题目：

Hot-Electron Injection in Sandwiched TiO_x-Au-TiO_x Structure for High Performance Planar Perovskite Solar Cells

作者：

Zhongcheng Yuan^a, Zhongwei Wu^a, Sai Bai^b, Zhouhui Xia^a, Weidong Xu^a, Tao Song^a, Haihua Wu^a, Luhai Xu^a, Junjie Si^b, Yizheng Jin^b and Baoquan Sun^a*

单位：

^aInstitute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials &Devices, Soochow University, Suzhou, Jiangsu 215123, PR China

^bState Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

摘要：

Large amount of trap states in low temperature processed TiO_x film hindered the charge transport in perovskite solar cells. Here, gold nanoparticles (Au NPs) were incorporated into a sandwiched structure of TiO_x/Au NPs/ TiO_x to improve the charge transport properties of low temperature (150 oC) processed electron conductor layers through plasmonic-mediated hot carrier injection at metal-semiconductor Schottky junction. And based on this structure, a remarkable device performance of 16.2 % was achieved in planar perovskite device geometry. A detailed investigation on the hot-electron generation and injection process of TiO_x /Au NPs/ TiO_x composites was demonstrated to explain the origin of device improvement. Further investigation revealed that hot electrons could be injected from Au NPs to TiO_x at the  plasmonic wavelength (500-600 nm) of Au NPs, resulting in increased film conductivity and surface potential of the TiOx film. The sandwitched structure of TiO_x/Au NPs/TiO_x is a key to achieve enhanced device performance to aovid any direct contact between Au NPs and perovskite, which is quite different from conjugated polymer/fullerene derivative solar cells. Our present work provides an alternative design of novel charge extracting layer toward low temperature processed highly efficiencient perovskite solar cells.

影响因子：

14.385

分区情况：

1区

链接：

http://onlinelibrary.wiley.com/doi/10.1002/aenm.201500038/epdf