Hybrid Organic‐Inorganic Perovskites Open a New Era for Low‐Cost, High Efficiency Solar Cells

The ramping solar energy to electricity conversion efficiencies of hybrid organic‐inorganic perovskite solar cells during the last five years have opened new doors to low‐cost solar energy. The record power conversion efficiency has climbed to 19.3% in August 2014 and then jumped to 20.1% in November. In this review, the main achievements for perovskite solar cells categorized from a viewpoint of device structure are overviewed. The challenges and prospects for future development of this field are also briefly presented.