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7295977 
Journal Article 
A facile solvothermal growth of single crystal mixed halide perovskite CH3NH3Pb(Br(1-x)Cl(x))3 
Zhang, T; Yang, M; Benson, EE; Li, Z; van de Lagemaat, J; Luther, JM; Yan, Y; Zhu, K; Zhao, Y 
2015 
Yes 
Chemical Communications
ISSN: 1359-7345
EISSN: 1364-548X 
51 
37 
7820-7823 
English 
25853846 
We demonstrate a facile synthetic approach for preparing mixed halide perovskite (CH3NH3)Pb(Br1-xClx)3 single crystals by the solvothermal growth of stoichiometric PbBr2 and [(1 - y)CH3NH3Br + yCH3NH3Cl] DMF precursor solutions. The band gap of (CH3NH3)Pb(Br1-xClx)3 single crystals increased and the unit cell dimensions decreased with an increase in Cl content x, consistent with previous theoretical predictions. Interestingly, the Cl/Br ratio in the (CH3NH3)Pb(Br1-xClx)3 single crystals is larger than that of the precursor solution, suggesting an unusual crystal growth mechanism.