Reinforcing self-assembly of hole transport molecules for stable inverted perovskite solar cells

• DOI: 10.1126/science.adj9602
• Publication Date: 2024-03-14T17:58:59Z
• Authors: Hongcai Tang; Zhichao Shen; Yangzi Shen; Ge Yan; Yanbo Wang; Qifeng Han; Liyuan Han
• Keywords: Anchoring; Indium tin oxide; Self-assembled monolayer

Power conversion efficiencies (PCEs) of inverted perovskite solar cells (PSCs) have been improved by the use a self-assembled monolayer (SAM) hole transport layer. Long-term stability PSCs requires keeping SAM compact under layer during operation. We found that strong polar solvents in precursor desorb if it is anchored on substrates hydrogen-bonded, rather than covalently bonded, hydroxyl groups. used atomic-layer deposition to create an indium tin oxide substrate with fully covalent hydroxyl-covered surface for anchoring, as well trimethoxysilane group exhibited tridentate anchoring substrate. The resulting achieved PCEs 24.8 (certified 24.6) and 23.2% aperture areas 0.08 1.01 square centimeters, respectively. devices retained 98.9 98.2% initial PCE after 1000 hours damp-heat test operation maximum power point tracking at 85°C 1200 standard illumination,