Fabrication and Characterization of High Efficiency Perovskite Solar Cells

New generation of solar cells are ideal candidates for fulfilling the worldwide renewable energy demand. Among them, perovskite solar cells, also known as hybrid organic–inorganic perovskite solar cells, have become one of the most attractive photovoltaic technologies, with easy solution fabrication process and high conversion efficiencies. Here, we report on the fabrication of high efficiency planar heterojunction formamidinium lead triiodide perovskite solar cells by a one step solvent engineering method. Conversion efficiency up to16.6% was obtained for our optimized fabrication process. Despite very high conversion efficiency achieved in short time span, perovskite photovoltaic future commercial development remain hindered by the devices instability under certain processing and environmental conditions. To comprehend these instability issues, we used electron microscopy based techniques to probe the effect of annealing and relative humidity (2% to 40%) on the structural properties of formamidinium lead triiodide perovskite thin films. Optical and electrical properties studies were also carried out to understand the impact of processing on the final device performance.

For further information please contact Renu Sharma, 301-975-2418, renu.sharma [at] nist.gov (renu[dot]sharma[at]nist[dot]gov)