Interfacial Voids Trigger Carbon-Based, All-Inorganic CsPbIBr₂ Perovskite Solar Cells with Photovoltage Exceeding 1.33 V.

ABSTRACT: A novel interface design is proposed for carbon-based, all-inorganic CsPbIBr₂ perovskite solar cells (PSCs) by introducing interfacial voids between TiO₂ electron transport layer and CsPbIBr₂ absorber. Compared with the general interfacial engineering strategies, this design exempts any extra modification layer in final PSC. More importantly, the interfacial voids produced by thermal decomposition of 2-phenylethylammonium iodide trigger three beneficial effects. First, they promote the light scattering in CsPbIBr₂ film and thereby boost absorption ability of the resulting CsPbIBr₂ PSCs. Second, they suppress recombination of charge carriers and thus reduce dark saturation current density (J₀) of the PSCs. Third, interfacial

SUBMITTER: Zhu W 

PROVIDER: S-EPMC7770772 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature