Copper(I) Complexes for Thermally Activated Delayed Fluorescence: From Photophysical to Device Properties

被引：166
作者：
Leitl, Markus J. [1 ]
Zink, Daniel M. [2 ]
Schinabeck, Alexander [1 ]
Baumann, Thomas [2 ]
Volz, Daniel [2 ]
Yersin, Hartmut [1 ]
机构：
[1] Univ Regensburg, Inst Phys Chem, Univ Str 31, D-93053 Regensburg, Germany
[2] Cynora GmbH, Werner von Siemensstr 2-6,Bldg 5110, D-76646 Bruchsal, Germany
来源：
TOPICS IN CURRENT CHEMISTRY | 2016年 / 374卷 / 03期
关键词：
Thermally activated delayed fluorescence; TADF; Phosphorescence; Fluorescence; OLED; Emitter; Triplet harvesting; Singlet harvesting; Emission properties; Electroluminescence; Cu(I); Copper; LIGHT-EMITTING-DIODES; CU-I COMPLEXES; PHOTOINDUCED STRUCTURAL-CHANGE; HIGHLY EFFICIENT; CU(I) COMPLEXES; EXCITED-STATE; EMISSION PROPERTIES; PHOSPHORESCENT EMISSION; LUMINESCENCE PROPERTIES; ELECTROCHEMICAL-CELLS;
D O I：
10.1007/s41061-016-0019-1
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Molecules that exhibit thermally activated delayed fluorescence (TADF) represent a very promising emitter class for application in electroluminescent devices since all electrically generated excitons can be transferred into light according to the singlet harvesting mechanism. Cu(I) compounds are an important class of TADF emitters. In this contribution, we want to give a deeper insight into the photophysical properties of this material class and demonstrate how the emission properties depend on molecular and host rigidity. Moreover, we show that with molecular optimization a significant improvement of selected emission properties can be achieved. From the discussed materials, we select one specific dinuclear complex, for which the two Cu(I) centers are four-fold bridged to fabricate an organic light emitting diode (OLED). This device shows the highest efficiency (of 23 % external quantum efficiency) reported so far for OLEDs based on Cu(I) emitters.
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页数：34
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