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Alex Chen, a fifth-year Ph.D. candidate, is the lead author with Assistant Professor Josh Choi of “Origin of vertical orientation in two-dimensional metal halide perovskites and its effect on photovoltaic performance.” The article appeared in Nature Communications, a publication of the premier scientific journal Nature. Other students in Choi’s lab who contributed to the article are Michelle Shiu, Jennifer Ma, Matthew Alpert, Depei Zhang, Benjamin Foley, Detlef-M. Smilgies and Seung-Hun.