Efficient hole-blocking layer-free planar halide perovskite thin-film solar cells

• DOI: 10.1038/ncomms7700
• Publication Date: 2015-03-23T12:57:09Z
• Authors: Weijun Ke; Guojia Fang; Jiawei Wan; Hong Tao; Qin Liu; Liangbin Xiong; Pingli Qin; Jing Wang; Hongwei Lei; Guang Yang; Minchao Qin; Xingzhong Zhao; Yanfa Yan
• Keywords: Open-circuit voltage; Ultraviolet; Tin oxide; Perovskite solar cell

Efficient lead halide perovskite solar cells use hole-blocking layers to help collection of photogenerated electrons and achieve high open-circuit voltages. Here, we report the realization efficient grown directly on fluorine-doped tin oxide-coated substrates without using any layers. With ultraviolet–ozone treatment substrates, a planar Au/hole-transporting material/CH3NH3PbI3-xClx/substrate cell processed by solution method has achieved power conversion efficiency over 14% an voltage 1.06 V measured under reverse scan. The is as that our best reference with TiO2 layer. Besides treatment, find involving Cl in synthesis another key for realizing Our results suggest may not be ultimate interfacial material achieving high-performance cells. Lead allow separate positive negative charge carriers high-operation authors demonstrate avoid this extra