Raikwar Manish Mannulal, Kim Seung Chan, Sun Jinwon, Chu Changwoong, Lee Jun Yeob
School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi 440-746, Republic of Korea.
Materials Research Team, Display Research Center, Samsung Display, Yongin, Gyeonggi 17102, Republic of Korea.
ACS Appl Mater Interfaces. 2023 Aug 30;15(34):40809-40816. doi: 10.1021/acsami.3c08099. Epub 2023 Aug 16.
A novel bipolar host architecture was investigated to improve the external quantum efficiency (EQE) of green phosphorescent organic light-emitting diodes (PhOLEDs). The host was developed by incorporating carbazole as a hole-transport unit and fused rigid benzo[4',5']imidazo[2',1':2,3]imidazo[4, 5, 1-]carbazole () as a new electron transport unit. The primary goal of the -based host design was to achieve a high triplet energy and bipolar charge transport characteristics. The green PhOLEDs fabricated using the new and carbazole-based host demonstrated a high EQE of 26.6% due to their high triplet energy and good bipolar charge transporting characteristics.
为提高绿色磷光有机发光二极管（PhOLEDs）的外量子效率（EQE），研究了一种新型双极主体结构。该主体通过引入咔唑作为空穴传输单元和稠合刚性苯并[4',5']咪唑并[2',1':2,3]咪唑并[4,5,1-]咔唑（）作为新型电子传输单元来开发。基于的主体设计的主要目标是实现高三线态能量和双极电荷传输特性。使用新型和咔唑基主体制造的绿色PhOLEDs由于其高三线态能量和良好的双极电荷传输特性，表现出26.6%的高EQE。
