二维材料体系激子上转换发光研究进展(特邀)
Research Progress on Excitonic Upconversion Photoluminescence in Two-Dimensional Materials(Invited)
刘海毅 1齐鹏飞1
作者信息
- 1. 南开大学现代光学研究所,天津 300350;天津市微尺度光学信息技术科学重点实验室,天津 300350
- 折叠
摘要
上转换发光即发射光子能量高于激发光子能量的反斯托克斯过程,可以有效实现能量重整与转化,在生物成像、太阳能电池、光催化及光制冷等方面有着巨大应用前景.作为后摩尔时代战略性新材料,二维材料由于激子偶极矩强度大、线宽窄、无序性低、束缚能高等优势,为实现室温高效激子上转换发光创造了有利条件,近年来吸引了研究者的广泛兴趣.本文首先介绍实现光子上转换的发光机制,包括声子辅助、双光子吸收、俄歇复合等途径,进而梳理基于六方氮化硼、单层过渡金属二硫化物、二维钙钛矿等典型二维材料体系的上转换发光效应研究,同时针对上转换发光效率低的问题,讨论对二维材料上转换发光的调控和增强方式,最后展望二维材料体系激子上转换发光效应的应用前景.
Abstract
Upconversion photoluminescence,an anti-Stokes process in which the emitted photon energy exceeds the excitation photon energy,can effectively achieve energy renormalization and conversion,with great application prospects in fields such as biological imaging,solar cells,photocatalysis,and optical refrigeration.As a strategically important new material in the post-Moore era,two-dimensional materials are crucial in realizing efficient room-temperature excitonic upconversion because of their large dipole moments,narrow linewidths,low disorder,and high exciton binding energies,which have recently attracted extensive research interest.This study first introduces the luminescence mechanisms used to achieve photon upconversion,including phonon-assisted upconversion,two-photon absorption,and Auger recombination.Then,research on upconversion based on two-dimensional material systems,such as hexagonal boron nitride,monolayer transition metal dichalcogenides,and two-dimensional perovskites,is summarized.Modulation and enhancement approaches for upconversion in two-dimensional materials that target low upconversion efficiency are also discussed.Finally,application prospects of excitonic upconversion effects in two-dimensional material systems are envisioned.
关键词
上转换发光/材料/二维材料/激子/非线性光学Key words
upconversion photoluminescence/materials/two-dimensional materials/excitons/nonlinear optics引用本文复制引用
出版年
2024
NETL
NSTL
万方数据