Literature DB >> 25924007

Above 30% external quantum efficiency in green delayed fluorescent organic light-emitting diodes.

Dong Ryun Lee1, Bo Seong Kim1, Chil Won Lee1, Yirang Im2, Kyoung Soo Yook2, Seok-Ho Hwang1, Jun Yeob Lee2.   

Abstract

Highly efficient green thermally activated delayed fluorescent organic light-emitting diodes with an external quantum efficiency of 31.2% were investigated by using 3-(3-(carbazole-9-yl)phenyl) pyrido[3',2':4,5]furo[2,3-b]pyridine (3CzPFP) derived from carbazole and pyrido[3',2':4,5]furo[2,3-b]pyridine. The host material showed well-matched photoluminescence emission with absorption of the green dopant material, (4s,6s)-2,4,5,6-tetra(9H-carbazol-9-yl)isophthalonitrile (4CzIPN) and harvested all excitons of 4CzIPN. The 3CzPFP:4CzIPN film exhibited high photoluminescence quantum yield of 100%, and the green delayed fluorescence device employing the 3CzPFP host showed high maximum quantum efficiency of 31.2 ± 0.5% at 1% doping after optimization of the device structure.

Entities:  

Keywords:  bipolar host; delayed fluorescence; green fluorescent device; high quantum efficiency; high triplet energy

Year:  2015        PMID： 25924007     DOI： 10.1021/acsami.5b01220

Source DB:  PubMed          Journal:  ACS Appl Mater Interfaces        ISSN： 1944-8244            Impact factor:   9.229


  6 in total

1.  Blue organic light-emitting diodes realizing external quantum efficiency over 25% using thermally activated delayed fluorescence emitters.

Authors:  Takuya Miwa; Shosei Kubo; Katsuyuki Shizu; Takeshi Komino; Chihaya Adachi; Hironori Kaji
Journal:  Sci Rep       Date:  2017-03-21       Impact factor: 4.379

Review 2.  Triazine-Acceptor-Based Green Thermally Activated Delayed Fluorescence Materials for Organic Light-Emitting Diodes.

Authors:  Ramanaskanda Braveenth; Kyu Yun Chai
Journal:  Materials (Basel)       Date:  2019-08-20       Impact factor: 3.623

Review 3.  Recent progress in thermally activated delayed fluorescence emitters for nondoped organic light-emitting diodes.

Authors:  Yi-Zhong Shi; Hao Wu; Kai Wang; Jia Yu; Xue-Mei Ou; Xiao-Hong Zhang
Journal:  Chem Sci       Date:  2022-02-22       Impact factor: 9.825

4.  Red to orange thermally activated delayed fluorescence polymers based on 2-(4-(diphenylamino)-phenyl)-9H-thioxanthen-9-one-10,10-dioxide for efficient solution-processed OLEDs.

Authors:  Praetip Khammultri; Pongsakorn Chasing; Chirawat Chitpakdee; Supawadee Namuangruk; Taweesak Sudyoadsuk; Vinich Promarak
Journal:  RSC Adv       Date:  2021-07-16       Impact factor: 4.036

5.  The Importance of Vibronic Coupling for Efficient Reverse Intersystem Crossing in Thermally Activated Delayed Fluorescence Molecules.

Authors:  Jamie Gibson; Andrew P Monkman; Thomas J Penfold
Journal:  Chemphyschem       Date:  2016-07-26       Impact factor: 3.102

6.  Probe exciplex structure of highly efficient thermally activated delayed fluorescence organic light emitting diodes.

Authors:  Tzu-Chieh Lin; Monima Sarma; Yi-Ting Chen; Shih-Hung Liu; Ke-Ting Lin; Pin-Yi Chiang; Wei-Tsung Chuang; Yi-Chen Liu; Hsiu-Fu Hsu; Wen-Yi Hung; Wei-Chieh Tang; Ken-Tsung Wong; Pi-Tai Chou
Journal:  Nat Commun       Date:  2018-08-06       Impact factor: 14.919
  6 in total

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