Yadav Abhishek, Ahmad Shahab
Advanced Energy Materials Lab, Department of Physics, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342037, India.
ACS Appl Mater Interfaces. 2024 Aug 21;16(33):43134-43155. doi: 10.1021/acsami.4c07170. Epub 2024 Aug 8.
2D metal halide perovskites (MHPs), mainly the studied Ruddlesden-Popper (RP) and Dion-Jacobson (DJ) phases, have gained enormous popularity as optoelectronic materials owing to their self-assembled multiple quantum well structures, tunable semiconducting properties, and improved structural stability compared to their bulk 3D counterparts. The performance of polycrystalline thin film devices is limited due to the formation of defects and trap states. However, as studied so far, single crystal-based devices can provide a better platform to improve device performance and investigate their fundamental properties more reliably. This Review provides the first comprehensive report on the emerging field of RP and DJ perovskite single crystals and their use in visible light photodetectors of varied device configurations. This Review structurally summarizes the 2D MHP single crystal growth methods and the parameters that control the crystal growth process. In addition, the characterization techniques used to investigate their crystal properties are discussed. The review further provides detailed insights into the working mechanisms as well as the operational performance of 2D MHP single crystal photodetector devices. In the end, to outline the present status and future directions, this Review provides a forward-looking perspective concerning the technical challenges and bottlenecks associated with the developing field of RP and DJ perovskite single crystals. Therefore, this timely review will provide a detailed overview of the fast-growing field of 2D MHP single crystal-based photodetectors as well as ignite new concepts for a wide range of applications including solar cells, photocatalysts, solar H production, neuromorphic bioelectronics, memory devices, etc.
二维金属卤化物钙钛矿（MHP），主要是研究较多的Ruddlesden-Popper（RP）相和Dion-Jacobson（DJ）相，由于其自组装的多量子阱结构、可调节的半导体特性以及与体相三维对应物相比更高的结构稳定性，作为光电器件材料受到了广泛关注。多晶薄膜器件的性能因缺陷和陷阱态的形成而受到限制。然而，到目前为止的研究表明，基于单晶的器件可以提供一个更好的平台来提高器件性能，并更可靠地研究其基本特性。本综述首次全面报道了RP和DJ钙钛矿单晶这一新兴领域及其在各种器件结构的可见光光电探测器中的应用。本综述从结构上总结了二维MHP单晶的生长方法以及控制晶体生长过程的参数。此外，还讨论了用于研究其晶体性质的表征技术。该综述进一步深入探讨了二维MHP单晶光电探测器器件的工作机制以及运行性能。最后，为了概述现状和未来方向，本综述对与RP和DJ钙钛矿单晶发展领域相关的技术挑战和瓶颈提供了前瞻性观点。因此，这篇及时的综述将详细介绍基于二维MHP单晶的光电探测器这一快速发展的领域，并为包括太阳能电池、光催化剂、太阳能制氢、神经形态生物电子学、存储器件等在内的广泛应用激发新的概念。
