creatorcontrib>Univ. of California, San Diego, CA (United States)</creatorcontrib><creatorcontrib>Argonne National Lab. (ANL), Argonne, IL (United States)</creatorcontrib><creatorcontrib>Purdue Univ., West Lafayette, IN (United States)</creatorcontrib><creatorcontrib>Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)</creatorcontrib><title>Homogenized halides and alkali cation segregation in alloyed organic-inorganic perovskites</title><title>Science (American Association for the Advancement of Science)</title><addtitle>Science</addtitle><description>The role of the alkali metal cations in halide perovskite solar cells is not well understood. Using synchrotron-based nano-x-ray fluorescence and complementary measurements, we found that the halide distribution becomes homogenized upon addition of cesium iodide, either alone or with rubidium iodide, for substoichiometric, stoichiometric, and overstoichiometric preparations, where the lead halide is varied with respect to organic halide precursors. Halide homogenization coincides with long-lived charge carrier decays, spatially homogeneous carrier dynamics (as visualized by ultrafast microscopy), and improved photovoltaic device performance. We found that rubidium and potassium phase-segregate in highly concentrated clusters. Alkali metals are beneficial at low concentrations, where they homogenize the halide distribution, but at higher concentrations, they form recombination-active second-phase clusters.</description><subject>Alkali metal alloys</subject><subject>Alkali metals</subject><subject>Alkalies</subject><subject>Alkalis</subject><subject>Anions</subject><subject>Cations</subject><subject>Cesium</subject><subject>Cesium iodides</subject><subject>Clusters</subject><subject>Current carriers</subject><subject>Energy conversion efficiency</subject><subject>Fluorescence</subject><subject>Halides</subject><subject>Heavy metals</subject><subject>INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY</subject><subject>Iodides</subject><subject>Low concentrations</subject><subject>Metal concentrations</subject><subject>Metal ions</subject><subject>Microscopy</subject><subject>Perovskites</subject><subject>Photovoltaic cells</subject><subject>Photovoltaics</subject><subject>Potassium</subject><subject>Recombination</subject><subject>Rubidium</subject><subject>Solar cells</subject><subject>X ray imagery</subject><subject>X-ray fluorescence</subject><issn>0036-8075</issn><issn>1095-9203</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNpdkb1PwzAQxS0EglKY2VAEC0uKnXPieESIL6kSSycWy3EurSG1i50iwV-PUQMD093p_d5Jd4-QM0ZnjBXVdTQWncGZ1quSVuUemTAqy1wWFPbJhFKo8pqK8ogcx_hKadIkHJIjoAKAMzEhL49-7Zfo7Be22Ur3tsWYaddmun9LU2b0YL3LIi4DLne9dUns_Wcy-LDUzprcurHLNhj8R3yzA8YTctDpPuLpWKdkcX-3uH3M588PT7c389zwUg55rUtomo5XuitMYYQUrZAd7WrGEVgDFQqKneYtl4UooTVcsIK3NWVlA0bDlFzs1vo4WJUeMqBZGe8cmkExLkEylqCrHbQJ_n2LcVBrGw32vXbot1EVrIaKQ1HVCb38h776bXDpgkQJkT7LQCTqekeZ4GMM2KlNsGsdPhWj6icaNUajxmiS43zcu23W2P7xv1nAN-dkjEU</recordid><startdate>20190208</startdate><enddate>20190208</enddate><creator>Correa-Baena, Juan-Pablo</creator><creator>Luo, Yanqi</creator><creator>Brenner, Thomas M</creator><creator>Snaider, Jordan</creator><creator>Sun, Shijing</creator><creator>Li, Xueying</creator><creator>Jensen, Mallory A</creator><creator>Hartono, Noor Titan Putri</creator><creator>Nienhaus, Lea</creator><creator>Wieghold, Sarah</creator><creator>Poindexter, Jeremy R</creator><creator>Wang, Shen</creator><creator>Meng, Ying Shirley</creator><creator>Wang, Ti</creator><creator>Lai, Barry</creator><creator>Holt, Martin V</creator><creator>Cai, Zhonghou</creator><creator>Bawendi, Moungi G</creator><creator>Huang, Libai</creator><creator>Buonassisi, Tonio</creator><creator>Fenning, David P</creator><general>The American Association for the Advancement of Science</general><general>AAAS</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QF</scope><scope>7QG</scope><scope>7QL</scope><scope>7QP</scope><scope>7QQ</scope><scope>7QR</scope><scope>7SC</scope><scope>7SE</scope><scope>7SN</scope><scope>7SP</scope><scope>7SR</scope><scope>7SS</scope><scope>7T7</scope><scope>7TA</scope><scope>7TB</scope><scope>7TK</scope><scope>7TM</scope><scope>7U5</scope><scope>7U9</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>F28</scope><scope>FR3</scope><scope>H8D</scope><scope>H8G</scope><scope>H94</scope><scope>JG9</scope><scope>JQ2</scope><scope>K9.</scope><scope>KR7</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope><scope>M7N</scope><scope>P64</scope><scope>RC3</scope><scope>7X8</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0001-8345-4937</orcidid><orcidid>https://orcid.org/0000-0002-3860-1149</orcidid><orcidid>https://orcid.org/0000-0003-2220-4365</orcidid><orcidid>https://orcid.org/0000-0003-3826-4397</orcidid><orcidid>https://orcid.org/0000-0002-6061-7155</orcidid><orcidid>https://orcid.org/0000-0001-5624-9583</orcidid><orcidid>https://orcid.org/0000-0003-1412-412X</orcidid><orcidid>https://orcid.org/0000-0001-6169-3961</orcidid><orcidid>https://orcid.org/0000-0001-9975-3624</orcidid><orcidid>https://orcid.org/0000-0002-0748-0620</orcidid><orcidid>https://orcid.org/0000-0001-8936-8845</orcidid><orcidid>https://orcid.org/0000-0002-6828-7277</orcidid><orcidid>https://orcid.org/0000-0002-4609-9312</orcidid><orcidid>https://orcid.org/0000-0002-8754-6270</orcidid><orcidid>https://orcid.org/0000-0002-5353-0780</orcidid><orcidid>https://orcid.org/0000-0002-1135-6112</orcidid><orcidid>https://orcid.org/0000-0002-6616-9867</orcidid><orcidid>https://orcid.org/0000000322204365</orcidid><orcidid>https://orcid.org/0000000238601149</orcidid><orcidid>https://orcid.org/0000000211356112</orcidid><orcidid>https://orcid.org/0000000199753624</orcidid><orcidid>https://orcid.org/0000000338264397</orcidid><orcidid>https://orcid.org/0000000268287277</orcidid><orcidid>https://orcid.org/0000000246099312</orcidid><orcidid>https://orcid.org/0000000266169867</orcidid><orcidid>https://orcid.org/0000000207480620</orcidid><orcidid>https://orcid.org/000000031412412X</orcidid><orcidid>https://orcid.org/0000000260617155</orcidid><orcidid>https://orcid.org/0000000183454937</orcidid><orcidid>https://orcid.org/0000000156249583</orcidid><orcidid>https://orcid.org/0000000253530780</orcidid><orcidid>https://orcid.org/0000000161693961</orcidid><orcidid>https://orcid.org/0000000189368845</orcidid><orcidid>https://orcid.org/0000000287546270</orcidid></search><sort><creationdate>20190208</creationdate><title>Homogenized halides and alkali cation segregation in alloyed organic-inorganic perovskites</title><author>Correa-Baena, Juan-Pablo ; Luo, Yanqi ; Brenner, Thomas M ; Snaider, Jordan ; Sun, Shijing ; Li, Xueying ; Jensen, Mallory A ; Hartono, Noor Titan Putri ; Nienhaus, Lea ; Wieghold, Sarah ; Poindexter, Jeremy R ; Wang, Shen ; Meng, Ying Shirley ; Wang, Ti ; Lai, Barry ; Holt, Martin V ; Cai, Zhonghou ; Bawendi, Moungi G ; Huang, Libai ; Buonassisi, Tonio ; Fenning, David P</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c459t-8a53bbf46af2c2c797d79f0f814e31b36e70efa4d492753dc47124d8015b3ca3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Alkali metal alloys</topic><topic>Alkali metals</topic><topic>Alkalies</topic><topic>Alkalis</topic><topic>Anions</topic><topic>Cations</topic><topic>Cesium</topic><topic>Cesium iodides</topic><topic>Clusters</topic><topic>Current carriers</topic><topic>Energy conversion efficiency</topic><topic>Fluorescence</topic><topic>Halides</topic><topic>Heavy metals</topic><topic>INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY</topic><topic>Iodides</topic><topic>Low concentrations</topic><topic>Metal concentrations</topic><topic>Metal ions</topic><topic>Microscopy</topic><topic>Perovskites</topic><topic>Photovoltaic cells</topic><topic>Photovoltaics</topic><topic>Potassium</topic><topic>Recombination</topic><topic>Rubidium</topic><topic>Solar cells</topic><topic>X ray imagery</topic><topic>X-ray fluorescence</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Correa-Baena, Juan-Pablo</creatorcontrib><creatorcontrib>Luo, Yanqi</creatorcontrib><creatorcontrib>Brenner, Thomas M</creatorcontrib><creatorcontrib>Snaider, Jordan</creatorcontrib><creatorcontrib>Sun, Shijing</creatorcontrib><creatorcontrib>Li, Xueying</creatorcontrib><creatorcontrib>Jensen, Mallory A</creatorcontrib><creatorcontrib>Hartono, Noor Titan Putri</creatorcontrib><creatorcontrib>Nienhaus, Lea</creatorcontrib><creatorcontrib>Wieghold, Sarah</creatorcontrib><creatorcontrib>Poindexter, Jeremy R</creatorcontrib><creatorcontrib>Wang, Shen</creatorcontrib><creatorcontrib>Meng, Ying Shirley</creatorcontrib><creatorcontrib>Wang, Ti</creatorcontrib><creatorcontrib>Lai, Barry</creatorcontrib><creatorcontrib>Holt, Martin V</creatorcontrib><creatorcontrib>Cai, Zhonghou</creatorcontrib><creatorcontrib>Bawendi, Moungi G</creatorcontrib><creatorcontrib>Huang, Libai</creatorcontrib><creatorcontrib>Buonassisi, Tonio</creatorcontrib><creatorcontrib>Fenning, David P</creatorcontrib><creatorcontrib>Univ. of California, San Diego, CA (United States)</creatorcontrib><creatorcontrib>Argonne National Lab. (ANL), Argonne, IL (United States)</creatorcontrib><creatorcontrib>Purdue Univ., West Lafayette, IN (United States)</creatorcontrib><creatorcontrib>Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Aluminium Industry Abstracts</collection><collection>Animal Behavior Abstracts</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Calcium &amp; Calcified Tissue Abstracts</collection><collection>Ceramic Abstracts</collection><collection>Chemoreception Abstracts</collection><collection>Computer and Information Systems Abstracts</collection><collection>Corrosion Abstracts</collection><collection>Ecology Abstracts</collection><collection>Electronics &amp; Communications Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Entomology Abstracts (Full archive)</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Materials Business File</collection><collection>Mechanical &amp; Transportation Engineering Abstracts</collection><collection>Neurosciences Abstracts</collection><collection>Nucleic Acids Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Virology and AIDS Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ANTE: Abstracts in New Technology &amp; Engineering</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Copper Technical Reference Library</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>Materials Research Database</collection><collection>ProQuest Computer Science Collection</collection><collection>ProQuest Health &amp; Medical Complete (Alumni)</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Computer and Information Systems Abstracts – Academic</collection><collection>Computer and Information Systems Abstracts Professional</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Genetics Abstracts</collection><collection>MEDLINE - Academic</collection><collection>OSTI.GOV</collection><jtitle>Science (American Association for the Advancement of Science)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Correa-Baena, Juan-Pablo</au><au>Luo, Yanqi</au><au>Brenner, Thomas M</au><au>Snaider, Jordan</au><au>Sun, Shijing</au><au>Li, Xueying</au><au>Jensen, Mallory A</au><au>Hartono, Noor Titan Putri</au><au>Nienhaus, Lea</au><au>Wieghold, Sarah</au><au>Poindexter, Jeremy R</au><au>Wang, Shen</au><au>Meng, Ying Shirley</au><au>Wang, Ti</au><au>Lai, Barry</au><au>Holt, Martin V</au><au>Cai, Zhonghou</au><au>Bawendi, Moungi G</au><au>Huang, Libai</au><au>Buonassisi, Tonio</au><au>Fenning, David P</au><aucorp>Univ. of California, San Diego, CA (United States)</aucorp><aucorp>Argonne National Lab. (ANL), Argonne, IL (United States)</aucorp><aucorp>Purdue Univ., West Lafayette, IN (United States)</aucorp><aucorp>Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Homogenized halides and alkali cation segregation in alloyed organic-inorganic perovskites</atitle><jtitle>Science (American Association for the Advancement of Science)</jtitle><addtitle>Science</addtitle><date>2019-02-08</date><risdate>2019</risdate><volume>363</volume><issue>6427</issue><spage>627</spage><epage>631</epage><pages>627-631</pages><issn>0036-8075</issn><eissn>1095-9203</eissn><abstract>The role of the alkali metal cations in halide perovskite solar cells is not well understood. Using synchrotron-based nano-x-ray fluorescence and complementary measurements, we found that the halide distribution becomes homogenized upon addition of cesium iodide, either alone or with rubidium iodide, for substoichiometric, stoichiometric, and overstoichiometric preparations, where the lead halide is varied with respect to organic halide precursors. Halide homogenization coincides with long-lived charge carrier decays, spatially homogeneous carrier dynamics (as visualized by ultrafast microscopy), and improved photovoltaic device performance. We found that rubidium and potassium phase-segregate in highly concentrated clusters. Alkali metals are beneficial at low concentrations, where they homogenize the halide distribution, but at higher concentrations, they form recombination-active second-phase clusters.</abstract><cop>United States</cop><pub>The American Association for the Advancement of Science</pub><pmid>30733417</pmid><doi>10.1126/science.aah5065</doi><tpages>5</tpages><orcidid>https://orcid.org/0000-0001-8345-4937</orcidid><orcidid>https://orcid.org/0000-0002-3860-1149</orcidid><orcidid>https://orcid.org/0000-0003-2220-4365</orcidid><orcidid>https://orcid.org/0000-0003-3826-4397</orcidid><orcidid>https://orcid.org/0000-0002-6061-7155</orcidid><orcidid>https://orcid.org/0000-0001-5624-9583</orcidid><orcidid>https://orcid.org/0000-0003-1412-412X</orcidid><orcidid>https://orcid.org/0000-0001-6169-3961</orcidid><orcidid>https://orcid.org/0000-0001-9975-3624</orcidid><orcidid>https://orcid.org/0000-0002-0748-0620</orcidid><orcidid>https://orcid.org/0000-0001-8936-8845</orcidid><orcidid>https://orcid.org/0000-0002-6828-7277</orcidid><orcidid>https://orcid.org/0000-0002-4609-9312</orcidid><orcidid>https://orcid.org/0000-0002-8754-6270</orcidid><orcidid>https://orcid.org/0000-0002-5353-0780</orcidid><orcidid>https://orcid.org/0000-0002-1135-6112</orcidid><orcidid>https://orcid.org/0000-0002-6616-9867</orcidid><orcidid>https://orcid.org/0000000322204365</orcidid><orcidid>https://orcid.org/0000000238601149</orcidid><orcidid>https://orcid.org/0000000211356112</orcidid><orcidid>https://orcid.org/0000000199753624</orcidid><orcidid>https://orcid.org/0000000338264397</orcidid><orcidid>https://orcid.org/0000000268287277</orcidid><orcidid>https://orcid.org/0000000246099312</orcidid><orcidid>https://orcid.org/0000000266169867</orcidid><orcidid>https://orcid.org/0000000207480620</orcidid><orcidid>https://orcid.org/000000031412412X</orcidid><orcidid>https://orcid.org/0000000260617155</orcidid><orcidid>https://orcid.org/0000000183454937</orcidid><orcidid>https://orcid.org/0000000156249583</orcidid><orcidid>https://orcid.org/0000000253530780</orcidid><orcidid>https://orcid.org/0000000161693961</orcidid><orcidid>https://orcid.org/0000000189368845</orcidid><orcidid>https://orcid.org/0000000287546270</orcidid><oa>free_for_read</oa></addata></record>
fulltext fulltext
identifier ISSN: 0036-8075
ispartof Science (American Association for the Advancement of Science), 2019-02, Vol.363 (6427), p.627-631
issn 0036-8075
1095-9203
language eng
recordid cdi_osti_scitechconnect_1493911
source American Association for the Advancement of Science; Alma/SFX Local Collection
subjects Alkali metal alloys
Alkali metals
Alkalies
Alkalis
Anions
Cations
Cesium
Cesium iodides
Clusters
Current carriers
Energy conversion efficiency
Fluorescence
Halides
Heavy metals
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Iodides
Low concentrations
Metal concentrations
Metal ions
Microscopy
Perovskites
Photovoltaic cells
Photovoltaics
Potassium
Recombination
Rubidium
Solar cells
X ray imagery
X-ray fluorescence
title Homogenized halides and alkali cation segregation in alloyed organic-inorganic perovskites
url http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-03T10%3A42%3A54IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_osti_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Homogenized%20halides%20and%20alkali%20cation%20segregation%20in%20alloyed%20organic-inorganic%20perovskites&rft.jtitle=Science%20(American%20Association%20for%20the%20Advancement%20of%20Science)&rft.au=Correa-Baena,%20Juan-Pablo&rft.aucorp=Univ.%20of%20California,%20San%20Diego,%20CA%20(United%20States)&rft.date=2019-02-08&rft.volume=363&rft.issue=6427&rft.spage=627&rft.epage=631&rft.pages=627-631&rft.issn=0036-8075&rft.eissn=1095-9203&rft_id=info:doi/10.1126/science.aah5065&rft_dat=%3Cproquest_osti_%3E2177203137%3C/proquest_osti_%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c459t-8a53bbf46af2c2c797d79f0f814e31b36e70efa4d492753dc47124d8015b3ca3%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_pqid=2177203137&rft_id=info:pmid/30733417&rfr_iscdi=true