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Jiang, Bing‐Huang; Gao, Zhen‐Jie; Lung, Chien‐Yu; Shi, Zhong‐En; Du, He‐Yun; Su, Yu‐Wei; Shih, Hui‐Shan; Lee, Kun‐Mu; Hung, Hsin‐Huai; Chan, Choon Kit; Chen, Chih‐Ping; Wong, Ken‐Tsung
Advanced functional materials, 05/2024, Letnik: 34, Številka: 19Journal Article
The passivation of perovskite interfacial defects by the electron transport layer (ETL) has emerged as an effective strategy for enhancing the performance of perovskite solar cells (PSCs). Dithieno2,3‐d:2′,3′‐d′thieno3,2‐b:3′,2′‐b′dipyrrole (DTPT)‐based acceptor‐donor‐acceptor (A–D–A) molecules composed of coplanar heteroacene as electron‐donating core end‐capped with various electron‐accepting moieties are designed and examined as ETL modifiers for PSCs. Employing PCBM:DTPTCY as the ETL results in passivation perovskite defects, facilitation energy alignment at the ETL/perovskite interface, and enhancement of carrier transport efficiency. The optimized blended ETL‐based Cs0.18FA0.82Pb(I0.8Br0.2)3 p‐i‐n PSC exhibit performances of 37.2% and 39.9% under TL84 and 3000K LED (1000 lux), respectively. The DTPTCY‐based device demonstrates remarkable stability, retaining 87% of its initial power conversion efficiency (PCE) after 30 days of storage in a 40% relative humidity (RH) ambient air environment without any encapsulation, surpassing the control device, which retains only 67% of its original PCE. These findings underscore the potential of A–D–A‐type molecule‐based interface modification to enhance passivation and contact properties, ultimately leading to high‐efficiency and stable PSCs. Remarkable results are attained in indoor Perovskite Solar Cells, achieving an impressive efficiency of 39.9% (3000K LED (1000 lux)) through the application of an A–D–A‐type molecule for defect passivation within the electron transport layer.
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in: SICRIS
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