Crosslinked Remote-Doped Hole-Extracting Contacts Enhance Stability under Accelerated Lifetime Testing in Perovskite Solar Cells

Jixian Xu; Oleksandr Voznyy; Riccardo Comin; Xiwen Gong; Grant Walters; Min Liu; Pongsakorn Kanjanaboos; Xinzheng Lan; Edward H Sargent

doi:10.1002/adma.201505630

Crosslinked Remote-Doped Hole-Extracting Contacts Enhance Stability under Accelerated Lifetime Testing in Perovskite Solar Cells

Adv Mater. 2016 Apr 13;28(14):2807-15. doi: 10.1002/adma.201505630. Epub 2016 Jan 29.

Authors

Jixian Xu¹, Oleksandr Voznyy¹, Riccardo Comin¹, Xiwen Gong¹, Grant Walters¹, Min Liu¹, Pongsakorn Kanjanaboos^{1

2}, Xinzheng Lan¹, Edward H Sargent¹

Affiliations

¹ Department of Electrical and Computer Engineering, University of Toronto, 35 St George Street, Toronto, Ontario, M5S 1A4, Canada.
² Department of Materials Science and Engineering, Mahidol University, 272 Rama 6 Road, Bangkok, 10400, Thailand.

PMID: 26823381
DOI: 10.1002/adma.201505630

Abstract

A crosslinked hole-extracting electrical contact is reported, which simultaneously improves the stability and lowers the hysteresis of perovskite solar cells. Polymerizable monomers and crosslinking processes are developed to obviate in situ degradation of the under lying perovskite. The crosslinked material is band-aligned with perovskite. The required free carrier density is induced by a high-work-function metal oxide layer atop the device, following a remote-doping strategy.

Keywords: electronic polymers; hole transport layers; hysteresis; perovskites; solar cells.