光致发光
钙钛矿(结构)
开路电压
碘化物
平面的
重组
材料科学
电压
电子
光电子学
量子效率
分子物理学
化学
无机化学
结晶学
计算机科学
物理
计算机图形学(图像)
基因
量子力学
生物化学
作者
Zhifa Liu,Lisa Krückemeier,Benedikt Krogmeier,Benjamin Klingebiel,J.A. Marquez,S. Levcenko,Senol Öz,Sanjay Mathur,Uwe Rau,Thomas Unold,Thomas Kirchartz
出处
期刊:ACS energy letters
[American Chemical Society]
日期:2018-12-06
卷期号:4 (1): 110-117
被引量:301
标识
DOI:10.1021/acsenergylett.8b01906
摘要
We demonstrate open-circuit voltages exceeding 1.26 V for inverted planar CH3NH3PbI3 solar cells fabricated using a combination of lead acetate and PbCl2 precursors leading to smooth films and large grain sizes. Surface recombination is suppressed by careful optimization of the PTAA hole transport and PCBM electron transport layers. Suppression of bulk and surface recombination is verified by absolute photoluminescence measurements with external quantum efficiencies of ∼5% in complete cells. In addition, we find exceptionally long photoluminescence lifetimes in full cells and in layer stacks involving one or two contact layers. Numerical simulations reveal that these long photoluminescence lifetimes are only possible with extremely low recombination velocities at the interfaces between absorber and contact materials.
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