Affiliation:
1. Engineering Research Center of Advanced Rare Earth Materials (Ministry of Education) Department of Chemistry Tsinghua University Beijing 100084 China
2. Department of Physics Tsinghua University Beijing 100084 China
Abstract
AbstractThe growth of high‐quality halide perovskite single crystals is imperative to study their intrinsic physical properties and to realize high‐performance optoelectronic devices. Here, a room‐temperature solvent evaporation‐induced crystallization (RTSEIC) method is reported based on Le Chatelier's principle, which provides a general strategy to grow halide perovskite single crystals including 3D, 2D, 1D, and 0D, and either hybrid or all‐inorganic halide perovskites. Taking 2D n‐BA2PbBr4 (n‐BA = butylammonium) as an example, the room‐temperature crystallization kinetics is demonstrated. The centimeter‐sized n‐BA2PbBr4 single crystals exhibit an extremely small full width at half maximum (FWHM) of 0.024° in (0 0 2) plane rocking curve and a small trap density of 2.74 × 1010 cm−3. The superior crystalline quality endows the n‐BA2PbBr4 single crystal ultraviolet photodetectors with recorded performance among reported n‐BA2PbBr4 ultraviolet photodetectors, demonstrating a detectivity reaching 1.8 × 1013 Jones, a fast response time of 55 µs and a high on‐off ratio of 104. The low‐cost, simple, general, and efficient RTSEIC method is anticipated to promote the blossoming of halide perovskites single crystals.
Funder
National Natural Science Foundation of China
China Postdoctoral Science Foundation
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry