[2PS-027]
우수논문발표상 응모자Molecular Engineering of PTAA with Carboxylic Acid Groups for Enhanced Interfacial Charge Transfer in Inverted Perovskite Solar Cells
발표자정재우 (아주대학교)
연구책임자김종현 (아주대학교)
Abstract
Efficient charge extraction at the interface between the perovskite and the hole transport layer (HTL) is crucial for high-performance inverted perovskite solar cells (PSCs). However, the conventional poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) suffers from intrinsic hydrophobic surface limit the overall performance of PSCs. In this study, we synthesized a carboxylic acid-functionalized PTAA (CA-PTAA) to improve the interfacial properties. The introduction of carboxylic acid groups enhances the surface wettability of the HTL, promoting the growth of a high-quality perovskite film with minimized interfacial defects. Furthermore, two-side photoluminescence (PL) measurements suggest suppressed defect losses and efficient charge transfer. Consequently, the CA-PTAA-based PSCs achieved a power conversion efficiency (PCE) of 22.77%, compared to the 19.98% of the control device. The molecular engineering of polymeric HTLs is an effective strategy for high-performance inverted PSCs.