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Journal Article
Strategic use of dopants and device structure optimization for enhanced color gamut and efficiency in organic light-emitting diodes microdisplay applications
- Authors
- Hyunsu Cho, Dae Hyun Ahn, Sukyung Choi, Gi Heon Kim, Chul Woong Joo, Chan-mo Kang, Jin-Wook Shin, Kukjoo Kim, Byoung-Hwa Kwon, Chunwon Byun, Nam Sung Cho, Young Jae An, Jin Sun Kim, Hyoc Min Youn
- Issue Date
- 2025-02
- Citation
- Optical Materials, v.159, pp.1-7
- ISSN
- 0925-3467
- Publisher
- Elsevier BV
- Language
- English
- Type
- Journal Article
- Abstract
- This study achieves enhanced color purity and efficiency in organic light-emitting diode (OLED) microdisplays. Considering the crucial role of the emitting material selection, particularly concerning color filters (CFs), four green and two red dopants were evaluated based on their photoluminescence spectra, with adjustments for a balanced RGB spectrum in white OLEDs. The impact of the device structure on the color gamut was explored by considering variations in the cavity length and its influence on the emission spectra. The results highlighted the importance of proper OLED design before applying CFs for increased color purity, indicating that the red, green, and blue emission spectra can be tailored through CFs, thereby affecting the color coordinates and luminance. When the OLED structure was designed to maintain a wide color gamut, the efficiency of OLED devices was influenced by the spectral characteristics of the dopants, even for the same color. In particular, the spectral characteristics of red dopants had a greater impact on efficiency compared to green dopants. Finally, an OLED microdisplay panel was demonstrated, achieving a high color gamut of 130.2% based on the sRGB standard through the strategic selection of dopants and CFs.
- KSP Keywords
- Cavity length, Device structure, Emission spectra, Emitting materials, Material Selection, OLED devices, Photoluminescence spectra, Spectral characteristics, Wide Color Gamut, blue emission, color coordinates
This work is distributed under the term of Creative Commons License (CCL)
(CC BY)
(CC BY)
