Juan-Pablo Correa-Baena, Massachusetts Institute of Technology … Lead sulphide (PbS) is a traditional direct bandgap semiconductor with high hole mobility. … Szostak3, Edo Waks2, 4, Michael F. Toney5, Ana F. Nogueira5, 3, Bernardo Neves2, … and Ziqi Liang1; 1Fudan University, Shanghai, China; 2Chemical Physics,.

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