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Ultrafast Electron Injection from Photoexcited Perovskite CsPbI3 QDs into TiO2 Nanoparticles with Injection Efficiency near 99%
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2018-01-03 00:00:00 , DOI: 10.1021/acs.jpclett.7b03062 Feng Liu 1 , Yaohong Zhang 1 , Chao Ding 1 , Taro Toyoda 1, 2 , Yuhei Ogomi 3 , Teresa S. Ripolles 3 , Shuzi Hayase 2, 3 , Takashi Minemoto 2, 4 , Kenji Yoshino 2, 5 , Songyuan Dai 6 , Qing Shen 1, 2
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2018-01-03 00:00:00 , DOI: 10.1021/acs.jpclett.7b03062 Feng Liu 1 , Yaohong Zhang 1 , Chao Ding 1 , Taro Toyoda 1, 2 , Yuhei Ogomi 3 , Teresa S. Ripolles 3 , Shuzi Hayase 2, 3 , Takashi Minemoto 2, 4 , Kenji Yoshino 2, 5 , Songyuan Dai 6 , Qing Shen 1, 2
Affiliation
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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 ∼99% of the photoexcited electrons in CsPbI3 QDs can be injected into TiO2 with a size-dependent rate ranging from 1.30 × 1010 to 2.10 × 1010 s–1, which is also ∼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%.
中文翻译：
将光激发钙钛矿CsPbI 3 QDs超快电子注入到TiO 2纳米粒子中，注入效率接近99％
通过瞬态吸收光谱研究了从CsPbI 3量子点（QDs）到宽禁带金属氧化物的光激发电子注入动力学。实验结果显示出低的激发强度，所述光激发电子的〜99％在CsPbI下3个QD可注入的TiO 2的尺寸依赖性率范围从1.30×10 10 2.10×10 10小号-1，这也是比ZnO快约2.5倍。制造了基于CsPbI 3 / TiO 2电极的QD增感太阳能电池，其功率转换效率为5％。
更新日期：2018-01-03
中文翻译：
将光激发钙钛矿CsPbI 3 QDs超快电子注入到TiO 2纳米粒子中，注入效率接近99％
通过瞬态吸收光谱研究了从CsPbI 3量子点（QDs）到宽禁带金属氧化物的光激发电子注入动力学。实验结果显示出低的激发强度，所述光激发电子的〜99％在CsPbI下3个QD可注入的TiO 2的尺寸依赖性率范围从1.30×10 10 2.10×10 10小号-1，这也是比ZnO快约2.5倍。制造了基于CsPbI 3 / TiO 2电极的QD增感太阳能电池，其功率转换效率为5％。
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