Abstract
Taking advantage of the high uniformity of two-step process, a novel all-solution method to fabricate organic-inorganic perovskite solar cells with enhanced short-circuit current was introduced in this thesis. The device structure was ITO/PEDOT:PSS/Perovskite/PCBM/Al. Firstly, using CH3NH3PbI3 as active layer, the effects of the ratio of MAI to PbI2 on the photovoltaic parameters of the device were analyzed. Secondly, the use of CH3NH3PbCl3 as an interlayer was explored and was found to enhance greatly the short-circuit current. With this modified process, the device fabrication processes were optimized and the best power conversion efficiency of 10.04% with a short-circuit current density of 19.98 mA/cm2 were achieved. With its low processing temperature and high stability, our modified process may be a promising approach for the large-area production of perovskite solar cells. Keywords: perovskite solar cell, solution process, two-step, CH3NH3PbCl