Progress of Lead‐Free Halide Double Perovskites

Abstract The field of halide metal perovskite photovoltaics has caught widespread interest in the last decade. This is seen in the rapid rise of power conversion efficiency, which is currently over 23%. It has also stimulated a widespread application of halide metal perovskites in other fields, such as light‐emitting diodes, field‐effect transistors, detectors, and lasers. Despite the fascinating characteristics of the halide metal perovskites, the presence of toxic lead (Pb) in their chemical composition is regarded as one of the major limiting factors preventing their commercialization. Addressing the toxicity issues in these compounds by a careful and strategic replacement of Pb 2+ with other nontoxic…

• NN
  National Natural Science Foundation of China

  Awards: 61674109, 91733301
• NS
  Natural Science Foundation of Jiangsu Province

  Award: BK20170059
• NS
  Natural Science Research of Jiangsu Higher Education Institutions of China