Ultrafast Electron Injection from Photoexcited Perovskite CsPbI3 QDs into TiO2 Nanoparticles with Injection Efficiency near 99%

被引：80

作者：

Liu, Feng ^{[1
]}

Zhang, Yaohong ^{[1
]}

Ding, Chao ^{[1
]}

Toyoda, Taro ^{[1
,6
]}

Ogomi, Yuhei ^{[2
]}

Ripolles, Teresa S. ^{[2
]}

Hayase, Shuzi ^{[2
,6
]}

Minemoto, Takashi ^{[3
,6
]}

Yoshino, Kenji ^{[4
,6
]}

Dai, Songyuan ^{[5
]}

Shen, Qing ^{[1
,6
]}

机构：

[1] Univ Electrocommun, Fac Informat & Engn, 1-5-1 Chofugaoka, Chofu, Tokyo 1828585, Japan

[2] Kyushu Inst Technol, Fac Life Sci & Syst Engn, Wakamatsu Ku, 2-4 Hibikino, Kitakyushu, Fukuoka 8080196, Japan

[3] Ritsumeikan Univ, Fac Sci & Engn, Dept Elect & Elect Engn, 1-1-1 Nojihigashi, Kusatsu, Shiga 5258577, Japan

[4] Miyazaki Univ, Dept Elect & Elect Engn, 1-1 Gakuen Kibanadai Nishi, Miyazaki 8892192, Japan

[5] North China Elect Power Univ, State Key Lab Alternate Elect Power Syst Renewabl, Beijing Key Lab Novel Thin Film Solar Cells, Beijing 102206, Peoples R China

[6] Japan Sci & Technol Agcy JST, CREST, 4-1-8 Honcho, Kawaguchi, Saitama 3320012, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2018年 / 9卷 / 02期

基金：

日本科学技术振兴机构;

关键词：

HALIDE PEROVSKITES; QUANTUM DOTS; NANOCRYSTALS; DYNAMICS; DYE;

D O I：

10.1021/acs.jpclett.7b03062

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photoexcited electron injection dynamics from CsPbI3 quantum dots (QDs) to wide gap metal oxides are studied by transient absorption spectroscopy. Experimental results show under a low excitation intensity that similar to 99% of the photoexcited electrons in CsPbI3 QDs can be injected into TiO2 with a size-dependent rate ranging from 1.30 x 10(10) to 2.10 x 10(10) s(-1), which is also similar to 2.5 times faster than that in the case of ZnO. A demonstration QD-sensitized solar cell based on a CsPbI3/TiO2 electrode is fabricated that delivers a power conversion efficiency of 5%.

引用

页码：294 / 297

页数：4

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