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Mesoscopic perovskite solar cells with an admixture of nanocrystalline TiO and AlO: role of interconnectivity of TiO in charge collection
Perovskite solar cells with high power conversion efficiency usually employ mesoporous TiO 2 , however the role of the TiO 2 layer has not been clearly resolved. Here we prepared MAPbI 3 (MA = CH 3 NH 3 ) perovskite solar cells with an admixture of nanocrystalline TiO 2 and Al 2 O 3 to investigate t...
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| Published in: | Nanoscale 2016-03, Vol.8 (12), p.6341-6351 |
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| container_end_page | 6351 |
| container_issue | 12 |
| container_start_page | 6341 |
| container_title | Nanoscale |
| container_volume | 8 |
| creator | Cha, Jae-Min Lee, Jin-Wook Son, Dae-Yong Kim, Hui-Seon Jang, In-Hyuk Park, Nam-Gyu |
| description | Perovskite solar cells with high power conversion efficiency usually employ mesoporous TiO
2
, however the role of the TiO
2
layer has not been clearly resolved. Here we prepared MAPbI
3
(MA = CH
3
NH
3
) perovskite solar cells with an admixture of nanocrystalline TiO
2
and Al
2
O
3
to investigate the role of the mesoporous TiO
2
layer. The Al
2
O
3
content was varied from 0% (pure TiO
2
) to 100% (pure Al
2
O
3
) with nominal composition of (1 −
x
)TiO
2
+
x
Al
2
O
3
(
x
= 0, 0.25, 0.5, 0.75 and 1). The photocurrent density and fill factor decreased as Al
2
O
3
content increased, whereas the open-circuit voltage was hardly changed. Steady-state photoluminescence (PL) was less quenched as the Al
2
O
3
content increased due to its non-electron-injecting characteristics, where a decrease in PL intensity with increasing TiO
2
content was correlated to an increase in photocurrent. Electron injection to TiO
2
was also evidenced by time-resolved PL and time-limited photocurrent measurements, where interconnection of TiO
2
particles played an important role in charge collection. The slight change in voltage with Al
2
O
3
content was explained by balancing the Fermi position due to a trade-off between charge recombination and the Fermi level. The results observed from the admixture mesoporous layer comprising electron-injecting and electron-non-injecting oxides suggest that electron-injection characteristics play an important role in determining photovoltaic parameters.
Perovskite solar cells with an admixture of nanocrystalline TiO
2
and Al
2
O
3
are prepared to explore the role of the mesoporous TiO
2
layer: interconnection of TiO
2
particles plays an important role in charge collection. |
| doi_str_mv | 10.1039/c5nr05974g |
| format | article |
| fullrecord | <record><control><sourceid>rsc</sourceid><recordid>TN_cdi_rsc_primary_c5nr05974g</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>c5nr05974g</sourcerecordid><originalsourceid>FETCH-rsc_primary_c5nr05974g3</originalsourceid><addsrcrecordid>eNqFj8FOAkEQRCdGE1G5eDfpH0AHZlmy3ozReDFcuJNJ00BjM7PpHtH9BP9a1xg9eqpKvXcp5y7H_nrsQ3OD06R-2syqzZEbTHzlRyHMJse_va5O3ZnZzvu6CXUYuI9nsmyYW0ZoSfPBXrgQWJaogCRi8MZlCzFBXO35vbwqQV5DiimjdlaiCCeCBc-_nBXcyfwWNMu3xKmQYk6JsPCBS9ePvckJcBt1Q4BZpKc5XbiTdRSj4U-eu6vHh8X900gNl63yPmq3_PsX_uOflFJWjA</addsrcrecordid><sourcetype>Publisher</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Mesoscopic perovskite solar cells with an admixture of nanocrystalline TiO and AlO: role of interconnectivity of TiO in charge collection</title><source>Royal Society of Chemistry</source><creator>Cha, Jae-Min ; Lee, Jin-Wook ; Son, Dae-Yong ; Kim, Hui-Seon ; Jang, In-Hyuk ; Park, Nam-Gyu</creator><creatorcontrib>Cha, Jae-Min ; Lee, Jin-Wook ; Son, Dae-Yong ; Kim, Hui-Seon ; Jang, In-Hyuk ; Park, Nam-Gyu</creatorcontrib><description>Perovskite solar cells with high power conversion efficiency usually employ mesoporous TiO
2
, however the role of the TiO
2
layer has not been clearly resolved. Here we prepared MAPbI
3
(MA = CH
3
NH
3
) perovskite solar cells with an admixture of nanocrystalline TiO
2
and Al
2
O
3
to investigate the role of the mesoporous TiO
2
layer. The Al
2
O
3
content was varied from 0% (pure TiO
2
) to 100% (pure Al
2
O
3
) with nominal composition of (1 −
x
)TiO
2
+
x
Al
2
O
3
(
x
= 0, 0.25, 0.5, 0.75 and 1). The photocurrent density and fill factor decreased as Al
2
O
3
content increased, whereas the open-circuit voltage was hardly changed. Steady-state photoluminescence (PL) was less quenched as the Al
2
O
3
content increased due to its non-electron-injecting characteristics, where a decrease in PL intensity with increasing TiO
2
content was correlated to an increase in photocurrent. Electron injection to TiO
2
was also evidenced by time-resolved PL and time-limited photocurrent measurements, where interconnection of TiO
2
particles played an important role in charge collection. The slight change in voltage with Al
2
O
3
content was explained by balancing the Fermi position due to a trade-off between charge recombination and the Fermi level. The results observed from the admixture mesoporous layer comprising electron-injecting and electron-non-injecting oxides suggest that electron-injection characteristics play an important role in determining photovoltaic parameters.
Perovskite solar cells with an admixture of nanocrystalline TiO
2
and Al
2
O
3
are prepared to explore the role of the mesoporous TiO
2
layer: interconnection of TiO
2
particles plays an important role in charge collection.</description><identifier>ISSN: 2040-3364</identifier><identifier>EISSN: 2040-3372</identifier><identifier>DOI: 10.1039/c5nr05974g</identifier><ispartof>Nanoscale, 2016-03, Vol.8 (12), p.6341-6351</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Cha, Jae-Min</creatorcontrib><creatorcontrib>Lee, Jin-Wook</creatorcontrib><creatorcontrib>Son, Dae-Yong</creatorcontrib><creatorcontrib>Kim, Hui-Seon</creatorcontrib><creatorcontrib>Jang, In-Hyuk</creatorcontrib><creatorcontrib>Park, Nam-Gyu</creatorcontrib><title>Mesoscopic perovskite solar cells with an admixture of nanocrystalline TiO and AlO: role of interconnectivity of TiO in charge collection</title><title>Nanoscale</title><description>Perovskite solar cells with high power conversion efficiency usually employ mesoporous TiO
2
, however the role of the TiO
2
layer has not been clearly resolved. Here we prepared MAPbI
3
(MA = CH
3
NH
3
) perovskite solar cells with an admixture of nanocrystalline TiO
2
and Al
2
O
3
to investigate the role of the mesoporous TiO
2
layer. The Al
2
O
3
content was varied from 0% (pure TiO
2
) to 100% (pure Al
2
O
3
) with nominal composition of (1 −
x
)TiO
2
+
x
Al
2
O
3
(
x
= 0, 0.25, 0.5, 0.75 and 1). The photocurrent density and fill factor decreased as Al
2
O
3
content increased, whereas the open-circuit voltage was hardly changed. Steady-state photoluminescence (PL) was less quenched as the Al
2
O
3
content increased due to its non-electron-injecting characteristics, where a decrease in PL intensity with increasing TiO
2
content was correlated to an increase in photocurrent. Electron injection to TiO
2
was also evidenced by time-resolved PL and time-limited photocurrent measurements, where interconnection of TiO
2
particles played an important role in charge collection. The slight change in voltage with Al
2
O
3
content was explained by balancing the Fermi position due to a trade-off between charge recombination and the Fermi level. The results observed from the admixture mesoporous layer comprising electron-injecting and electron-non-injecting oxides suggest that electron-injection characteristics play an important role in determining photovoltaic parameters.
Perovskite solar cells with an admixture of nanocrystalline TiO
2
and Al
2
O
3
are prepared to explore the role of the mesoporous TiO
2
layer: interconnection of TiO
2
particles plays an important role in charge collection.</description><issn>2040-3364</issn><issn>2040-3372</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><sourceid/><recordid>eNqFj8FOAkEQRCdGE1G5eDfpH0AHZlmy3ozReDFcuJNJ00BjM7PpHtH9BP9a1xg9eqpKvXcp5y7H_nrsQ3OD06R-2syqzZEbTHzlRyHMJse_va5O3ZnZzvu6CXUYuI9nsmyYW0ZoSfPBXrgQWJaogCRi8MZlCzFBXO35vbwqQV5DiimjdlaiCCeCBc-_nBXcyfwWNMu3xKmQYk6JsPCBS9ePvckJcBt1Q4BZpKc5XbiTdRSj4U-eu6vHh8X900gNl63yPmq3_PsX_uOflFJWjA</recordid><startdate>20160317</startdate><enddate>20160317</enddate><creator>Cha, Jae-Min</creator><creator>Lee, Jin-Wook</creator><creator>Son, Dae-Yong</creator><creator>Kim, Hui-Seon</creator><creator>Jang, In-Hyuk</creator><creator>Park, Nam-Gyu</creator><scope/></search><sort><creationdate>20160317</creationdate><title>Mesoscopic perovskite solar cells with an admixture of nanocrystalline TiO and AlO: role of interconnectivity of TiO in charge collection</title><author>Cha, Jae-Min ; Lee, Jin-Wook ; Son, Dae-Yong ; Kim, Hui-Seon ; Jang, In-Hyuk ; Park, Nam-Gyu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-rsc_primary_c5nr05974g3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><creationdate>2016</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Cha, Jae-Min</creatorcontrib><creatorcontrib>Lee, Jin-Wook</creatorcontrib><creatorcontrib>Son, Dae-Yong</creatorcontrib><creatorcontrib>Kim, Hui-Seon</creatorcontrib><creatorcontrib>Jang, In-Hyuk</creatorcontrib><creatorcontrib>Park, Nam-Gyu</creatorcontrib><jtitle>Nanoscale</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Cha, Jae-Min</au><au>Lee, Jin-Wook</au><au>Son, Dae-Yong</au><au>Kim, Hui-Seon</au><au>Jang, In-Hyuk</au><au>Park, Nam-Gyu</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Mesoscopic perovskite solar cells with an admixture of nanocrystalline TiO and AlO: role of interconnectivity of TiO in charge collection</atitle><jtitle>Nanoscale</jtitle><date>2016-03-17</date><risdate>2016</risdate><volume>8</volume><issue>12</issue><spage>6341</spage><epage>6351</epage><pages>6341-6351</pages><issn>2040-3364</issn><eissn>2040-3372</eissn><abstract>Perovskite solar cells with high power conversion efficiency usually employ mesoporous TiO
2
, however the role of the TiO
2
layer has not been clearly resolved. Here we prepared MAPbI
3
(MA = CH
3
NH
3
) perovskite solar cells with an admixture of nanocrystalline TiO
2
and Al
2
O
3
to investigate the role of the mesoporous TiO
2
layer. The Al
2
O
3
content was varied from 0% (pure TiO
2
) to 100% (pure Al
2
O
3
) with nominal composition of (1 −
x
)TiO
2
+
x
Al
2
O
3
(
x
= 0, 0.25, 0.5, 0.75 and 1). The photocurrent density and fill factor decreased as Al
2
O
3
content increased, whereas the open-circuit voltage was hardly changed. Steady-state photoluminescence (PL) was less quenched as the Al
2
O
3
content increased due to its non-electron-injecting characteristics, where a decrease in PL intensity with increasing TiO
2
content was correlated to an increase in photocurrent. Electron injection to TiO
2
was also evidenced by time-resolved PL and time-limited photocurrent measurements, where interconnection of TiO
2
particles played an important role in charge collection. The slight change in voltage with Al
2
O
3
content was explained by balancing the Fermi position due to a trade-off between charge recombination and the Fermi level. The results observed from the admixture mesoporous layer comprising electron-injecting and electron-non-injecting oxides suggest that electron-injection characteristics play an important role in determining photovoltaic parameters.
Perovskite solar cells with an admixture of nanocrystalline TiO
2
and Al
2
O
3
are prepared to explore the role of the mesoporous TiO
2
layer: interconnection of TiO
2
particles plays an important role in charge collection.</abstract><doi>10.1039/c5nr05974g</doi><tpages>11</tpages></addata></record> |
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| identifier | ISSN: 2040-3364 |
| ispartof | Nanoscale, 2016-03, Vol.8 (12), p.6341-6351 |
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| language | |
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| source | Royal Society of Chemistry |
| title | Mesoscopic perovskite solar cells with an admixture of nanocrystalline TiO and AlO: role of interconnectivity of TiO in charge collection |
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