The cover image illustrates crystal growth of poly‐crystalline halide perovskite thin films, being composed of an inorganic framework with corner‐sharing octahedral PbX 6 4− cages and organic A + cations. The formation of seed clusters and sequential growth can be thermodynamically regulated by altering interfacial energy and supersaturation degree in perovskite precursor solution to govern total Gibbs free energy change. Details are in the article by Da‐Yeong Lee, Yu‐Na Lee, and Hui‐Seon Kim . image
A Sun, study studied this question.