DC Field | Value | Language |
---|---|---|
dc.contributor.author | Jang, Jihoon | ko |
dc.contributor.author | Song, Jung Hoon | ko |
dc.contributor.author | Choi, Hyekyoung | ko |
dc.contributor.author | Baik, Seung Jae | ko |
dc.contributor.author | Jeong, Sohee | ko |
dc.date.accessioned | 2016-04-15T02:58:47Z | - |
dc.date.available | 2016-04-15T02:58:47Z | - |
dc.date.created | 2015-09-07 | - |
dc.date.created | 2015-09-07 | - |
dc.date.issued | 2015-10 | - |
dc.identifier.citation | SOLAR ENERGY MATERIALS AND SOLAR CELLS, v.141, pp.270 - 274 | - |
dc.identifier.issn | 0927-0248 | - |
dc.identifier.uri | http://hdl.handle.net/10203/203875 | - |
dc.description.abstract | Using a combination of quantum dots (QDs) of different sizes, and thus different bandgaps, to extend the light-harvesting spectrum of a photovoltaic device in tandem architecture is a promising strategy for increasing the solar cell efficiency. In this study, we propose a new architecture for a solar cell device consisting of a graded-bandgap active layer made of lead sulfide QDs of different sizes and based on the structure of the Schottky junction. Colloidal PbS QDs with bandgaps of 1.55, 1.44, and 1.36 eV were synthesized and used to construct a series of Schottky junction solar cells. Cells with a graded-bandgap active layer exhibited an increase in short-circuit current density (J(sc)) but yielded lower open-circuit voltage (V-oc) compared with cells having a uniform bandgap. We found that adding a thin electron energy-boosting layer (EEB) made from 1.55-eV-bandgap QDs can partially compensate for the thermalization loss, and thus enhance J(sc) and recover V-oc. Consequently, this study provides a conceptual basis for further improvement in colloidal QD-based solar cells. | - |
dc.language | English | - |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.subject | SOLAR-CELLS | - |
dc.subject | NANOPARTICLES | - |
dc.subject | PERFORMANCE | - |
dc.subject | EFFICIENCY | - |
dc.title | Photovoltaic light absorber with spatial energy band gradient using PbS quantum dot layers | - |
dc.type | Article | - |
dc.identifier.wosid | 000359504200033 | - |
dc.identifier.scopusid | 2-s2.0-84934957886 | - |
dc.type.rims | ART | - |
dc.citation.volume | 141 | - |
dc.citation.beginningpage | 270 | - |
dc.citation.endingpage | 274 | - |
dc.citation.publicationname | SOLAR ENERGY MATERIALS AND SOLAR CELLS | - |
dc.identifier.doi | 10.1016/j.solmat.2015.06.007 | - |
dc.contributor.nonIdAuthor | Jang, Jihoon | - |
dc.contributor.nonIdAuthor | Choi, Hyekyoung | - |
dc.contributor.nonIdAuthor | Baik, Seung Jae | - |
dc.contributor.nonIdAuthor | Jeong, Sohee | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | PbS quantum dot solar cell | - |
dc.subject.keywordAuthor | Schottky junction solar cell | - |
dc.subject.keywordAuthor | Graded bandgap | - |
dc.subject.keywordAuthor | Electron energy booster | - |
dc.subject.keywordPlus | SOLAR-CELLS | - |
dc.subject.keywordPlus | NANOPARTICLES | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | EFFICIENCY | - |
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