Wang R, Li M, Ma Z, He Z, Dong Y, Zhang Y, Xu Z, Su G, Tan Z. Hexachlorotriphosphazene-assisted buried interface passivation for stable and efficient wide-bandgap perovskite solar cells.
Chem Commun (Camb) 2023;
59:6255-6258. [PMID:
37139609 DOI:
10.1039/d3cc01100c]
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Abstract
Large open-circuit voltage (Voc) 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 Voc loss. The PerSCs include a [Cs0.22FA0.78Pb(I0.85Br0.15)3]0.97(MAPbCl3)0.03 (1.67 eV) absorber and deliver an efficiency of 21.47% and a Voc of 1.21 V (Voc loss of 0.46 V). More importantly, the unencapsulated PerSCs maintain 90% of the initial efficiency after aging 500 h in N2.
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