Ilmi Rashid, Li Xiaofang, Al Rasbi Nawal K, Zhou Liang, Wong Wai-Yeung, Raithby Paul R, Khan Muhammad S
Department of Chemistry, Sultan Qaboos University, P. O. Box 36, Al Khod 123, Oman.
State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, People's Republic of China.
Dalton Trans. 2023 Sep 19;52(36):12885-12891. doi: 10.1039/d3dt02147e.
Two new organo-europium complexes (OEuCs) [Eu(btfa)(Bathphen)] (OEuC-1) and [Eu(tta)(Bathphen)] (OEuC-2) where btfa and tta are the anions of 4,4,4-trifluoro-1-phenyl-1,3-butanedione and 2-thenoyltrifluoroacetone while Bathphen = Bathophenanthroline have been synthesized and characterized. Both complexes in the solid state exhibit strong red emissions with photoluminescence quantum yields (PLQYs) of 80% ± 10%. These complexes were tested as dopants in the emitting layer (EML) to fabricate red organic light emitting diodes (R-OLEDs). Through device engineering involving the amalgamation of appropriate host materials and complexes, we have achieved exceptional overall R-OLED performance for an OEuC-2 based device, with maximum current efficiency (CE) = 9.91 cd A, maximum power efficiency (PE) = 9.15 lm W, maximum external quantum efficiency (EQE) = 6.24%, brightness () of 545 cd m, and (CIE) = 0.620, 0.323 at = 10 mA cm.
两种新型有机铕配合物（OEuCs）[Eu(btfa)(Bathphen)]（OEuC - 1）和[Eu(tta)(Bathphen)]（OEuC - 2）已被合成并表征，其中btfa和tta分别是4,4,4 - 三氟 - 1 - 苯基 - 1,3 - 丁二酮和2 - 噻吩甲酰三氟丙酮的阴离子，而Bathphen = 4,7 - 二苯基 - 1,10 - 菲啰啉。两种配合物在固态下均表现出强烈的红色发射，光致发光量子产率（PLQYs）为80%±10%。这些配合物被用作发光层（EML）中的掺杂剂来制备红色有机发光二极管（R - OLEDs）。通过涉及合适主体材料和配合物融合的器件工程，我们实现了基于OEuC - 2的器件卓越的整体R - OLED性能，在电流密度为10 mA cm时，最大电流效率（CE）= 9.91 cd A，最大功率效率（PE）= 9.15 lm W，最大外量子效率（EQE）= 6.24%，亮度（）为545 cd m，色坐标（CIE）= 0.620, 0.323。
