Organic semiconductor heterojunctions: electrode-independent charge injectors for high-performance organic light-emitting diodes

Yong-Hua Chen; Dong-Ge Ma; Heng-Da Sun; Jiang-Shan Chen; Qing-Xun Guo; Qiang Wang; Yong-Biao Zhao

doi:10.1038/lsa.2016.42

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Organic semiconductor heterojunctions: electrode-independent charge injectors for high-performance organic light-emitting diodes

Original Articles

- Organic semiconductor heterojunctions: electrode-independent charge injectors for high-performance organic light-emitting diodes
- Light: Science & Applications Vol. 5, Issue 2, (2016)
- Affiliations：
  
  1.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  2.Department of Macromolecular Science and Engineering, School of Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
  3.School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710062, China
  4.Luminous! Center of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore
- Author bio：
  
  DG Ma, Email: mdg1014@ciac.ac.cn
- Funds：
- DOI：10.1038/lsa.2016.42
  CLC：
- Published：2016-06，
  
  Published Online：05 November 2016，
  
  Received：23 June 2015，
  
  Revised：21 October 2015，
  
  Accepted：04 November 2015
- Accepted：
Scan QR Code
Chen, Y. H. et al. Organic semiconductor heterojunctions: electrode-independent charge injectors for high-performance organic light-emitting diodes. Light: Science & Applications, 5, e16042 (2016).
DOI：

Chen, Y. H. et al. Organic semiconductor heterojunctions: electrode-independent charge injectors for high-performance organic light-emitting diodes. Light: Science & Applications, 5, e16042 (2016). DOI： 10.1038/lsa.2016.42.

摘要

Abstract

Organic light-emitting diodes (OLEDs) are driven by injected charges from an anode and a cathode. The low and high work function metals are necessary for the effective injection of electrons and holes

respectively. Here

we introduce a fully novel design concept using organic semiconductor heterojunctions (OSHJs) as the charge injectors for achieving highly efficient OLEDs

regardless of the work functions of the electrodes. In contrast to traditional injected charges from the electrodes

the injected charges originate from the OSHJs. The device performance was shown to be significantly improved in efficiency and stability compared to conventional OLEDs. Attractively

the OLEDs based on OSHJs as charge injectors still exhibited an impressive performance when the low work function Al was replaced by air- and chemistry-stable high work function metals

such as Au

and Cu

as the cathode contact

which has been suggested to be difficult in conventional OLEDs. This concept challenges the conventional design approach for the injection of charges and allows for the realization of practical applications of OLEDs with respect to high efficiency

selectable electrodes

and a long lifetime.

关键词

Keywords

charge injectionOLEDsorganic semiconductor heterojunctions

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