Exciplex formation and electroluminescent absorption in ultraviolet organic light-emitting diodes

被引：15
|
作者：
Zhang Qi [1 ,2 ]
Zhang Hao [1 ,2 ]
Zhang Xiao-Wen [3 ]
Xu Tao [1 ,2 ]
Wei Bin [1 ,2 ]
机构：
[1] Shanghai Univ, Minist Educ, Sch Mat Sci & Engn, Shanghai 200072, Peoples R China
[2] Shanghai Univ, Minist Educ, Key Lab Adv Display & Syst Applicat, Shanghai 200072, Peoples R China
[3] Guilin Univ Elect Technol, Guangxi Key Lab Informat Mat, Guilin 541004, Peoples R China
来源：
CHINESE PHYSICS B | 2015年 / 24卷 / 02期
基金：
中国国家自然科学基金;
关键词：
exciplex; tunable UV emission; electroluminescent absorption; DEVICES; LAYER;
D O I：
10.1088/1674-1056/24/2/024222
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigated the formation of exciplex and electroluminescent absorption in ultraviolet organic light-emitting diodes (UV OLEDs) using different heterojunction structures. It is found that an energy barrier of over 0.3 eV between the emissive layer (EML) and adjacent transport layer facilitates exciplex formation. The electron blocking layer effectively confines electrons in the EML, which contributes to pure UV emission and enhances efficiency. The change in EML thickness generates tunable UV emission from 376 nm to 406 nm. In addition, the UV emission excites low-energy organic function layers and produces photoluminescent emission. In UV OLED, avoiding the exciplex formation and averting light absorption can effectively improve the purity and efficiency. A maximum external quantum efficiency of 1.2% with a UV emission peak of 376 nm is realized.
引用
收藏
页数：6
相关论文
共 50 条
  • [1] Exciplex formation and electroluminescent absorption in ultraviolet organic light-emitting diodes
    张琪
    张浩
    张小文
    徐韬
    魏斌
    Chinese Physics B, 2015, 24 (02) : 257 - 262
  • [2] Exciplex kinetics in nanocrystal organic light-emitting diodes
    Krisztian Kohary
    Journal of Materials Science: Materials in Electronics, 2009, 20 : 10 - 14
  • [3] Exciplex kinetics in nanocrystal organic light-emitting diodes
    Kohary, Krisztian
    JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2009, 20 : 10 - 14
  • [4] Blue emitting exciplex for yellow and white organic light-emitting diodes
    Kavya Rajeev
    CKVipin
    Anjali KSajeev
    Atul Shukla
    Sarah KMMcGregor
    ShihChun Lo
    Ebinazar BNamdas
    KNNarayanan Unni
    Frontiers of Optoelectronics, 2023, 16 (04) : 193 - 205
  • [5] Blue emitting exciplex for yellow and white organic light-emitting diodes
    Kavya Rajeev
    C. K. Vipin
    Anjali K. Sajeev
    Atul Shukla
    Sarah K. M. McGregor
    Shih-Chun Lo
    Ebinazar B. Namdas
    K. N. Narayanan Unni
    Frontiers of Optoelectronics, 16
  • [6] Blue emitting exciplex for yellow and white organic light-emitting diodes
    Rajeev, Kavya
    Vipin, C. K.
    Sajeev, Anjali K.
    Shukla, Atul
    Mcgregor, Sarah K. M.
    Lo, Shih-Chun
    Namdas, Ebinazar B.
    Unni, K. N. Narayanan
    FRONTIERS OF OPTOELECTRONICS, 2023, 16 (01)
  • [7] Organic light-emitting diodes with a spacer enhanced exciplex emission
    Yan, Fei
    Chen, Rui
    Sun, Handong
    Sun, Xiao Wei
    APPLIED PHYSICS LETTERS, 2014, 104 (15)
  • [8] Exciplex hosts for blue phosphorescent organic light-emitting diodes
    Jung, Mina
    Lee, Jun Yeob
    JOURNAL OF INFORMATION DISPLAY, 2020, 21 (01) : 11 - 18
  • [9] Efficient exciplex organic light-emitting diodes with a bipolar acceptor
    Chen, Dongcheng
    Wang, Zhiheng
    Wang, Dan
    Wu, Yuan-Chun
    Lo, Chang-Cheng
    Lien, A.
    Cao, Yong
    Su, Shi-Jian
    ORGANIC ELECTRONICS, 2015, 25 : 79 - 84
  • [10] Recent Advances of Interface Exciplex in Organic Light-Emitting Diodes
    Shao, Jianhua
    Chen, Cong
    Zhao, Wencheng
    Zhang, Erdong
    Ma, Wenjie
    Sun, Yuanping
    Chen, Ping
    Sheng, Ren
    MICROMACHINES, 2022, 13 (02)
12345