What Remains Unexplained about the Properties of Halide Perovskites?. Issue 20 (22nd March 2018) - Egger, David A.
Abstract: The notion that halide perovskite crystals (ABX3, where X is a halide) exhibit unique structural and optoelectronic behavior deserves serious scrutiny. After decades of steady and half a decade of intense research, the question which attributes of these materials are unusual, is discussed, with an emphasis on the identification of the most important remaining issues. The goal is to stimulate discussion rather than to merely present a community consensus. Abstract : Halide perovskites are fascinating crystalline materials for optoelectronic devices and can yield efficient solar cells. A critical review of their structural and optoelectronic characteristics is provided and it is found that they exhibit a unique combination of properties. Based on this notion, open questions about these materials are addressed.