Jun Fang, Dongxu Lin, Guanshui Xie, Sibo Li, Huan Li, Xin Wang, Daozeng Wang, Nuanshan Huang, Haichen Peng, Lin Gan, Yanzhuo Zhu, Sisi He, Longbin Qiu
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引用次数: 0
Abstract
The two-step sequential deposition is promising for control of the crystallization and growth of compact perovskite by separating the deposition of PbI2 and organic salt. Furthermore, thermal evaporated-PbI2 has the potential for textured surfaces. However, the performance of inverted perovskite solar cells by the two-step sequential deposition lags far behind the counterpart fabricated by the one-step deposition from a precursor solution. Here, we found insight into anion exchange in the sequential thermal evaporation-solution process for high-quality perovskite films. The exchange process promotes mass transport and penetration of organic compounds into evaporated PbI2, optimizes phase purity, and enables a homogeneous halide distribution with inhibited phase segregation. The devices fabricated by evaporated-PbI2 as the bottom layer following the solid-solution interdiffusion process yield a champion efficiency of 24.43% (certified 24.18%), which is the highest inverted perovskite solar cells based on evaporated PbI2. Incorporating the scalable blading process for solid-solution interdiffusion, the device exhibits an efficiency up to 22.22%. The resulting conformable and scalable cells maintain 95% of the initial efficiency after operation for 682 h under one sun illumination. This anion-exchange strategy provides instructive significance for future large-area and monolithic perovskite-silicon tandem cells.
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).