State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University , Beijing 100871, China.
ACS Nano. 2014 Oct 28;8(10):10161-7. doi: 10.1021/nn5029828. Epub 2014 Oct 7.
The past 5 years have witnessed the rise of highly efficient organometal halide perovskite-based solar cells. In conventional perovskite solar cells, compact n-type metal oxide film is always required as a blocking layer on the transparent conducting oxide (TCO) substrate for efficient electron-selective contact. In this work, an interface engineering approach is demonstrated to avoid the deposition of compact n-type metal oxide blocking film. Alkali salt solution was used to modify the TCO surface to achieve the optimized interface energy level alignment, resulting in efficient electron-selective contact. A remarkable power conversion efficiency of 15.1% was achieved under AM 1.5 G 100 mW · cm(-2) irradiation without the use of compact n-type metal oxide blocking layers.
过去 5 年见证了高效的有机金属卤化物钙钛矿太阳能电池的兴起。在传统的钙钛矿太阳能电池中，通常需要在透明导电氧化物 (TCO) 衬底上沉积致密的 n 型金属氧化物薄膜作为阻挡层，以实现高效的电子选择性接触。在这项工作中，展示了一种界面工程方法，可以避免沉积致密的 n 型金属氧化物阻挡层。采用碱金属盐溶液来修饰 TCO 表面，以实现优化的界面能级排列，从而获得高效的电子选择性接触。在不使用致密的 n 型金属氧化物阻挡层的情况下，在 AM 1.5G 100 mW·cm(-2)辐照下，实现了 15.1%的显著功率转换效率。
