研究目的
To demonstrate a white organic light-emitting diode (OLED) microdisplay with a tandem structure for augmented reality (AR) and mixed reality (MR) devices, focusing on achieving high luminance and efficiency with a well-controlled white emission spectrum.
研究成果
A white OLED microdisplay with a tandem structure was successfully demonstrated, achieving a white emission spectrum through well-controlled cavity design and reduced operating voltage for CMOS circuit driving. The fabricated OLED microdisplay had a 0.7 inch size and an SXGA resolution.
研究不足
The study acknowledges the challenge of obtaining a broad band emission spectrum with increased total organic layer thickness and the trade-off between electron injection property and cathode transmittance.
1：Experimental Design and Method Selection:
The study involved designing a white OLED microdisplay with a tandem structure, focusing on optical simulation for cavity design and the use of p- and n-doped organic layers to lower operating voltage.
2：Sample Selection and Data Sources:
The backplanes of the OLED microdisplay panels were fabricated on 8-inch Si wafers by a commercial foundry company.
3：List of Experimental Equipment and Materials:
Equipment included a vacuum thermal evaporator for deposition, a source-measure unit (Keithley-238), and a spectroradiometer (CS-2000, Konica Minolta). Materials included organic materials, top cathode metals, and encapsulation materials.
4：Experimental Procedures and Operational Workflow:
The process involved cleaning substrates, depositing organic materials and metals, encapsulation, and module packaging.
5：Data Analysis Methods:
The current density-voltage characteristics, luminance, and electroluminescence spectra were measured and analyzed.
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