Youtian Mo, Chaoying Guo, Jiansen Guo, Peixin Liu, Xuan Wang, Yufan Cai, Jiaying Chen, Xi Deng, Wenliang Wang and Guoqiang Li
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Carbon nanotubes as hole-selective contacts for high-efficiency full-area GaAs hybrid heterojunction solar cells†
Organic hybrid heterojunction solar cells (HJSCs) based on PEDOT:PSS have attracted significant attention due to their excellent photovoltaic performance. However, the complex carrier transport layer, intricate cell fabrication processes and their high-cost are not proportional to the optimization of cell performance. In this work, we demonstrated a facile annealing process lasting only a few seconds to prepare a high-performance Nafion/PEDOT:PSS (NP) hole transport layer (HTL) and its GaAs hybrid heterojunction. By introducing Nafion, the GaAs/NP HJSC achieves a competitive power conversion efficiency (PCE) of 15.77% thanks to the improved wettability, conductivity and carrier mobility of the HTL. Additionally, a thin and transparent carbon nanotube (CNT) film was introduced as the top electrode for the full-area GaAs/NP hybrid HJSC. The novel design of the NP HTL and full-area light absorption open a new avenue for the widespread application of heterojunction photovoltaic technologies.
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.
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