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- Title
Enhancing the Efficiency of Indoor Perovskite Solar Cells through Surface Defect Passivation with Coplanar Heteroacene Cored A–D–A‐type Molecules.
- Authors
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
- Abstract
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). Dithieno[2,3‐d:2′,3′‐d′]thieno[3,2‐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.
- Subjects
SOLAR cells; SURFACE passivation; SURFACE defects; PASSIVATION; ELECTRON transport; MOLECULES; PEROVSKITE
- Publication
Advanced Functional Materials, 2024, Vol 34, Issue 19, p1
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.202312819