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Volume 45 Issue 11
Nov.  2023
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CHANG Cheng, QIAN Fuli, GOU Guoru, TANG Rui, WANG Tilu, GAO Sibo, ZHANG Weichenxi, HE Yangyang, LI Li, YANG Qiming, ZHANG Jie, LIU Yingqi, DUAN Yu, YANG Wenyun, WANG Guanghua. Development of Highly Efficient Tandem White OLEDs[J]. Infrared Technology , 2023, 45(11): 1141-1152.
Citation: CHANG Cheng, QIAN Fuli, GOU Guoru, TANG Rui, WANG Tilu, GAO Sibo, ZHANG Weichenxi, HE Yangyang, LI Li, YANG Qiming, ZHANG Jie, LIU Yingqi, DUAN Yu, YANG Wenyun, WANG Guanghua. Development of Highly Efficient Tandem White OLEDs[J]. Infrared Technology , 2023, 45(11): 1141-1152.
shu

Development of Highly Efficient Tandem White OLEDs

  • Yunnan Olightek Opto-electronic Technology Co., Ltd., Kunming 650223, China

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  • Received Date: May 30, 2023
  • Revised Date: September 19, 2023
    Graphical Abstract
    • Abstract
  • Tandem white OLEDs offer low power consumption, high brightness, and a high color gamut. However, the material and electrical structures of tandem white OLEDs still need to be optimized owing to the outstanding challenges in efficiency, lifetime, and driving voltage. In this study, we focused on the latest research on tandem white OLEDs and summarized the problems in engineering preparation and non-destructive detection method of 3 types of CGLs for high-efficiency tandem white OLEDs. We focused on the latest research on the "all-phosphorescent system, " "harvesting excitons via two parallel channels, " and the "mixed-phosphorescent-TADF system" simultaneously. We summarized the device lifetime problems and discussed structural solutions such as "graded doping" and "four-color mixed-phosphorescent-TADF system." From the aspect of CGL materials and structures in different systems, we reviewed the scheme of lower driving voltage for tandem white OLEDs. Finally, we provided suggestions for improving the materials and structures of tandem white OLEDs.
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