Large‐Area Deep‐Blue Polymer Light‐Emitting Diodes with Well‐Resolved Emission from Planar Conformational Segments Fabricated via Brush Coating

Author:

Xu Man1,Wei Chuanxin1,Wang Shengjie2,Zhang Jingrui1,Ma Jingyao1,Sun Ning2,Sun Lili2,Han Yamin2,Bai Lubing2,Lin Jinyi2ORCID,Qiao Jiawei3,Hao Xiatao3,Xue Wei1,Xie Linghai1,Huang Wei124

Affiliation:

1. State Key Laboratory of Organic Electronics and Information Displays & School of Chemistry and Life Sciences & Institute of Advanced Materials (IAM) Nanjing University of Posts & Telecommunications 9 Wenyuan Road Nanjing 210023 P. R. China

2. Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM) Nanjing Tech University (NanjingTech) 30 South Puzhu Road Nanjing 211816 P. R. China

3. School of Physics State Key Laboratory of Crystal Materials Shandong University Jinan Shandong 250100 P. R. China

4. Frontiers Science Center for Flexible Electronics (FSCFE) Shaanxi Institute of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical Materials and Engineering (SIBME) Northwestern Polytechnical University Xi'an 710072 P. R. China

Abstract

AbstractThe fabrication of large‐area printed deep‐blue polymer light‐emitting diodes (PLEDs) is a prerequisite for solid‐state lighting and flat‐panel displays. However, manufacturing large‐area narrow‐band deep‐blue PLEDs remains a challenging task owing to the difficulties in reducing structural distortions caused by the transitions from the ground to excited states. Herein, large‐area deep‐blue PLEDs with narrow‐band emission from the planar (β) conformational segments of polydiarylfluorenes are fabricated via brush coating. First, large‐area uniform brush‐coated films (4 × 4 cm2) with a relatively smooth morphology are manufactured. They produce strong, stable, and narrow‐band deep‐blue emission (full width at half maximum (FWHM): 29 nm for the 0–0 and 0–1 emission peaks), which results from single β‐conformational segments without a charge transfer state. Therefore, owing to their efficient emission and excellent printing capability, large‐area brush‐coated PLEDs with an emission area of 3 × 3 cm2 and uniform deep‐blue emission (FWHM: 27 nm; CIE chromaticity coordinate: (0.15, 0.10), brightness: 3780 cd m−2) are obtained, and their maximum external quantum efficiency (1.79%) is two times higher than those of the devices containing spin‐coated films. Finally, considering the key role of deep‐blue PLEDs, the fabrication of a preliminary patterned PLED array confirms their potential display applications.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Jiangsu Province

China Postdoctoral Science Foundation

Publisher

Wiley

Subject

Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3