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Single-crystalline hole-transporting layers for efficient and stable organic light-emitting devices.
Ye, Gao-Da; Ding, Ran; Li, Su-Heng; Ni, Lei; Dai, Shu-Ting; Chen, Nian-Ke; Liu, Yue-Feng; Guo, Runda; Wang, Lei; Li, Xian-Bin; Xu, Bin; Feng, Jing.
Affiliation
  • Ye GD; State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, 130012, Changchun, China.
  • Ding R; State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, 130012, Changchun, China. dingran@jlu.edu.cn.
  • Li SH; State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, 130012, Changchun, China.
  • Ni L; State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, 130012, Changchun, China.
  • Dai ST; State Key Laboratory of Supermolecular Structures and Materials, The Institute of Theoretical Chemistry, Jilin University, 2699 Qianjin Street, 130012, Changchun, China.
  • Chen NK; State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, 130012, Changchun, China.
  • Liu YF; State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, 130012, Changchun, China.
  • Guo R; Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, 430074, Wuhan, China.
  • Wang L; Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, 430074, Wuhan, China.
  • Li XB; State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, 130012, Changchun, China.
  • Xu B; State Key Laboratory of Supermolecular Structures and Materials, The Institute of Theoretical Chemistry, Jilin University, 2699 Qianjin Street, 130012, Changchun, China.
  • Feng J; State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, 130012, Changchun, China. jingfeng@jlu.edu.cn.
Light Sci Appl ; 13(1): 136, 2024 Jun 07.
Article in En | MEDLINE | ID: mdl-38849359
ABSTRACT
Efficient charge-carrier injection and transport in organic light-emitting devices (OLEDs) are essential to simultaneously achieving their high efficiency and long-term stability. However, the charge-transporting layers (CTLs) deposited by various vapor or solution processes are usually in amorphous forms, and their low charge-carrier mobilities, defect-induced high trap densities and inhomogeneous thickness with rough surface morphologies have been obstacles towards high-performance devices. Here, organic single-crystalline (SC) films were employed as the hole-transporting layers (HTLs) instead of the conventional amorphous films to fabricate highly efficient and stable OLEDs. The high-mobility and ultrasmooth morphology of the SC-HTLs facilitate superior interfacial characteristics of both HTL/electrode and HTL/emissive layer interfaces, resulting in a high Haacke's figure of merit (FoM) of the ultrathin top electrode and low series-resistance joule-heat loss ratio of the SC-OLEDs. Moreover, the thick and compact SC-HTL can function as a barrier layer against moisture and oxygen permeation. As a result, the SC-OLEDs show much improved efficiency and stability compared to the OLEDs based on amorphous or polycrystalline HTLs, suggesting a new strategy to developing advanced OLEDs with high efficiency and high stability.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Light Sci Appl Year: 2024 Document type: Article Affiliation country: Country of publication:
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Light Sci Appl Year: 2024 Document type: Article Affiliation country: Country of publication: