Deng Xiaoyu, Wilkes George C, Chen Alexander Z, Prasad Narasimha S, Gupta Mool C, Choi Joshua J
Department of Chemical Engineering, University of Virginia , Charlottesville, Virginia 22904, United States.
Department of Electrical and Computer Engineering, University of Virginia , Charlottesville, Virginia 22904, United States.
J Phys Chem Lett. 2017 Jul 20;8(14):3206-3210. doi: 10.1021/acs.jpclett.7b01466. Epub 2017 Jun 30.
In order to realize high-throughput roll-to-roll manufacturing of flexible perovskite solar cells, low-temperature processing of all device components must be realized. However, the most commonly used electron transporting layer in high-performance perovskite solar cells is based on TiO thin films processed at high temperature (>450 °C). Here, we demonstrate room temperature solution processing of the TiO layer that performs as well as the high temperature TiO layer in perovskite solar cells, as evidenced by a champion solar cell efficiency of 16.3%. Using optical spectroscopy, electrical measurements, and X-ray diffraction, we show that the room-temperature processed TiO is amorphous with organic residues, and yet its optical and electrical properties are on par with the high-temperature TiO. Flexible perovskite solar cells that employ a room-temperature TiO layer with a power conversion efficiency of 14.3% are demonstrated.
为了实现柔性钙钛矿太阳能电池的高通量卷对卷制造，必须实现所有器件组件的低温处理。然而，高性能钙钛矿太阳能电池中最常用的电子传输层是基于在高温（>450°C）下处理的TiO薄膜。在此，我们展示了TiO层的室温溶液处理，其在钙钛矿太阳能电池中的性能与高温TiO层相当，这由16.3%的冠军太阳能电池效率所证明。通过光谱学、电学测量和X射线衍射，我们表明室温处理的TiO是含有有机残留物的非晶态，但其光学和电学性能与高温TiO相当。展示了采用室温TiO层且功率转换效率为14.3%的柔性钙钛矿太阳能电池。
