Improvement on performance of hybrid CH3NH3PbI3−xClx perovskite solar cells induced sequential deposition by low pressure assisted solution processing. (15th March 2020) - Huang, Lu
Graphical abstract: Highlights: LPSP is a promising process to prepare perovskite thin films with high qualities. LPSP has great effects on the morphology of the perovskite thin films. The highly (1 1 0) oriented CH3 NH3 PbI3−x Clx thin films is achieved by LPSP. Perovskite solar cells with above 17% efficiency can be fabricated by LPSP. Abstract: Controlling perovskite crystal growth plays an important role in improving perovskite solar cell performance. The low pressure assisted solution processing (LPSP) method was developed to improve crystalline quality of thin films and conversion efficiency of devices. It enabled to control removal speed of solvent mixtures unanimously kept in low pressure environment below 1000 Pa. Compared to common pressure condition, it produced highly (1 1 0) oriented CH3 NH3 PbI3−x Clx thin films and devices possessed excellent PCE above 17% by LPSP. So it is effective method to enlarge grain size, optimize roughness of interface and improve carrier mobility.