Fang Zeng, Zhenhuang Su, Weiyu Kong, Feng Li, Yuhang Liang, Xingmo Zhang, Tao Wang, Lin Zhang, Taoyuze Lv, Runkai Liu, Xingyu Gao, Jun Huang, Xudong Yang, Rongkun Zheng
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引用次数: 0
Abstract
Two-dimensional (2D) metal halide perovskites are renowned for their tunable optoelectronic properties and superior stability compared to their three-dimensional counterparts. However, their efficiency in photovoltaic devices has been hampered due to the disordered alignment of quantum wells and a tendency for in-plane growth. Herein, we proposed a de-templated crystallization strategy to control the crystallization kinetics of 2D perovskites via developing a stable intermediate phase in two-step deposition. By precisely adjusting the chemical interactions in the precursor solutions and driving the crystallization process, we successfully eliminate the templated in-plane growth near the liquid-air interface and promote the formation of highly out-of-plane orientated crystals, with the grain size exceeding 5 µm and carrier lifetime increased by four folds. The optimized 2D perovskite solar cell achieves a high-power conversion efficiency (PCE) of 21.16% and a short-circuit current of 23.71 mA cm-2. Additionally, the devices demonstrate remarkable stability, with a PCE decrease of less than 5% after exposure to 65±10% humidity for 1100 hours, operation at 85°C for 1077 hours, or continuous illumination for 1045 hours.
期刊介绍:
Energy & Environmental Science, a peer-reviewed scientific journal, publishes original research and review articles covering interdisciplinary topics in the (bio)chemical and (bio)physical sciences, as well as chemical engineering disciplines. Published monthly by the Royal Society of Chemistry (RSC), a not-for-profit publisher, Energy & Environmental Science is recognized as a leading journal. It boasts an impressive impact factor of 8.500 as of 2009, ranking 8th among 140 journals in the category "Chemistry, Multidisciplinary," second among 71 journals in "Energy & Fuels," second among 128 journals in "Engineering, Chemical," and first among 181 scientific journals in "Environmental Sciences."
Energy & Environmental Science publishes various types of articles, including Research Papers (original scientific work), Review Articles, Perspectives, and Minireviews (feature review-type articles of broad interest), Communications (original scientific work of an urgent nature), Opinions (personal, often speculative viewpoints or hypotheses on current topics), and Analysis Articles (in-depth examination of energy-related issues).