Enhanced perovskite morphology and crystallinity for high performance perovskite solar cells using a porous hole transport layer from polystyrene nanospheres

Fan Zhang; Jun Song; Ming Chen; Junchen Liu; Yuying Hao; Yuncai Wang; Junle Qu; Pengju Zeng

doi:10.1039/c6cp06405a

Enhanced perovskite morphology and crystallinity for high performance perovskite solar cells using a porous hole transport layer from polystyrene nanospheres

Phys Chem Chem Phys. 2016 Dec 7;18(48):32903-32909. doi: 10.1039/c6cp06405a.

Authors

Fan Zhang¹, Jun Song², Ming Chen³, Junchen Liu², Yuying Hao³, Yuncai Wang³, Junle Qu², Pengju Zeng²

Affiliations

¹ Taiyuan University of Technology, Taiyuan 030024, China. haoyuying@tyut.edu.cn and Institute of Optoelectronics, Key Lab of Optoelectronics Devices and Systems of Ministry of Education/Guangdong Province, Shenzhen University, Shenzhen 518060, China. songjun@szu.edu.cn.
² Institute of Optoelectronics, Key Lab of Optoelectronics Devices and Systems of Ministry of Education/Guangdong Province, Shenzhen University, Shenzhen 518060, China. songjun@szu.edu.cn.
³ Taiyuan University of Technology, Taiyuan 030024, China. haoyuying@tyut.edu.cn.

PMID: 27883127
DOI: 10.1039/c6cp06405a

Abstract

Organic-inorganic metal halide perovskites have led to remarkable advancements in emerging photovoltaics. The rapid increase in the power conversion efficiency (PCE) of PSCs has been mainly achieved by improving perovskite morphology and crystallinity. Herein, we report a simple and effective means to improve perovskite grain sizes using a porous hole transport layer (i.e.

, pedot: PSS in this work). We used polystyrene nanospheres as a sacrificial template to fabricate the porous-PEDOT:PSS. The growth of the CH₃NH₃PbI₃ perovskite film on the porous-PEDOT:PSS substrate yields a dramatic improvement in crystallinity and an enhancement in perovskite grain sizes. When the porous structure was applied as a hole transport layer in PSCs with planar heterojunction structures, the efficiency was significantly enhanced from 15.33% for the planar device to 17.32%. This simple method for enhancing perovskite morphology and crystallinity paves the way for its application to other device architectures for enhanced photovoltaic performance.