Gate-Tunable Electron Injection Based Organic Light-Emitting Diodes for Low-Cost and Low-Voltage Active Matrix Displays

Xinning Luan; Jiang Liu; Qibing Pei; Guillermo C Bazan; Huaping Li

doi:10.1021/acsami.7b04035

Gate-Tunable Electron Injection Based Organic Light-Emitting Diodes for Low-Cost and Low-Voltage Active Matrix Displays

ACS Appl Mater Interfaces. 2017 May 24;9(20):16750-16755. doi: 10.1021/acsami.7b04035. Epub 2017 May 15.

Authors

Xinning Luan¹, Jiang Liu^{1

2}, Qibing Pei², Guillermo C Bazan³, Huaping Li¹

Affiliations

¹ Atom Nanoelectronics Inc. 440 Hindry Avenue, Unit E, Inglewood California 90301, United States.
² Department of Materials Science and Engineering, University of California , Los Angeles California 90095, United States.
³ Department of Materials and Chemistry & Biochemistry, University of California , Santa Barbara California 93106, United States.

PMID: 28493663
DOI: 10.1021/acsami.7b04035

Abstract

Low-cost and low-voltage active matrix displays were fabricated by simply patterning gate electrode arrays on a polymer electrolyte (PE)-coated polymer light-emitting diode (PLED). Structurally, a PE capacitor seamlessly stacked on a PLED by sharing a common Al:LiF composite electrode (PEC|PLED). This monolithic integrated organic optoelectronic device was characterized and interpreted as the tunable work function (surface potential) because of the perturbation of accumulated ions on Al:LiF composite electrode by PEC charging and discharging. The modulation of electron injection by the PEC resulted in increases in the electroluminescent brightness, from <100 cd m^-2 to >8000 cd m^-2, and the external quantum efficiency from <0.025% to 2.4%.

Keywords: active matrix displays; composite electrode; gate-tunable electron injection; gated organic light emitting diodes; polymer electrolyte.