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Ligand-dependent exciton dynamics and photovoltaic properties of PbS quantum dot heterojunction solar cells
http://hdl.handle.net/10228/00006638
http://hdl.handle.net/10228/00006638a9216bd3-045d-405f-852d-17a790ae4474
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
PCCP19_6358.pdf (1.9 MB)
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| アイテムタイプ | 学術雑誌論文 = Journal Article(1) | |||||
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| 公開日 | 2018-03-07 | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| タイトル | ||||||
| タイトル | Ligand-dependent exciton dynamics and photovoltaic properties of PbS quantum dot heterojunction solar cells | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 著者 |
Chang, Jin
× Chang, Jin× 尾込, 裕平× Ding, Chao× Zhang, Yao Hong× Toyoda, Taro× 早瀬, 修二× Katayama, Kenji× Shen, Qing |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The surface chemistry of colloidal quantum dots (QDs) plays an important role in determining the photoelectric properties of QD films and the corresponding quantum dot heterojunction solar cells (QDHSCs). To investigate the effects of the ligand structure on the photovoltaic performance and exciton dynamics of QDHSCs, PbS QDHSCs were fabricated by the solid state ligand exchange method with mercaptoalkanoic acid as the cross-linking ligand. Temperature-dependent photoluminescence and ultrafast transient absorption spectra show that the electronic coupling and charge transfer rate within QD ensembles were monotonically enhanced as the ligand length decreased. However, in practical QDHSCs, the second shortest ligand 3-mercaptopropionic acid (MPA) showed higher power conversion efficiency than the shortest ligand thioglycolic acid (TGA). This could be attributed to the difference in their surface trap states, supported by thermally stimulated current measurements. Moreover, compared with the non-conjugated ligand MPA, the conjugated ligand 4-mercaptobenzoic acid (MBA) introduces less trap states and has a similar charge transfer rate in QD ensembles, but has poor photovoltaic properties. This unexpected result could be contributed by the QD–ligand orbital mixing, leading to the charge transfer from QDs to ligands instead of charge transfer between adjacent QDs. This work highlights the significant effects of ligand structures on the photovoltaic properties and exciton dynamics of QDHSCs, which would shed light on the further development of QD-based photoelectric devices. | |||||
| 言語 | en | |||||
| 書誌情報 |
en : Physical Chemistry Chemical Physics 巻 19, 号 9, p. 6358-6367, 発行日 2017-03-07 |
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| 出版社 | ||||||
| 出版者 | Royal Society of Chemistry | |||||
| 言語 | en | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1039/C6CP06561A | |||||
| ISSN | ||||||
| 収録物識別子タイプ | EISSN | |||||
| 収録物識別子 | 1463-9084 | |||||
| 著作権関連情報 | ||||||
| 権利情報 | Copyright (c) the Owner Societies 2017 | |||||
| 出版タイプ | ||||||
| 出版タイプ | AM | |||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
| 査読の有無 | ||||||
| 値 | yes | |||||
| 研究者情報 | ||||||
| URL | https://hyokadb02.jimu.kyutech.ac.jp/html/322_ja.html | |||||
| 論文ID（連携） | ||||||
| 値 | 10310149 | |||||
| 連携ID | ||||||
| 値 | 6673 | |||||
