One-step synthesis of epitaxial 3D/2D metal halide perovskite heterostructures

作者：Zhu, Zhaohua; Zeng, Shaoyu; Chen, Qian; Yang, Lei; Wei, Cong; Chen, Bo; Yu, Haidong; Li, Hai; Zhang, Jian^*; Huang, Xiao^*

来源：Chemical Communications, 2022, 58(99): 13775-13778.

DOI：10.1039/d2cc05150h

• TRANSFORMATION
• EFFICIENCY

Facile and scalable synthesis of perovskite heterostructures with well-controlled heterointerfaces remains challenging. Herein, we developed a simple one-step solution method to prepare 3D/2D CsPbBr3/PEA(2)PbBr(4) perovskite heterostructures with a well-defined epitaxial structure in the gram scale. The formation mechanism was detailed by using in situ time-resolved photoluminescence (PL) spectroscopy analysis. In addition, a series of 3D/2D epitaxial heterostructures were also prepared by changing the organic cations or halogen anions. Due to the effective charge separation and transfer, photodetectors based on the type-II 3D/2D CsPbBr3/PEA(2)PbBr(4) heterostructures showed up to 120 times higher photoresponsivities and 50 times higher on/off ratios compared to devices based on single component perovskites.

• 单位
  西北工业大学