Hexachlorotriphosphazene-assisted buried interface passivation for stable and efficient wide-bandgap perovskite solar cells

Ruyue Wang; Minghua Li; Zongwen Ma; Zhangwei He; Yiman Dong; Yuling Zhang; Zhiyang Xu; Gangfeng Su; Zhan'ao Tan

doi:10.1039/d3cc01100c

Hexachlorotriphosphazene-assisted buried interface passivation for stable and efficient wide-bandgap perovskite solar cells

Chem Commun (Camb). 2023 May 18;59(41):6255-6258. doi: 10.1039/d3cc01100c.

Authors

Ruyue Wang¹, Minghua Li¹, Zongwen Ma¹, Zhangwei He¹, Yiman Dong¹, Yuling Zhang¹, Zhiyang Xu¹, Gangfeng Su¹, Zhan'ao Tan¹

Affiliation

¹ Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China. tanzhanao@mail.buct.edu.cn.

PMID: 37139609
DOI: 10.1039/d3cc01100c

Abstract

Large open-circuit voltage (V_oc) loss is the main issue limiting the efficiency improvement in wide bandgap perovskite solar cells (PerSCs). Herein, a facile buried interface treatment by hexachlorotriphosphazene is developed to suppress the V_oc loss. The PerSCs include a [Cs_0.22FA_0.78Pb(I_0.85Br_0.15)₃]_0.97(MAPbCl₃)_0.03 (1.67 eV) absorber and deliver an efficiency of 21.47% and a V_oc of 1.21 V (V_oc loss of 0.46 V). More importantly, the unencapsulated PerSCs maintain 90% of the initial efficiency after aging 500 h in N₂.