基于扭曲A-π-D-π-A构型的蓝色荧光材料的π-共轭桥与光物理特性间的关系（英文）  

Relationship Between π-conjugated Bridge and Photophysical Properties of Blue Light-emitting Fluorescent Materials with Twisting A-π-D-π-A Configuration

作　　者：卢国婧 廖小青[2] 李璐[2] 郭臻 高龙 苗艳勤[1] 李洁[1] 郭鹍鹏[1] 许慧侠[1] 王华[1] LU Guo-jing;LIAO Xiao-qing;LI Lu;GUO Zhen;GAO Long;MIAO Yan-qin;LI Jie;GUO Kun-peng;XU Hui-xia;WANG Hua(Key Laboratory of Interface Science and Engineering in Advanced Materials,Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China;Co-innovation Center for Micro/Nano Optoelectronic Materials and Devices,Research Institute for New Materials Technology,Chongqing University of Arts and Science,Chongqing 402160,China;College of Material Science&Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学新材料界面科学与工程教育部重点实验室,山西太原030024 [2]重庆文理学院新材料技术研究所微纳米光电材料与器件联合创新中心,重庆402160 [3]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《发光学报》2019年第11期1334-1347,共14页Chinese Journal of Luminescence

基　　金：Supported by National Natural Science Foundation of China(61775155,61605138,61705156,51503022,61705026,U1663229);Shanxi Science and Technology Innovation Key Team(201601D021043)~~

摘　　要：蓝色荧光材料在作为有机发光器件(OLED)的蓝光发光层材料方面具有很大的商业应用潜力。本文将4-(9H-咔唑-9-基)苯胺(CzPA)作为电子给体单元、三氟甲基苯基(FMP)作为电子受体单元,通过在CzPA和FMP之间分别引入苯,9,9’-二辛基-9H-芴和双(9,9′-二辛基-9H-芴)作为π-共轭桥,设计并合成了一系列基于扭曲A-π-D-π-A构型的蓝色荧光材料(CzPA-B-FMP,CzPA-F-FMP,CzPA-DF-FMP),并研究π-共轭桥与材料光物理性质之间的关系。通过对材料的相关光物理性质以及电荷转移特性的详细比较,可以分析得出:CzPA和FMP之间的π-共轭桥长度的增加可以增强激发态的局部激发特性,进而提高这些材料的荧光量子效率和器件的外量子效率。但是,过长的π-共轭桥将导致更大的分子间共轭效应,不利于材料光物理性质的优化。Blue light-emitting fluorescent materials have great commercial application potential as blue-light emitter for organic light-emitting devices(OLEDs).In this work,a series of blue light-emitting fluorescent materials with twisting A-π-D-π-A configuration were designed and synthesized,in which 4-(9 H-carbazol-9-yl)benzeneamine(CzPA)as electron donor unit and trifluoromethylphenyl(FMP)as electron acceptor unit.To investigate the relationship betweenπ-conjugated bridge and photophysical properties,the benzene,9,9’-dioctyl-9 H-fluorene and di(9,9’-dioctyl-9 H-fluorene)are introduced asπ-conjugated bridge between Cz PA and FMP,which are named as Cz PA-B-FMP,Cz PA-F-FMP,Cz PA-DF-FMP,respectively.By comparing photophysical properties in detail,it can be concluded that combining with charge transfer characteristic,the local excitation characteristic of excited state can be enhanced with increasing length ofπ-conjugated bridge between Cz PA and FMP,which can improve the fluorescent quantum efficiency of these materials and external quantum efficiency of blue light OLED.But,too longerπ-conjugated units will also deteriorate photophysical properties for bigger intermolecular conjugating effect.

关 键 词：OLED 蓝色发光 荧光材料 电荷转移 外量子效率 

分 类 号：O482.31[理学—固体物理]