Journal
CHEMICAL COMMUNICATIONS
Volume 51, Issue 37, Pages 7820-7823Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5cc01835h
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Funding
- NSFC [51372151, 21303103]
- U.S. Department of Energy (DOE) [DE-FOA-0000990, DE-AC36-08-GO28308]
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We demonstrate a facile synthetic approach for preparing mixed halide perovskite CH3NH3Pb(Br1-xClx)(3) single crystals by the solvothermal growth of stoichiometric PbBr2 and [(1 - y)CH3NH3Br + yCH(3)NH(3)Cl] DMF precursor solutions. The band gap of CH3NH3Pb(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 CH3NH3Pb(Br1-xClx)(3) single crystals is larger than that of the precursor solution, suggesting an unusual crystal growth mechanism.
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