Cadmium doping for improving the efficiency and stability of carbon-based CsPbIBr2 all-inorganic perovskite solar cells. (10th May 2021)

• Record Type: Journal Article
• Authors: Wang, Rufeng; Zhang, Haiming; Han, Siqi; Wu, Yizhi; Hu, Zhanning; Zhang, Guixiang; Liu, Haoxuan; He, Qingchen; Zhang, Xianjing
• Is Part Of: New journal of chemistry. Volume 45:Number 20(2021)
• Page Start: 9243
• Page End: 9250
• Publication Date: 2021-05-10
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d0nj06317g
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Cadmium ions are doped into perovskite lattice for enhancing the efficiency and stability of carbon-based CsPbIBr2 all-inorganic perovskite solar cells. Abstract : The all-inorganic perovskite CsPbIBr2 is a promising material in the photovoltaic (PV) field due to its acceptable optical bandgap and favorable air-stable phase stability. However, the conventional solution-processed poor-coverage thin films make it a challenging task to prepare high-performance solar cells. In this work, we introduce cadmium ions (Cd 2+ ) into CsPbIBr2 perovskite and investigate how this doping treatment would affect the PV performance of the carbon-based CsPbIBr2 all-inorganic perovskite solar cells (FTO/SnO2 /CsPbIBr2 /carbon). We found that the crystallinity and morphology of CsPbIBr2 thin films are significantly improved after Cd 2+ doping, leading to improved light absorption and carrier transportation with reduced carrier recombination in perovskites. The optimized device achieved the highest efficiency of 6.79% in comparison with 4.36% for the device without Cd 2+ doping, an increase of 56% in efficiency. Meanwhile, the optimized device with Cd 2+ doping exhibited enhanced stability (76% of initial efficiency after 10 hours) in ambient atmosphere. Furthermore, the whole fabrication process of these devices is performed at low temperatures, not more than 160 °C. The present work provides a simple and economical strategy for the fabrication of low-temperature-processed CsPbIBr2 solar cells and the improvement in their performance.