Trend of Perovskite Solar Cells: Dig Deeper to Build Higher

摘要

Using solar energy efficiently to produce electricity has been the subject of intensive research because of the rapid increase of global energy demand and the need to reduce the emission of greenhouse gases from electricity generation by fossil fuels. Breakthroughs are needed to produce low-cost, high-efficiency solar cells with good durability. Organic − inorganic hybrid halide perovskites (e.g., CH 3 NH 3 PbI 3 or MAPbI 3 ) have rapidly become a focal point of the photovoltaic (PV) community as a promising next-generation PV technol- ogy. The certified efficiency of a single-junction perovskite solar cell (PSC) has reached 20.1% after only a few years of active research. Despite this remarkable progress, many fundamental questions still remain that need to be addressed at both the material and device levels. During the 2015 Material Research Society (MRS) Spring Meeting (April 6 − 10, 2015, San Francisco, CA), hundreds of scientists and engineers gathered at Symposium C − Perovskite Solar Cells  to discuss recent progress, challenges, and future directions for PSCs. 1 This symposium, which lasted for 4 days (April 7 − 10), hosted about 75 talks and 75 posters. Four posters were selected for the Symposium ’ s Best Poster Awards (Ahn C3.04, Kaltenbrumer C3.25, Yu C10.10, and Bokdam C10.33). The enormous success of this symposium is re fl ecting the growing number of research groups interested in PSCs, clearly highlighting the consolidation of this new technology. In this Guest Commentary, we summarize -based on the presentations and discussions at the symposium -our views on the recent trend and various issues that researchers have been studying to continue the successful development of PSCs.