Rational Backbone Planarization for Doping-Resilient Polymeric Hole Transport Materials toward Stable and Scalable Perovskite Solar Cells
발표자
김찬혁 (포항공과대학교)
연구책임자
김민준 (경기대학교)
공동저자
김찬혁 (포항공과대학교), 류승운 (아주대학교), 김민준 (경기대학교)
초록
내용
As perovskite solar cells (PSCs) move toward commercialization, stability and large-area processing depend on hole transport material (HTM) doping stability and film uniformity. We report PDVB14, a PTAA-based random copolymer incorporating divinylbenzene (DVB) units via Buchwald–Hartwig C–N coupling. DVB increases backbone planarity and enables more delocalized radical-cation states, while π-aggregation supports charge transport across a broad doping window. As a hole transport layer, PDVB14 shows minimal dopant dependence, reaching a 23.5% champion PCE and retaining 20.6% at 1.0 cm2. It delivers nearly twofold higher thermal, light, and humidity stability than PTAA. Dopant-distribution mapping reveals highly uniform Li profiles across 6 × 6 cm2 films, demonstrating excellent compatibility with scalable processing. This design overcomes PTAA limitations and enables a doping-resilient and scalable polymeric HTM platform for next-generation PSC manufacturing.