DataVXJournal of Information DisplayPaper
journal article·2020-07-02Open access

Easily reproducible top-emitting organic light-emitting devices for microdisplays adapted to aluminum contact from the standard CMOS processes

Qin Xue, Guohua Xie

Journal of Information Display· Volume 21· Issue 3
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Source abstract

Abstract

Organic light-emitting devices (OLEDs) on the silicon backplanes processed via the standard foundry complementary metal–oxide-semiconductor (CMOS) processes were developed with the state-of-the-art electrical doping technology to meet the optical and electrical requirements, resulting in high luminance (over 5000 cd/m2) for the green emissive OLED microdisplay. The unavoidable oxidized aluminium contact after the CMOS processes on the top layer of the pixel was found to significantly increase the driving voltage of the device (up to 1 V at 100 cd/m2 luminance). To aid in the extraction of the accurate device parameters for setting up an equivalent circuit, the reference top-emitting OLEDs without bottom metal contacts were deposited directly on interconnection-metal-only silicon substrates from the CMOS foundry. The distribution of the AlOx of the top-layer metal contact on silicon (the bottom anode of OLEDs) was confirmed by the X-ray photoelectron spectroscopy (XPS) depth profiles.
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Research context

Energy storageElectronic materials

OpenAlex topics: Organic Light-Emitting Diodes Research · Thin-Film Transistor Technologies · Green IT and Sustainability

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Affiliations

Department of Physical Science and Technology, Central China Normal University, Wuhan, People’s Republic of China

Sauvage Center for Molecular Sciences, Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan, People’s Republic of China

Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, People’s Republic of China

Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates (South China University of Technology), Guangzhou, People’s Republic of China

Funding

National Natural Science Foundation of China · the Large-Scale Instrument and Equipment Sharing Fund of Wuhan University · the Open Fund of Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology

References

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