Highly Efficient Three Primary Color Organic Single‐Crystal Light‐Emitting Devices with Balanced Carrier Injection and Transport. (15th February 2017)

• Record Type: Journal Article
• Authors: Ding, Ran; Feng, Jing; Dong, Feng‐Xi; Zhou, Wei; Liu, Yang; Zhang, Xu‐Lin; Wang, Xue‐Peng; Fang, Hong‐Hua; Xu, Bin; Li, Xian‐Bin; Wang, Hai‐Yu; Hotta, Shu; Sun, Hong‐Bo
• Is Part Of: Advanced functional materials. Volume 27:Number 13(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-02-15
• Subjects: molecular doping -- multilayered structures -- organic single‐crystal‐based OLEDs -- three primary colors; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201604659
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract : Organic single crystals have a great potential in the field of organic optoelectronics because of their advantages of high carrier mobility and high thermal stability. However, the application of the organic single crystals in light‐emitting devices (OLEDs) has been limited by single‐layered structure with unbalanced carrier injection and transport. Here, fabrication of a multilayered‐structure crystal‐based OLED constitutes a major step toward balanced carrier injection and transport by introducing an anodic buffer layer and electron transport layer into the device structure. Three primary color single‐crystal‐based OLEDs based on the multilayered structure and molecular doping exhibit a maximum luminance and current efficiency of 820 cd cm −2 and 0.9 cd A −1, respectively, which are the highest performance to date for organic single‐crystal‐based OLEDs. This work paves the way toward high‐performance organic optoelectronic devices based on the organic single crystals. Abstract : Efficient and bright organic single‐crystal‐based organic light‐emitting devices (OLEDs) are achieved by the multilayered structure to improve carrier injection and transport. Three primary colors' OLEDs based on the multilayered structure and molecular doping exhibit a maximum luminance and current efficiency of 820 cd cm −2 and 0.9 cd A −1, respectively, which is the highest performance to date for the organic single‐crystal‐based OLEDs.