High-performance quasi-2D perovskite light-emitting diodes: from materials to devices

• 作者: Li Zhang Changjiu Sun Tingwei He Yuanzhi Jiang Junli Wei Yanmin Huang Mingjian Yuan
• 来源期刊: 光：科学与应用（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: Reviews
• 页码范围: 516-541
• 页数: 26页
• 语种: 英文

摘要

Quasi-two-dimensional (quasi-2D) perovskites have attracted extraordinary attention due to their superior semiconducting properties and have emerged as one of the most promising materials for next-generation lightemitting diodes (LEDs). The outstanding optical properties originate from their structural characteristics. In particular, the inherent quantum-well structure endows them with a large exciton binding energy due to the strong dielectricand quantum-confinement effects; the corresponding energy transfer among different n-value species thus results in high photoluminescence quantum yields (PLQYs), particularly at low excitation intensities. The review herein presents an overview of the inherent properties of quasi-2D perovskite materials, the corresponding energy transfer and spectral tunability methodologies for thin films, as well as their application in high-performance LEDs. We then summarize the challenges and potential research directions towards developing high-performance and stable quasi-2D PeLEDs. The review thus provides a systematic and timely summary for the community to deepen the understanding of quasi-2D perovskite materials and resulting LED devices.