Journal
ACS MATERIALS LETTERS
Volume 4, Issue 5, Pages 987-994Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsmaterialslett.2c00163
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Funding
- National Natural Science Foundation of China [61935016, 92056119, 22175118]
- National Key Research and Development Program of China [2021YFA0715502]
- Science and Technology Commission of Shanghai Municipality [20JC1415800, 20XD1402500]
- Analytical Instrumentation Center, SPST, ShanghaiTech University [SPST-AIC10112914]
- Centre for High-Resolution Electron Microscopy (C.EM), SPST, ShanghaiTech University [EM02161943]
- HighPerformance Computing (HPC) Platform of ShanghaiTech University
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In this study, high-quality and large-size two-dimensional perovskite single crystals were successfully synthesized using a specific solvent. These crystals were then used to fabricate a photodetector and heterojunction.
High-quality and large-size perovskite single crystals are emerging aspromising materials for optoelectronic devices including solar cells, high energyradiation sensing, and visible light detection. Low-dimensional perovskite structures have aroused great attention recently for its unique properties such as large carriermobility and anisotropic properties. However, there are lack of methods to growhigh-quality and large-size low-dimensional perovskite single crystals. Herein, byusing ethylene glycol as solvent to increase the coordination between precursor and solutes, the nucleation barrier is increased allowing slow nucleation and crystal growth. As a result, large-size two-dimensional (2D) tin perovskite single crystals with smooth surface are synthesized for the first time. A photodetector is fabricatedbased on this single crystal and it shows linear-polarized light sensing. The theoretical simulation is explored to explain theanisotropic properties of 2D perovskite structures. In the end, a heterojunction is fabricated based on the epitaxy growth of 2Dlead perovskite on the 2D tin perovskite single crystal.
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