Solvent-assisted growth of organic-inorganic hybrid perovskites with enhanced photovoltaic performances

Photoelectric conversion efficiency enhancement of the emerging highly efficient, low cost organic-inorganic perovskite solar cells, which is considered as a promising candidate in solar energy industry, has received great attention. And, it is investigated that the device performance can be significantly improved simply by a convenient morphology controlling approach aiming at obtaining uniform and high coverage of perovskite. However, reliable means to prepare high-quality perovskite layer remains to be a big challenge. In this work, we proposed a novel, simple and efficient method in optimizing the morphology of CH3NH3PbI3 perovskite films. Utilizing this excellent rapid fabrication process, our devices present an average power conversion efficiency of 9.65% with remarkable reproducibility, which is about 42% higher with respect to devices produced by regular protocol. This work sheds a light on enhancing performance of the state-of-the-art solar cells by exploring novel methods to prepare photoactive layers of high-quality. (C) 2015 Elsevier B.V. All rights reserved.