Back Cover: Synergy Effect of a π‐Conjugated Ionic Compound: Dual Interfacial Energy Level Regulation and Passivation to Promote Voc and Stability of Planar Perovskite Solar Cells (Angew. Chem. Int. Ed. 11/2022). Issue 11 (11th February 2022)

• Record Type: Journal Article
• Authors: Liu, Xiaoyuan; Min, Jihyun; Chen, Qian; Liu, Tuo; Qu, Geping; Xie, Pengfei; Xiao, Hui; Liou, Juin‐Jei; Park, Taiho; Xu, Zong‐Xiang
• Is Part Of: Angewandte Chemie international edition. Volume 61:Issue 11(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-02-11
• Subjects: Defect Passivation -- Energy Level Alignment -- Perovskite Solar Cells -- Thermal Stability -- π-Conjugated Ionic Compound; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202201861
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract : Perovskites The π ‐conjugated ionic compound QAPyBF4 was used as a perovskite modulator in the Research Article by Juin‐Jei Liou, Taiho Park, Zong‐Xiang Xu, and co‐workers (e202117303) . Experimental investigations showed that p‐type conjugated cations [QAPy] 2+ adsorb on the perovskite surface with under‐coordinated Pb cations and highly electronegative [BF4 ] − anions enriched at the SnO2 interface. This spontaneous diffusion effect of cation and anion improves the band alignment at two adjacent perovskite interfaces and reduces recombination losses.