The latest milestone in WOLED technology for OLED TV and IT displays: Enhancing efficiency, color gamut, and longevity

IF 2.2 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Journal of the Society for Information Display Pub Date : 2025-03-31 DOI:10.1002/jsid.2066

Jung-Keun Kim, Byung-Soo Kim, Ji-Hyang Jang, Hong-Seok Choi, Byung-Gun Ahn, Mi-Young Han, Chang-Je Sung, Ji-Ho Baek, Sung-Joon Bae, Woo-Sup Shin, Hyeon-Woo Lee, Soo-Young Yoon

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引用次数: 0

Abstract

This study introduces recent innovative progress in white organic light emitting diode (WOLED) technology for premium OLED TV and IT displays. By fabricating a four-stack tandem device consisting of red, first blue, green, and second blue devices in sequence from the anode, we could achieve a current efficiency of the WOLED up to 134 cd/A at 10 mA/cm², resulting in enhanced efficiency for red, green, and blue subpixels after transmitting color filters. The new OLED TV implementing the four-stack WOLED technology reached luminance levels of 2,900, 1,000, and 400 nit at the average picture level (APL) of 3%, 25%, and 100%, respectively, and a flash peak luminance of 4,000 nit. Since the four-stack device uses red, green, and blue dopants of saturated color, eliminating yellow green (YG) dopant used for our previous WOLEDs, its color gamut in the Broadcasting service Television (BT)-2020 standard was widen up to 83%. We will explain how to enhance the efficiency and the lifetime in terms of device structure and materials.

Abstract Image

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OLED电视和IT显示器的WOLED技术的最新里程碑：提高效率，色域和寿命

本研究介绍了用于优质OLED电视和IT显示器的白色有机发光二极管（WOLED）技术的最新创新进展。通过从阳极依次制造由红色、第一蓝色、绿色和第二蓝色器件组成的四层串联器件，我们可以实现WOLED在10 mA/cm2下高达134 cd/ a的电流效率，从而在发射彩色滤光片后提高红、绿、蓝子像素的效率。采用四层WOLED技术的新型OLED电视在平均图像水平（APL）分别为3%、25%和100%时，亮度水平分别达到2,900、1,000和400尼特，闪光峰值亮度达到4,000尼特。由于四层器件使用饱和色的红、绿、蓝掺杂剂，消除了我们以前WOLEDs中使用的黄绿色（YG）掺杂剂，因此其在广播业务电视(BT)-2020标准中的色域拓宽了83%。我们将从器件结构和材料方面说明如何提高效率和寿命。

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来源期刊

Journal of the Society for Information Display 工程技术-材料科学：综合

CiteScore

4.80

自引率

8.70%

发文量

审稿时长

3 months

期刊介绍： The Journal of the Society for Information Display publishes original works dealing with the theory and practice of information display. Coverage includes materials, devices and systems; the underlying chemistry, physics, physiology and psychology; measurement techniques, manufacturing technologies; and all aspects of the interaction between equipment and its users. Review articles are also published in all of these areas. Occasional special issues or sections consist of collections of papers on specific topical areas or collections of full length papers based in part on oral or poster presentations given at SID sponsored conferences.