Qi Luo, Bowen Li, Chenyu Ju, Hongxin Weng, Hong Zhang, Qihao Dai, Pengfei Liu, Hao Xiong, Kunyuan Zheng, Peng Xiang and Xinyu Tan
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引用次数: 0
Abstract
SnO2-based perovskite solar cells (PSCs) have made tremendous progress, but there's still a lot of room for optimization of the fill factor (FF) and power conversion efficiency (PCE) compared with the short-circuit current density and open-circuit voltage. The FF is strongly related to carrier extraction and transport efficiency. In this study, a simple method for passivating SnO2 by integrating carboxymethyldextran sodium (CMD) into a SnO2 colloidal mixture is presented. It is shown that the addition of CMD can improve the electronic properties of SnO2, reduce the nonradiative recombination, effectively passivate the defects at the buried interface of SnO2 and perovskite, and make the device form a suitable energy level arrangement. As a result, the efficiency of this SnO2-CMD-based device is increased from 23.09% to 24.73%, and the FF is significantly increased to 84.89%, with negligible hysteresis. At a relative humidity of 20–30% and a temperature of 25 °C, the device retains 86% of its original PCE after 1000 hours of storage. This study provides a low-cost, convenient and efficient method for realizing efficient and stable PSCs.
期刊介绍:
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.