题目：

Improved Hole Interfacial Layer for Planar Perovskite Solar Cells with

Efficiency Exceeding 15%

作者：

Zhao-Kui Wang,^† Meng Li,^‡ Da-Xing Yuan,^† Xiao-Bo Shi,^† Heng Ma,^‡ and Liang-Sheng Liao^*,^†

单位：

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

^‡College of Physics and Electronic Engineering, Henan Normal University, Xinxiang 453007, China

摘要：

Planar structure has been proven to be efficient and convenient in fabricating low-temperature and solution-processing perovkite solar cells (PSCs). Interface control and crystal film growth of organometal halide films are regarded as the most important factors to obtain high-performance PSCs. Herein, we report a solutionprocessed PEDOT:PSS-GeO₂ composite films by simply incorporating the GeO₂ aqueous solution into the PEDOT:PSS aqueous dispersion as a hole transport layer in planar PSCs. Besides the merits of high conductivity, ambient stability and interface modification of PEDOT:PSS-GeO₂ composite films, the formed island-like GeO₂ particles are assumed to act as growing sites of crystal nucleus of perovskite films during annealing. By the seed-mediation of GeO₂ particles, a superior CH₃NH₃PbI_3−xCl_x crystalline film with large-scale domains and good film uniformity was obtained. The resulting PSC device with PEDOT:PSS-GeO₂ composite film as HTL shows a best performance with 15.15% PCE and a fill factor (FF) of 74%. There is a remarkable improvement (-37%) in PCE, from 9.87% to 13.54% (in average for over 120 devices), compared with the reference pristine PEDOT:PSS based device.

影响因子：

5.9

分区情况：

1区

链接：

http://pubs.acs.org/doi/abs/10.1021/acsami.5b01330