期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 6, 期 22, 页码 4640-4645出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.5b02014
关键词
-
类别
资金
- Israel Strategic Alternative Energy Foundation (I-SAEF)
- Tashtiyot Program of the Israeli Ministry of Science Technology
- European Union Seventh Framework Program Destiny Project [316494]
- Singapore NRF through the Competitive Research Program [NRF-CRP4-2008-03, NRF-CRP14-2014-03]
The high open-circuit potential (V-oc) achieved by perovskite solar cells (PSCs) is one of the keys to their success. The V-oc analysis is essential to understand their working mechanisms. A large number of CH3NH3PbI3-xClx PSCs were fabricated on single large-area substrates and their V-oc dependencies on illumination intensity, I-0, were measured showing three distinctive regions. Similar results obtained in Al2O3 based PSCs relate the effect to the compact TiO2 rather than the mesoporous oxide. We propose that two working mechanisms control the V-oc in PSCs. The rise of V-oc, at low I-0 is determined by the employed semiconductor n-type contact (TiO2 or MgO coated TiO2). In contrast, at I-0 close to AM1.5G, the employed oxide does not affect the achieved voltage. Thus, a change of regime from an oxide-dominated E-Fn (as in the dye sensitized solar cells) to an E-Fn, directly determined by the CH3NH3PbI3-xClx absorber is suggested.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据