Molecular doping enabled scalable blading of efficient hole-transport-layer-free perovskite solar cells

Authors

Wu-Qiang Wu, University of North Carolina
Qi Wang, University of Nebraska-LincolnFollow
Yanjun Fang, University of Nebraska-LincolnFollow
Yuchuan Shao, University of North Carolina
Shi Tang, University of Nebraska-Lincoln
Yehao Deng, University of Nebraska-LincolnFollow
Haidong Lu, University of Nebraska-LincolnFollow
Ye Liu, University of Nebraska-LincolnFollow
Tao Li, University of Nebraska-LincolnFollow
Zhibin Yang, University of North Carolina
Alexei Gruverman, University of Nebraska-LincolnFollow
Jinsong Huang, University of North CarolinaFollow

Date of this Version

2018

Citation

NATURE COMMUNICATIONS | (2018) 9:1625

Comments

© The Author(s) 2018

Open access

DOI: 10.1038/s41467-018-04028-8

Abstract

The efficiencies of perovskite solar cells (PSCs) are now reaching such consistently high levels that scalable manufacturing at low cost is becoming critical. However, this remains challenging due to the expensive hole-transporting materials usually employed, and difficulties associated with the scalable deposition of other functional layers. By simplifying the device architecture, hole-transport-layer-free PSCs with improved photovoltaic performance are fabricated via a scalable doctor-blading process. Molecular doping of halide perovskite films improved the conductivity of the films and their electronic contact with the conductive substrate, resulting in a reduced series resistance. It facilitates the extraction of photoexcited holes from perovskite directly to the conductive substrate. The bladed hole-transport-layerfree PSCs showed a stabilized power conversion efficiency above 20.0%. This work represents a significant step towards the scalable, cost-effective manufacturing of PSCs with both high performance and simple fabrication processes.