photoluminescence quantum efficiency yields (λmax = 540 nm, Φ = 71.2% for Ir-TN3T and λmax = 513 nm, Φ = 91.0% for Ir-TN4T, respectively) in CH2Cl2 solution at room temperature. Organic light emitting diodes (OLEDs) with single-emitting-layer and double-emitting-layer structures exhibit good performances. Particularly, device D2 with a double-emitting-layer structure based on a Ir-TN4T complex of 8 wt% doped concentration
具有2',6'-双(三氟甲基)-2,3'-联吡啶(TN 3 T)和2',6'的两个新的铱(III)环金属化配合物(Ir-TN 3 T和Ir-TN 4 T)-双(三氟甲基)-2,4'-联吡啶(TN 4 T)作为环金属化配体和2-(4,5-二苯基-4 H -1,2,4-三唑-3-基)苯酚(dptp)随着辅助配体的发展。这两种复合物的绿色荧光体具有高的光致发光量子效率的产率(λ最大= 540纳米,Φ = 71.2为%的Ir-TN 3 Ť和λ最大= 513纳米,Φ室温下,分别在CH 2 Cl 2溶液中的Ir-TN 4 T分别为91.0%)。具有单发光层和双发光层结构的有机发光二极管(OLED)表现出良好的性能。特别地,具有基于8wt%掺杂浓度的Ir-TN 4 T配合物的双层发射层结构的器件D2表现出优异的性能,具有94.29 cd A -1的峰值电流效率和峰值外部量子效率(EQE max)的31.
generate an efficient deep blue emission. In this work, we prepared a series of deep blue TADF emitters based on trifluoromethyl featuring phenyl and N-heterocyclic rings as electron-withdrawing units and carbazole as electron-donating moieties. Efficient organic light-emitting diodes (OLEDs) utilizing these emitters have a deep blue emission and a high externalquantumefficiency of up to 20.4%. These
Two iridium(iii) complexes with high photoluminescence quantum efficiency and electron mobility were synthesized and highly efficient OLEDs (ηc,max of 101.96 cd A−1 and ηEQE,max of 31.6% for Ir1; ηc,max of 99.97 cd A−1 and ηEQE,max of 30.5% for Ir2) were fabricated with low efficiency roll-off ratios.
合成了两种高光致发光量子效率和电子迁移率的铱(III)配合物,并制备了高效的OLEDs(Ir1的最大电流效率(ηc,max)为101.96 cd A−1,最大外部量子效率(ηEQE,max)为31.6%;Ir2的最大电流效率(ηc,max)为99.97 cd A−1,最大外部量子效率(ηEQE,max)为30.5%),其效率滚降率低。