采用溶液旋涂法在铟锡氧化物(ITO)电极上制备氧化石墨烯(GO)薄膜作为有机太阳能电池(OPVs)的空穴传输层，通过调控旋涂转速优化了氧化石墨烯薄膜的厚度并研究了膜厚对于器件性能的影响规律。在此基础上，通过紫外臭氧(UVO)处理和热处理等方法进一步提升电池器件的性能。结果表明：在紫外臭氧处理和热处理温度为250 ℃时，所得电池器件的效率最优，达到3.16%，接近于使用经典聚(3,4-乙撑二氧噻吩)：聚苯乙烯磺酸(PEDOT:PSS)材料的电池器件水平。这一结果表明具有低成本、可溶液加工以及优异的光透过性等特点的氧化石墨烯会成为一种未来非常有前景的有机太阳能电池的空穴传输层材料。

This work presents the application of graphene oxide (GO) thin films, which are prepared on indium tin oxide (ITO) electrodes by solution spin coating method, as the hole transport layer in organic photovoltaics (OPVs). The thickness of GO films is optimized by adjusting the spin speed, and the effect of GO thickness on the performance of solar cells is investigated. Based on this, the performance of solar cell devices is further improved by using such methods as ultraviolet ozone (UVO) and annealing treatments. The results show that when the temperature of UVO and annealing treatments reach 250 ℃, the OPV devices achieve the highest power conversion efficiency of 3.16%, which is close to the result using a classical poly (3,4-ethylenedioxythiophene): polystyrene sulfonic acid (PEDOT: PSS) material. This result has indicated that GO, with such advantages as low-cost, solution processing, and excellent light transmittance, will become a promising and effective material for hole transport layer in OPVs.