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Numerical comparison of quantum-confined Stark effect on emission spectra between InP- and CdSe-based colloidal quantum dots
We numerically compare the quantum-confined Stark effect (QCSE) on emission spectra between InP/ZnSe/ZnS and CdSe/ZnSe/ZnS colloidal quantum dots (QDs). Because the bandgap energy of InP is greater than that of CdSe, the total layer thickness of an InP/ZnSe/ZnS QD is determined to be less than that...
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| Published in: | Journal of the Korean Physical Society 2023-11, Vol.83 (10), p.769-779 |
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| creator | Jang, Deokho Kim, Jungho |
| description | We numerically compare the quantum-confined Stark effect (QCSE) on emission spectra between InP/ZnSe/ZnS and CdSe/ZnSe/ZnS colloidal quantum dots (QDs). Because the bandgap energy of InP is greater than that of CdSe, the total layer thickness of an InP/ZnSe/ZnS QD is determined to be less than that of a CdSe/ZnSe/ZnS QD for both QDs to have the same emission peak wavelength of 563 nm. After strain-modified band-edge energies for electron and heavy hole are calculated, a three-dimensional Schrödinger equation is numerically solved based on the finite element method. The changes in ground-state energy levels, wave-function overlap integrals, and exciton binding energies of the thick CdSe-based QD are much greater than those of the thin InP-based QD when the external electric field intensity increases from 0 to 100 kV/cm. In calculated emission spectra, the CdSe-based QD shows the integrated emission intensity reduction of 6% and ground-state emission peak shift of 0.91 nm. In contrast, the integrated emission intensity decreases by 0.02% and its ground-state emission peak shifts by 0.06 nm for the InP-based QD. Because the degree of the QCSE is proportional to the size of QDs, the emission spectrum of thin InP-based QDs is less sensitive to the QCSE than that of thick CdSe-based QDs when they have the similar peak emission wavelength. |
| doi_str_mv | 10.1007/s40042-023-00945-0 |
| format | article |
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Because the bandgap energy of InP is greater than that of CdSe, the total layer thickness of an InP/ZnSe/ZnS QD is determined to be less than that of a CdSe/ZnSe/ZnS QD for both QDs to have the same emission peak wavelength of 563 nm. After strain-modified band-edge energies for electron and heavy hole are calculated, a three-dimensional Schrödinger equation is numerically solved based on the finite element method. The changes in ground-state energy levels, wave-function overlap integrals, and exciton binding energies of the thick CdSe-based QD are much greater than those of the thin InP-based QD when the external electric field intensity increases from 0 to 100 kV/cm. In calculated emission spectra, the CdSe-based QD shows the integrated emission intensity reduction of 6% and ground-state emission peak shift of 0.91 nm. In contrast, the integrated emission intensity decreases by 0.02% and its ground-state emission peak shifts by 0.06 nm for the InP-based QD. Because the degree of the QCSE is proportional to the size of QDs, the emission spectrum of thin InP-based QDs is less sensitive to the QCSE than that of thick CdSe-based QDs when they have the similar peak emission wavelength.</description><identifier>ISSN: 0374-4884</identifier><identifier>EISSN: 1976-8524</identifier><identifier>DOI: 10.1007/s40042-023-00945-0</identifier><language>eng</language><publisher>Seoul: The Korean Physical Society</publisher><subject>Cadmium selenides ; Electric fields ; Emission spectra ; Energy levels ; Excitons ; Finite element method ; Mathematical analysis ; Mathematical and Computational Physics ; Original Paper - Condensed Matter ; Particle and Nuclear Physics ; Physics ; Physics and Astronomy ; Quantum dots ; Schrodinger equation ; Spectral emissivity ; Stark effect ; Theoretical ; Thickness ; Zinc selenide ; Zinc sulfide</subject><ispartof>Journal of the Korean Physical Society, 2023-11, Vol.83 (10), p.769-779</ispartof><rights>The Korean Physical Society 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c319t-71358aac3e5d8d5ef0ec18b5c5732108dbdd5f7d05a6028da90286baa8ce7bcf3</citedby><cites>FETCH-LOGICAL-c319t-71358aac3e5d8d5ef0ec18b5c5732108dbdd5f7d05a6028da90286baa8ce7bcf3</cites><orcidid>0000-0002-4587-5412</orcidid></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>Jang, Deokho</creatorcontrib><creatorcontrib>Kim, Jungho</creatorcontrib><title>Numerical comparison of quantum-confined Stark effect on emission spectra between InP- and CdSe-based colloidal quantum dots</title><title>Journal of the Korean Physical Society</title><addtitle>J. Korean Phys. Soc</addtitle><description>We numerically compare the quantum-confined Stark effect (QCSE) on emission spectra between InP/ZnSe/ZnS and CdSe/ZnSe/ZnS colloidal quantum dots (QDs). Because the bandgap energy of InP is greater than that of CdSe, the total layer thickness of an InP/ZnSe/ZnS QD is determined to be less than that of a CdSe/ZnSe/ZnS QD for both QDs to have the same emission peak wavelength of 563 nm. After strain-modified band-edge energies for electron and heavy hole are calculated, a three-dimensional Schrödinger equation is numerically solved based on the finite element method. The changes in ground-state energy levels, wave-function overlap integrals, and exciton binding energies of the thick CdSe-based QD are much greater than those of the thin InP-based QD when the external electric field intensity increases from 0 to 100 kV/cm. In calculated emission spectra, the CdSe-based QD shows the integrated emission intensity reduction of 6% and ground-state emission peak shift of 0.91 nm. In contrast, the integrated emission intensity decreases by 0.02% and its ground-state emission peak shifts by 0.06 nm for the InP-based QD. Because the degree of the QCSE is proportional to the size of QDs, the emission spectrum of thin InP-based QDs is less sensitive to the QCSE than that of thick CdSe-based QDs when they have the similar peak emission wavelength.</description><subject>Cadmium selenides</subject><subject>Electric fields</subject><subject>Emission spectra</subject><subject>Energy levels</subject><subject>Excitons</subject><subject>Finite element method</subject><subject>Mathematical analysis</subject><subject>Mathematical and Computational Physics</subject><subject>Original Paper - Condensed Matter</subject><subject>Particle and Nuclear Physics</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>Quantum dots</subject><subject>Schrodinger equation</subject><subject>Spectral emissivity</subject><subject>Stark effect</subject><subject>Theoretical</subject><subject>Thickness</subject><subject>Zinc selenide</subject><subject>Zinc sulfide</subject><issn>0374-4884</issn><issn>1976-8524</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNp9kEtLxTAQhYMoeH38AVcB19FJ07TpUi6-QFRQ1yFNJlK9Ta5Jiwj-eKNXcOdmZhi-cw4cQo44nHCA9jTXAHXFoBIMoKslgy2y4F3bMCWrepssQLQ1q5Wqd8lezi-FFqJtFuTzdh4xDdasqI3j2qQhx0Cjp2-zCdM8MhuDHwI6-jCZ9ErRe7QTLQyOQ85DOfK6fJKhPU7viIFeh3tGTXB06R6Q9SYXsY2rVRxcSfn1pS5O-YDseLPKePi798nTxfnj8ord3F1eL89umBW8m1jLhVTGWIHSKSfRA1quemllKyoOyvXOSd86kKaBSjnTldn0xiiLbW-92CfHG991im8z5km_xDmFEqkr1VWdgoY3hao2lE0x54Rer9MwmvShOejvlvWmZV1a1j8taygisRHlAodnTH_W_6i-AEaLggc</recordid><startdate>20231101</startdate><enddate>20231101</enddate><creator>Jang, Deokho</creator><creator>Kim, Jungho</creator><general>The Korean Physical Society</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0002-4587-5412</orcidid></search><sort><creationdate>20231101</creationdate><title>Numerical comparison of quantum-confined Stark effect on emission spectra between InP- and CdSe-based colloidal quantum dots</title><author>Jang, Deokho ; Kim, Jungho</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c319t-71358aac3e5d8d5ef0ec18b5c5732108dbdd5f7d05a6028da90286baa8ce7bcf3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Cadmium selenides</topic><topic>Electric fields</topic><topic>Emission spectra</topic><topic>Energy levels</topic><topic>Excitons</topic><topic>Finite element method</topic><topic>Mathematical analysis</topic><topic>Mathematical and Computational Physics</topic><topic>Original Paper - Condensed Matter</topic><topic>Particle and Nuclear Physics</topic><topic>Physics</topic><topic>Physics and Astronomy</topic><topic>Quantum dots</topic><topic>Schrodinger equation</topic><topic>Spectral emissivity</topic><topic>Stark effect</topic><topic>Theoretical</topic><topic>Thickness</topic><topic>Zinc selenide</topic><topic>Zinc sulfide</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jang, Deokho</creatorcontrib><creatorcontrib>Kim, Jungho</creatorcontrib><collection>CrossRef</collection><jtitle>Journal of the Korean Physical Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jang, Deokho</au><au>Kim, Jungho</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Numerical comparison of quantum-confined Stark effect on emission spectra between InP- and CdSe-based colloidal quantum dots</atitle><jtitle>Journal of the Korean Physical Society</jtitle><stitle>J. Korean Phys. Soc</stitle><date>2023-11-01</date><risdate>2023</risdate><volume>83</volume><issue>10</issue><spage>769</spage><epage>779</epage><pages>769-779</pages><issn>0374-4884</issn><eissn>1976-8524</eissn><abstract>We numerically compare the quantum-confined Stark effect (QCSE) on emission spectra between InP/ZnSe/ZnS and CdSe/ZnSe/ZnS colloidal quantum dots (QDs). Because the bandgap energy of InP is greater than that of CdSe, the total layer thickness of an InP/ZnSe/ZnS QD is determined to be less than that of a CdSe/ZnSe/ZnS QD for both QDs to have the same emission peak wavelength of 563 nm. After strain-modified band-edge energies for electron and heavy hole are calculated, a three-dimensional Schrödinger equation is numerically solved based on the finite element method. The changes in ground-state energy levels, wave-function overlap integrals, and exciton binding energies of the thick CdSe-based QD are much greater than those of the thin InP-based QD when the external electric field intensity increases from 0 to 100 kV/cm. In calculated emission spectra, the CdSe-based QD shows the integrated emission intensity reduction of 6% and ground-state emission peak shift of 0.91 nm. In contrast, the integrated emission intensity decreases by 0.02% and its ground-state emission peak shifts by 0.06 nm for the InP-based QD. Because the degree of the QCSE is proportional to the size of QDs, the emission spectrum of thin InP-based QDs is less sensitive to the QCSE than that of thick CdSe-based QDs when they have the similar peak emission wavelength.</abstract><cop>Seoul</cop><pub>The Korean Physical Society</pub><doi>10.1007/s40042-023-00945-0</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0002-4587-5412</orcidid></addata></record> |
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| subjects | Cadmium selenides Electric fields Emission spectra Energy levels Excitons Finite element method Mathematical analysis Mathematical and Computational Physics Original Paper - Condensed Matter Particle and Nuclear Physics Physics Physics and Astronomy Quantum dots Schrodinger equation Spectral emissivity Stark effect Theoretical Thickness Zinc selenide Zinc sulfide |
| title | Numerical comparison of quantum-confined Stark effect on emission spectra between InP- and CdSe-based colloidal quantum dots |
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