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DC Field | Value | Language |
---|---|---|
dc.citation.endPage | 5426 | - |
dc.citation.number | 12 | - |
dc.citation.startPage | 5417 | - |
dc.citation.title | LANGMUIR | - |
dc.citation.volume | 28 | - |
dc.contributor.author | Jin, Ho | - |
dc.contributor.author | Choi, Sukyung | - |
dc.contributor.author | Velu, Ranganathan | - |
dc.contributor.author | Kim, Sungjee | - |
dc.contributor.author | Lee, Hyo Joong | - |
dc.date.accessioned | 2024-03-11T17:35:13Z | - |
dc.date.available | 2024-03-11T17:35:13Z | - |
dc.date.created | 2024-03-11 | - |
dc.date.issued | 2012-03 | - |
dc.description.abstract | A multilayer of CdSe quantum dots (QDs) was prepared on the mesoporous surface of a nanoparticulate TiO2 film by a layer-by-layer (LBL) assembly using the electrostatic interaction of the oppositely charged QD surface for application as a sensitizer in QD-sensitized TiO2 solar cells. To maximize the absorption of incident light and the generation of excitons by CdSe QDs within a fixed thickness of TiO2 film, the experimental conditions of QD deposition were optimized by controlling the concentration of salt added into the QD-dissolved solutions and repeating the LBL deposition a few times. A proper concentration of salt was found to be critical in providing a deep penetration of QDs into the mesopore, thus leading to a dense and uniform distribution throughout the whole TiO2 matrix while anchoring the oppositely charged QDs alternately in a controllable way. A series of post-treatments with (1) CdCl2, (2) thermal annealing, and (3) ZnS-coating was found to be very critical in improving the overall photovoltaic properties, presumably through a better connection between QDs, effective passivation of QD's surface, and a high impedance of recombination, which were proved by transmission electron microscopy (TEM) and electrochemical impedance spectroscopy (EIS) experiments. With a proper post-treatment of multilayered QDs as a sensitizer, the overall power conversion efficiency in the CdSe QD-sensitized TiO2 solar cells could reach 1.9% under standard illumination condition of simulated AM 1.5G (100 mW/cm(2)). | - |
dc.identifier.bibliographicCitation | LANGMUIR, v.28, no.12, pp.5417 - 5426 | - |
dc.identifier.doi | 10.1021/la202892h | - |
dc.identifier.issn | 0743-7463 | - |
dc.identifier.scopusid | 2-s2.0-84859134537 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/81548 | - |
dc.identifier.wosid | 000301947400012 | - |
dc.language | 영어 | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Preparation of Multilayered CdSe Quantum Dot Sensitizers by Electrostatic Layer-by-Layer Assembly and a Series of Post-treatments toward Efficient Quantum Dot-Sensitized Mesoporous TiO2 Solar Cells | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary | - |
dc.relation.journalResearchArea | Chemistry; Materials Science | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | SEMICONDUCTOR NANOCRYSTALS | - |
dc.subject.keywordPlus | ZERO CHARGE | - |
dc.subject.keywordPlus | GROWTH | - |
dc.subject.keywordPlus | CDTE | - |
dc.subject.keywordPlus | RECRYSTALLIZATION | - |
dc.subject.keywordPlus | PHOTOSTABILITY | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | ELECTRODES | - |
dc.subject.keywordPlus | INJECTION | - |
dc.subject.keywordPlus | ENERGY | - |
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