Jeon Ye-Jin, Lee Sehyun, Kang Rira, Kim Jueng-Eun, Yeo Jun-Seok, Lee Seung-Hoon, Kim Seok-Soon, Yun Jin-Mun, Kim Dong-Yu
School of Materials Science and Engineering, Department of Nanobiomaterials and Electronics, Heeger Center for Advanced Materials, Gwangju Institute of Science and Technology (GIST), 261 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, Republic of Korea.
School of Materials Science and Chemical Engineering, Kunsan National University, Kunsan, Chonbuk 753-701, Republic of Korea.
Sci Rep. 2014 Nov 7;4:6953. doi: 10.1038/srep06953.
Perovskite solar cells (PeSCs) have been considered one of the competitive next generation power sources. To date, light-to-electric conversion efficiencies have rapidly increased to over 10%, and further improvements are expected. However, the poor device reproducibility of PeSCs ascribed to their inhomogeneously covered film morphology has hindered their practical application. Here, we demonstrate high-performance PeSCs with superior reproducibility by introducing small amounts of N-cyclohexyl-2-pyrrolidone (CHP) as a morphology controller into N,N-dimethylformamide (DMF). As a result, highly homogeneous film morphology, similar to that achieved by vacuum-deposition methods, as well as a high PCE of 10% and an extremely small performance deviation within 0.14% were achieved. This study represents a method for realizing efficient and reproducible planar heterojunction (PHJ) PeSCs through morphology control, taking a major step forward in the low-cost and rapid production of PeSCs by solving one of the biggest problems of PHJ perovskite photovoltaic technology through a facile method.
钙钛矿太阳能电池（PeSCs）被认为是具有竞争力的下一代电源之一。迄今为止，光电转换效率已迅速提高到10%以上，并且有望进一步提升。然而，由于钙钛矿太阳能电池的薄膜形态覆盖不均匀导致器件重现性较差，这阻碍了它们的实际应用。在此，我们通过将少量N-环己基-2-吡咯烷酮（CHP）作为形态控制器引入N，N-二甲基甲酰胺（DMF）中，展示了具有卓越重现性的高性能钙钛矿太阳能电池。结果，实现了与真空沉积方法所获得的高度相似的高度均匀的薄膜形态，以及10%的高功率转换效率（PCE）和0.14%以内的极小性能偏差。本研究代表了一种通过形态控制实现高效且可重现的平面异质结（PHJ）钙钛矿太阳能电池的方法，通过一种简便的方法解决了PHJ钙钛矿光伏技术的最大问题之一，在低成本和快速生产钙钛矿太阳能电池方面向前迈出了重要一步。
