Emergence of colloidal quantum well-based optoelectronics
Wenhui Fang, Junhong Yu, Shaolin Liao, Huayu Gao, Xianbo Li, Baiquan Liu
Abstract
In the realm of optoelectronic materials, two-dimensional colloidal quantum wells (CQWs) have recently risen as a highly promising candidate for optoelectronics thanks to their outstanding properties. Those include the pronounced quantum confinement effect, exceptional photoluminescence quantum efficiency, tunable color emission, extremely narrow emission half-widths, significant optical gain coefficients, reduced Auger recombination rates, and enhanced photostability. Here, we highlight the emergence of CQW-based optoelectronic devices and their applications. This paper begins by revealing the fundamental concepts underlying CQW-based optoelectronics, including an overview of CQW materials and the design principles of optoelectronic devices. Then, it shifts focus to the state-of-the-art applications of CQWs in the field of optoelectronics, elucidating their unique characteristics, potentials, and challenges in various technologies such as light-emitting diodes, lasers, luminescent solar concentrators, solar cells, and photodetectors. Finally, CQW-based integrated applications are presented. This work would provide insights for the development of advanced CQW-based optoelectronic technologies.