Quasi-2D lead halide perovskite gain materials toward electrical pumping laser

Chenyang Zhao,Chuanjiang Qin

doi:10.1515/nanoph-2020-0630

Abstract

Abstract Quasi two-dimensional (2D) lead halide perovskite materials have shown outstanding performance in various photoelectric devices, including perovskite light-emitting diodes (LEDs) and perovskite optical pumping lasers. Due to the structure diversity of bulky organic cation, the photoelectric property for quasi-2D perovskite materials is flexible to be tuned. The spontaneously formed quantum-well structures allow rapid and efficient energy funneling from low-n domains to high-n domains, contributing to high exciton utilization for perovskite LEDs and low threshold for amplified spontaneous emission (ASE) and optical pumping perovskite lasers. Moreover, the hydrophobic bulky organic cations benefit to improve the environmental and operating stability owning to the better moisture tolerance and defects passivation ability. In this review, we will primarily introduce the quasi-2D lead halide perovskite materials from the structure to their optical and electrical properties. Then, we will focus on the advances of optical pumping lasers based on quasi-2D lead halide perovskite materials as gain mediums. Especially, more attention will be paid to perovskite lasers using distributed feedback (DFB) and distributed Bragg reflector (DBR) cavities. Furthermore, the key issues to realize quasi-2D perovskite-based electrical pumping lasers will be discussed.

Highlights

Lead halide perovskite materials have attracted considerable attention for various photoelectric application
We will focus on the advances of optical pumping lasers based on quasi-2D lead halide perovskite materials as gain mediums
The advances for optical pumping lasers based on quasi-2D perovskite as gain medium were presented

Summary

Introduction

Lead halide perovskite materials have attracted considerable attention for various photoelectric application. The first stable continuous-wave (CW) lasing at room-temperature based on quasi 2D perovskite films using DFB optical cavities has been reported by Qin et al, showing the potential for quasi2D-based perovskites achieving electrical pumping lasers in the future [40]. The corresponding threshold current density for perovskite electrical pumping laser diodes will be in the order of at least A cm−2. Under such intense electrical excitation, both Joule heating- and electric-field-induced effects will be much more obvious than in common perovskite LEDs, leading in emission quenching and enhanced laser threshold [41, 42]. Studies on emission behaviors under intense optical and electrical excitation and strategies to reduce Joule heating effect will be presented

Quasi-2D RP lead halide perovskite materials

Optical pumping lasers based on quasi2D perovskite single-crystals

Optical pumping lasers based on quasi2D perovskite thin films

Findings

Conclusion