Tetraalkyl-substituted zinc phthalocyanines used as anode buffer layers for organic light-emitting diodes

doi:10.1088/1674-1056/ab5933

Abstract Two soluble tetraalkyl-substituted zinc phthalocyanines (ZnPcs) for use as anode buffer layer materials in tris(8-hydroxyquinoline)aluminum (Alq₃)-based organic light-emitting diodes (OLEDs) are presented in this work. The hole-blocking properties of these ZnPc layers slowed the hole injection process into the Alq₃ emissive layer greatly and thus reduced the production of unstable cationic Alq₃ (Alq₃⁺) species. This led to the enhanced brightness and efficiency when compared with the corresponding properties of OLEDs based on the popular poly-(3, 4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) buffer layer. Furthermore, because of the high thermal and chemical stabilities of these ZnPcs, a nonaqueous film fabrication process was realized together with improved charge balance in the OLEDs and enhanced OLED lifetimes.

Keywords: organic light-emitting diode anode buffer layer metal phthalocyanine solution process

Received: 15 July 2019
Revised: 15 November 2019
Accepted manuscript online:

PACS:	73.40.Qv	(Metal-insulator-semiconductor structures (including semiconductor-to-insulator))
	73.90.+f	(Other topics in electronic structure and electrical properties of surfaces, interfaces, thin films, and low-dimensional structures)

Fund: Project supported by the Shenzhen Personal Maker Project, China (Grant No. GRCK2017082316173208), the Shenzhen Overseas High-level Talents Innovation Plan of Technical Innovation, China (Grant No. KQJSCX20180323140712012), and the Special Funds for the Development of Strategic Emerging Industries in Shenzhen, China (Grant No. JCJY20170818154457845).

Corresponding Authors: Jiaju Xu, Zongxiang Xu
E-mail: xujj@sustech.edu.cn;xuzx@sustech.edu.cn

Cite this article:

Qian Chen(陈潜), Songhe Yang(杨松鹤), Lei Dong(董磊), Siyuan Cai(蔡思源), Jiaju Xu(许家驹), Zongxiang Xu(许宗祥) Tetraalkyl-substituted zinc phthalocyanines used as anode buffer layers for organic light-emitting diodes 2020 Chin. Phys. B 29 017302

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Tetraalkyl-substituted zinc phthalocyanines used as anode buffer layers for organic light-emitting diodes

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