Journal
CHEMICAL COMMUNICATIONS
Volume 54, Issue 9, Pages 1049-1052Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cc07154j
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Funding
- National Science Foundation of China [91333109, 21671115]
- National Key Basic Research Program of China [2013CB632900]
- Tsinghua University Initiative Scientific Research Program [20131089202, 20161080165]
- Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics [KF201516]
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With the aid of formic acid, CH3NH3PbI3 single crystal of 9 mm in length was directly harvested within 3 days via a nonseeded solution temperature-lowering (STL) method. It showed a record-narrow full width at half maximum of 13 arcsec for the high-resolution X-ray rocking curve, a low trap-state density of 3.1 x 10(9) cm(-3), a high carrier mobility of 162 cm(2) V-1 s(-1) and high moisture stability. The addition of formic acid could suppress the oxidation of iodide ions in a conventional STL process, resulting in rapid growth of high-quality CH3NH3PbI3 single crystals.
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