Conference Publication
Surface Defect Passivation and Quasi-2D Engineering for High-Efficiency Tin-Lead Perovskite Solar Cells
Author affiliations and roles
- 1Center for Sustainability and Energy Technologies, Chang Gung University, Taoyuan 33302, Taiwan
- 2Department of Chemical and Materials Engineering, National Central University, Taoyua 32001, Taiwan
- 3Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan
- 4Division of Neonatology, Department of Pediatrics, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan
台灣化學工程學會72週年年會 (2025).
Research topic: Perovskite Solar Cells
Conference information
Conference abstract
Conference dates: 2025-11-29 – 2025-11-30
Tainan, Taiwan
Abstract
Tin-lead perovskites offer superior bandgap tunability for achieving higher performance.[1,2] To further improve device efficiency, we systematically explored 2-thiophene ethylammonium chloride (TEACl) to passivate the perovskite surface. Our study found that a 0.50 mg/mL concentration of TEACl provided optimal defect passivation at the perovskite-electron transport layer interface, as confirmed by PL and SCLC measurements which showed reduced non-radiative recombination and improved carrier dynamics. This approach significantly increased the PCE from 18.286% to 20.283%. Moreover, incorporating a quasi-2D structure (PEAI+GASCN) effectively improved bulk film quality by reducing grain boundary defects. This, along with the defect-healing properties of GASCN, led to a peak PCE of 21.602%, accompanied by higher VOC and FF. Despite this, stability tests revealed the need for further optimization of the quasi-2D structure's stability under high-temperature and light stress. Future efforts should focus on enhancing its layered structure and interface stability to realize highly efficient and durable perovskite solar cells.