摘要
光子晶体(PC)是一种在介观尺度下具有周期性自组装结构的材料,其最显著的特征是具有光子禁带(PBG)。波长位于光子禁带内的光不能透过光子晶体而被反射回来,因而光子晶体具有优异的光调控能力。对量子点材料发光强度和寿命的调控是该领域的研究热点之一。本文以二氧化硅(SiO_(2))胶体球作为光子晶体组装单元,通过电泳沉积的方式制备了厚度可控的光子晶体薄膜。采用热注入方法制备了钙钛矿量子点(CsPbX_(3),X=Cl,Br,I)。光子晶体薄膜经表面疏水改性后,将钙钛矿量子点嵌入在光子晶体周期性结构中,该结构具有结构显色和荧光的双重性能。本工作发现光子晶体结构对蓝、红、绿三色钙钛矿量子点可获得4.5倍、19倍、11倍的荧光增强,在显示、防伪、光电探测器、发光二极管等领域具有潜在的应用价值。
Photonic crystal(PC)is a kind of material with periodic self-assembly structure at meso⁃scopic scale.The most significant characteristic of photonic crystal is the photonic band gap(PBG).The light whose wavelength is in the photonic band gap cannot be reflected back through the photon⁃ic crystal,so the photonic crystal has excellent light regulation ability.The modulation of lumines⁃cence intensity and lifetime of quantum dot materials is one of the research hotspots in this field.In this paper,silicon dioxide(SiO_(2))colloidal spheres were used as photonic crystal assembly units to prepare photonic crystal thin films with controllable thickness by electrophoretic deposition.Perovskite quantum dots(CsPbX_(3),X=Cl,Br,I)were prepared by thermal injection.After surface hydrophobicity modification,perovskite quantum dots are embedded in the periodic structure of pho⁃tonic crystal,which has the effect of dual-mode display.In this work,the fluorescence enhance⁃ment of perovskite quantum dots by photonic crystal structure is realized,which has potential appli⁃cation value in display,anti-counterfeiting,photodetectors,light-emitting diodes and other fields.
作者
李金铎
刘志福
任瑛琪
侯京山
刘玉峰
房永征
LI Jin-duo;LIU Zhi-fu;REN Ying-qi;HOU Jing-shan;LIU Yu-feng;FANG Yong-zheng(School of Materials Science and Engineering,Shanghai Institute of Technology,Shanghai 201418,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2022年第6期807-816,共10页
Chinese Journal of Luminescence
基金
国家自然科学基金(52172150)
上海市光探测材料与器件工程中心(20DZ2252600)资助项目。
关键词
光子晶体
钙钛矿量子点
荧光增强
电泳沉积
photonic crystals
perovskite quantum dots
fluorescence enhancement
electrophoretic deposition
