一维光子晶体带边态模式调控的胶体量子点发光性能  

Luminescence Performance of Colloidal Quantum Dots Regulated by Band Edge Mode in One-dimensional Photonic Crystals

作　　者：孟媛 张艳 郭晓阳[1] 吕营[1] 刘星元[1] MENG Yuan;ZHANG Yan;GUO Xiaoyang;LYU Ying;LIU Xingyuan(State Key Laboratory of Luminescence and Applications,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China;Changchun UP Optotech Co.Ltd.,Changchun 130033,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所发光学及应用国家重点实验室,吉林长春130033 [2]中国科学院大学,北京100049 [3]长春奥普光电技术股份有限公司,吉林长春130033

出　　处：《发光学报》2023年第9期1546-1551,共6页Chinese Journal of Luminescence

基　　金：国家自然科学基金(62035013,51973208)。

摘　　要：一维光子晶体(1DPC)是人工构造的周期性光学介电结构,1DPC可以对发光物质进行调控的主要手段包括缺陷态模式调控以及带边态模式调控。1DPC带边态模式中存在较大的光子态密度,因此可以有效地调节材料的发光性能。本文研究了1DPC的带边态模式对在其表面涂附的胶体量子点(CQD)薄膜发光性能的影响。通过使用不同的CQD材料、不同的表面薄膜厚度、不同观测角度等手段对样品的发光特性进行了研究。结果表明,1DPC带边态模式可以有效调控位于表面层的CQD的发光特性,有效地增强CQD薄膜的荧光发射强度、窄化发射线宽。经1DPC带边态模式调控的CQD材料具有更快的荧光辐射跃迁速率。利用1DPC对CQD材料发光性能的影响有助于优化设计的器件结构,从而大幅提升发光器件的性能。One-dimensional photonic crystals(1DPCs)are artificially constructed periodic optical dielectric structures.1DPCs can modulate the luminescent material mainly by defect mode modulation and band-edge mode modulation.1DPC band-edge mode with a large density of photonic states can effectively modulate the luminescent properties of the luminescent material.In this paper,the fluorescence emission of colloidal quantum dot(CQD)materials coated on the surface of 1DPC is studied.By using different QD materials,different surface film thicknesses,and different angles for fluorescence detection,luminescence characteristics of the samples have been investigated.The results show that 1DPC band edge mode can effectively regulate the luminescence characteristics of CQD films located in the surface layer,effectively enhance the fluorescence emission intensity and narrow the emission linewidth.CQD materials controlled by 1DPC band edge mode have faster fluorescence radiation transition rate.The influence of 1DPC on the luminescent properties of CQD materials is helpful to optimize the design of the device structure,so as to greatly improve the performance of the luminescent devices.

关 键 词：带边态模式 胶体量子点 光致发光 角分布 一维光子晶体 

分 类 号：O734[理学—晶体学] O482.31