Wenjing Li, Yongchun Li, Deng Wang, Weichun Pan, Lin Gao, Jihuai Wu, Xugang Guo, Zhang Lan
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Improved photoelectric performance of perovskite solar cells with interfacial dipole molecules
The power conversion efficiency (PCE) and stability of organic-inorganic hybrid perovskite solar cells (PSCs) are limited by the energy level mismatches and substantial defects. Interface engineering is a reliable strategy for solving these problems. Here, we synthesized three small dipole molecules, named PzT-TPA, PzTA-TPA, and PzTA-TPAS, which were introduced into the interface between the perovskite and the hole-transport layers. The advantages of the interface dipole material included regulating the energy band structure, enhancing the built-in electric field and promoting the carrier transport. Compared with the pristine device, the PzTA-TPAS-treated device showed significantly improved photoelectric properties, including an optimal PCE of 25.55%, an impressive open-circuit voltage (VOC) of 1.177 V and an excellent operational stability.
期刊介绍：
Science China Chemistry, co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China and published by Science China Press, publishes high-quality original research in both basic and applied chemistry. Indexed by Science Citation Index, it is a premier academic journal in the field.
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Highlights. Brief summaries and scholarly comments on recent research achievements in any field of chemistry.
Perspectives. Concise reports on thelatest chemistry trends of interest to scientists worldwide, including discussions of research breakthroughs and interpretations of important science and funding policies.
Reviews. In-depth summaries of representative results and achievements of the past 5–10 years in selected topics based on or closely related to the research expertise of the authors, providing a thorough assessment of the significance, current status, and future research directions of the field.
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