Low trap-state density and long carrier diffusion in organolead trihalide perovskite single crystals

• DOI: 10.1126/science.aaa2725
• Publication Date: 2015-01-29T19:19:54Z
• Authors: Dong Shi; Valerio Adinolfi; Riccardo Comin; Mingjian Yuan; Erkki Alarousu; Andrei Buin; Yin Chen; Sjoerd Hoogland; Alexander Rothenb...; Khabiboulakh Katsiev; Yaroslav Losovyj; Xin Zhang; Peter A. Dowben; Omar F. Mohammed; Edward H. Sargent; Osman M. Bakr
• Keywords: Trihalide; Trap (plumbing)

The fundamental properties and ultimate performance limits of organolead trihalide MAPbX3 (MA = CH3NH3(+); X Br(-) or I(-)) perovskites remain obscured by extensive disorder in polycrystalline films. We report an antisolvent vapor-assisted crystallization approach that enables us to create sizable crack-free single crystals with volumes exceeding 100 cubic millimeters. These large enabled a detailed characterization their optical charge transport characteristics. observed exceptionally low trap-state densities on the order 10(9) 10(10) per centimeter (comparable best photovoltaic-quality silicon) carrier diffusion lengths 10 micrometers. results were validated density functional theory calculations.