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

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

doi:10.3788/fgxb20194011.1334

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

Synthesis and Properties of Materials | 更新时间：2020-08-12

- Relationship Between π-conjugated Bridge and Photophysical Properties of Blue Light-emitting Fluorescent Materials with Twisting A-π-D-π-A Configuration
- Chinese Journal of Luminescence Vol. 40, Issue 11, Pages: 1334-1347(2019)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China(61775155,61605138, 61705156,51503022,61705026,U1663229);Shanxi Science and Technology Innovation Key Team(201601D021043)
- DOI：10.3788/fgxb20194011.1334
  CLC： O482.31
- Received：24 June 2019，
  
  Revised：28 July 2019，
  
  Published：05 November 2019
- 稿件说明：
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卢国婧, 廖小青, 李璐等. 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[J]. 发光学报, 2019,40(11): 1334-1347

LU Guo-jing, LIAO Xiao-qing, LI Lu etc. Relationship Between π-conjugated Bridge and Photophysical Properties of Blue Light-emitting Fluorescent Materials with Twisting A-π-D-π-A Configuration[J]. Chinese Journal of Luminescence, 2019,40(11): 1334-1347
卢国婧, 廖小青, 李璐等. 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[J]. 发光学报, 2019,40(11): 1334-1347 DOI： 10.3788/fgxb20194011.1334.

LU Guo-jing, LIAO Xiao-qing, LI Lu etc. Relationship Between π-conjugated Bridge and Photophysical Properties of Blue Light-emitting Fluorescent Materials with Twisting A-π-D-π-A Configuration[J]. Chinese Journal of Luminescence, 2019,40(11): 1334-1347 DOI： 10.3788/fgxb20194011.1334.

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-共轭桥，设计并合成了一系列基于扭曲A--D--A构型的蓝色荧光材料（CzPA-B-FMP，CzPA-F-FMP，CzPA-DF-FMP），并研究-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-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-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。

Abstract

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--D--A configuration were designed and synthesized

in which 4-(9H-carbazol-9-yl)benzeneamine(CzPA) as electron donor unit and trifluoromethylphenyl (FMP) as electron acceptor unit. To investigate the relationship between -conjugated bridge and photophysical properties

the benzene

9'-dioctyl-9H-fluorene and di(9

9'-dioctyl-9H-fluorene) are introduced as -conjugated bridge between CzPA and FMP

which are named as CzPA-B-FMP

CzPA-F-FMP

CzPA-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 of -conjugated bridge between CzPA and FMP

which can improve the fluorescent quantum efficiency of these materials and external quantum efficiency of blue light OLED. But

too longer -conjugated units will also deteriorate photophysical properties for bigger intermolecular conjugating effect.

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references

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

DOI：10.3788/fgxb20194011.1334

摘要

Abstract

关键词

Keywords

references