Performance enhancement of single layer organic light-emitting diodes using chlorinated indium tin oxide as the anode

Zhenxuan Wu; Zhenlin Yang; Kai Xue; Chunchun Fei; Fei Wang; MinNan Yan; Hongmei Zhang; Dongge Ma; Wei Huang

doi:10.1039/c7ra13355c

Performance enhancement of single layer organic light-emitting diodes using chlorinated indium tin oxide as the anode

RSC Adv. 2018 Mar 21;8(20):11255-11261. doi: 10.1039/c7ra13355c. eCollection 2018 Mar 16.

Authors

Zhenxuan Wu¹, Zhenlin Yang¹, Kai Xue¹, Chunchun Fei¹, Fei Wang¹, MinNan Yan¹, Hongmei Zhang¹, Dongge Ma², Wei Huang^{1

3

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Affiliations

¹ Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT) Nanjing 210023 P. R. China iamhmzhang@njupt.edu.cn.
² Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology Guangzhou 510640 P. R. China.
³ Key Laboratory for Organic Electronics and Information Displays, Jiangsu Key Laboratory for Biosensors, Nanjing University of Posts & Telecommunications (NUPT) Nanjing 210023 P. R. China.
⁴ Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications (NUPT) Nanjing 210023 P. R. China.

Abstract

Effective green single-layer organic light-emitting diodes (OLEDs) are reported with fac-tris(2-phenylpyridine)iridium [Ir(ppy)₃] as a dopant and chlorinated indium tin oxide (Cl-ITO) as a transparent anode. The work function of the chlorinated ITO is manipulated to be ∼5.3 eV from ∼4.7 eV for bared ITO. The improvement in anode workfunction allows the direct hole injection into the HOMO of the phosphorescent dopant. As a result, the green phosphorescent OLEDs with simple single layers can deliver a current efficiency (CE) and external quantum efficiency (EQE) as high as 33.48 cd A^-1 and 10.1%, respectively.