Wei Qiong, Zhang Rui, Liu Li, Zhong Xin-Xin, Wang Lei, Li Guang-Hua, Li Fa-Bao, Alamry Khalid A, Zhao Yi
Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P. R. China.
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China.
Dalton Trans. 2019 Aug 14;48(30):11448-11459. doi: 10.1039/c9dt01548e. Epub 2019 Jul 10.
Highly emissive copper(i) halide complexes having thermally activated delayed fluorescence (TADF) have been paid much attention. Here, a series of four-coordinate mononuclear copper(i) halide complexes containing both bi- and mono-phosphine ligands, [CuX(dpmt)(PPh)] (dpmt = 3,4-bis(diphenylphosphino)-2,5-dimethylthiophene, X = I (1), Br (2) and Cl (3)), were synthesized, and their molecular structures and photophysical properties were investigated. These complexes exhibit intense deep blue emission in crystal state at room temperature and have peak wavelengths at 447-460 nm with microsecond lifetimes (τ = 114-752 μs). Emission color can be largely tuned from deep blue to green, from crystal to film state at 293 K. The emission of the complexes 1-3 mainly originates from intraligand and LLCT transitions. Solution-processed, nondoped and doped devices of complex 3 exhibit yellowish green emission with CIE(x, y) of (0.3557, 0.5031). The nondoped device gives a maximum external quantum efficiency (EQE) of 2.47% and a maximum luminance of 316 cd m.
具有热活化延迟荧光（TADF）的高发射性卤化亚铜（I）配合物受到了广泛关注。在此，合成了一系列含有双膦和单膦配体的四配位单核卤化亚铜（I）配合物[CuX(dpmt)(PPh)]（dpmt = 3,4-双（二苯基膦基）-2,5-二甲基噻吩，X = I（1）、Br（2）和Cl（3）），并对其分子结构和光物理性质进行了研究。这些配合物在室温下的晶体状态下表现出强烈的深蓝色发射，峰值波长在447 - 460 nm，寿命为微秒级（τ = 114 - 752 μs）。在293 K下，从晶体到薄膜状态，发射颜色可从深蓝色大幅调至绿色。配合物1 - 3的发射主要源于配体内和配体间电荷转移跃迁。配合物3的溶液加工、非掺杂和掺杂器件呈现黄绿色发射，CIE(x, y)为(0.3557, 0.5031)。非掺杂器件的最大外量子效率（EQE）为2.47%，最大亮度为316 cd m 。
