Year: 2025
Type: article
Abstract: Perovskite solar cells have demonstrated significant performance advancements over the past decade, characterized by their low‐cost fabrication and compatibility with both rigid and flexible substrates. Despite their potential, challenges such as long‐term instability and the toxicity of lead in high‐performance devices hinder their commercialization. Recently, the perovskite‐inspired material Cu2AgBiI6 (CABI) is explored as a light absorber due to its promising optoelectronic properties. However, its wide bandgap and difficulties in producing high‐quality films limit its photovoltaic performance. In this study, hypophosphorous acid (H3PO2) is introduced to the CABI precursor solution, generating in situ silver nanoparticles that enhance light absorption through localized surface plasmon resonance. The incorporation of H3PO2 improved the crystallinity and surface morphology of CABI films while reducing defect states. Solvent vapor annealing is further employed to optimize the film quality. As a result, the optimal CABI solar cell achieved a power conversion efficiency of 2.22%, a fourfold increase over the pristine film (0.55%). Additionally, the CABI device demonstrated an efficiency of 5.66% under 1000 lux 6000 K indoor illumination, showcasing its potential for powering Internet of Things devices. This strategy is further validated in the CuAgBiI5 system, offering a pathway to enhance the performance of perovskite‐inspired solar cells.
Source: Advanced Functional Materials
Authors: Qi Zhang, Liang Tao, Shuting Ma, Xu Jiang, Jie Xu, Jianwei Su, Jian Kang, Huajie Yin, Shan Chen
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
Awards: G3304664200, G3441758741, G7079691538
OpenAlex ID: W4409769487