期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 20, 期 37, 页码 24444-24452出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8cp03555e
关键词
-
资金
- ISF [661/16]
- Harry de Jur Chair in Applied Science
- Enrique Berman Chair in Solar energy research
- Sustainability and Energy Research Initiative, SAERI
- Israel Ministry of Science and Technology
In-gap states in solar cell absorbers that are recombination centers determine the cell's photovoltaic performance. Using scanning tunneling spectroscopy (STS), temperature-dependent photoconductivity and steady-state photocarrier-grating measurements we probed, directly and indirectly, the energies of such states, both at the surface and in the bulk of two similar, but different halide perovskites, the single cation MAPbI(3) (here MAPI) and the mixed cation halide perovskite, FA(0.79)MA(0.16)Cs(0.05)Pb(I0.83Br0.17)(3) (here MCHP). We found a correlation between the energy distribution of the in-gap states, as determined by STS measurements, and their manifestation in the photo-transport parameters of the MCHP absorbers. In particular, our results suggest that the in-gap recombination centers in the MCHP are shallower than those of MAPI. This can be one explanation for the better photovoltaic efficiency of the former.
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