Photo- and electro-luminescence of three TADF binuclear Cu(I) complexes with functional tetraimine ligands
Photo- and electro-luminescence of three TADF binuclear Cu(I) complexes with functional tetraimine ligands
复制标题
DOI：
10.1039/c7tc00443e
复制
发表时间：
2017-05
影响因子：
6.4
通讯作者：
Ling Lin;Dong-Hui Chen;R. Yu;Xu-Lin Chen;Wenjuan Zhu;Dong Liang;J. Chang;Qing Zhang;Canzhong Lu
中科院分区：
文献类型：
--
作者：
Ling Lin;Dong-Hui Chen;R. Yu;Xu-Lin Chen;Wenjuan Zhu;Dong Liang;J. Chang;Qing Zhang;Canzhong Lu
三个新双核的亚铜配合物具有类似tetraimine配体(Cu2 (pytzph)(流行)2)(BF4) 2 (1), (Cu2 (pytzphcf)(流行)2)(BF4) 2(2)和(Cu2 (pytzphcz)(流行)2)(BF4) 2 (3), (pytzph = 6,6’- (1-phenyl-1 2 4-triazole-3 5-diyl) bis (2-methylpyridine) pytzphcf = 6, 6 ' - (1 - (4 - (trifluoromethyl)苯基)1、2,4-triazole-3, 5-diyl) bis (2-methylpyridine) pytzphcz = 9 - (4 - (3, 5-bis (6-methylpyridin-2-yl) 1、2,4-triazol-1-yl)苯基)咔唑和流行= bis [2 - (diphenylphosphine)苯基]醚),为了比较取代基对光致发光（PL）和电致发光（EL）性能的不同影响，合成并表征了不同取代基对光致发光（PL）和电致发光（EL）性能的影响。这些配合物在室温下表现出高效的绿色热激活延迟荧光（TADF），衰变时间短（5.5 ~ 16 μs），光致发光量子产率高（高达79%）。这些配合物的发射能量基本相同。然而，取代基对光致发光和电致发光效率的影响是明显的。在溶液处理OLED中，含有咔唑基团的配合物3在PL和EL方面都表现出最高的效率，EQE为8.3%，CE为27.1 cd a−1，峰值亮度为2525 cd cm−2，而含有三氟甲基附属物的配合物2的量子效率较差。
Three new binuclear cuprous complexes with similar tetraimine ligands [Cu2(pytzph)(POP)2](BF4)2 (1), [Cu2(pytzphcf)(POP)2](BF4)2 (2) and [Cu2(pytzphcz)(POP)2](BF4)2 (3), (pytzph = 6,6′-(1-phenyl-1,2,4-triazole-3,5-diyl)bis(2-methylpyridine), pytzphcf = 6,6′-(1-(4-(trifluoromethyl)phenyl)-1,2,4-triazole-3,5-diyl)bis(2-methylpyridine), pytzphcz = 9-(4-(3,5-bis(6-methylpyridin-2-yl)-1,2,4-triazol-1-yl)phenyl)-carbazole and POP = bis[2-(diphenylphosphine)phenyl]ether), have been synthesized and characterized in order to compare the different effects of substituent groups on the photoluminescence (PL) and electroluminescence (EL) properties. These complexes exhibit highly efficient green thermally activated delayed fluorescence (TADF) with short decay times (5.5–16 μs) and high photoluminescence quantum yields (up to 79%) at room temperature in the solid form. These complexes have essentially identical emission energy. However, the influence of the substituents on the photoluminescence and electroluminescence efficiencies is evident. Complex 3 with the carbazole group shows the highest efficiency in terms of both PL and EL, exhibiting an EQE of 8.3%, a CE of 27.1 cd A−1 and a peak brightness of 2525 cd cm−2 in the solution-processed OLED, while complex 2 with a trifluoromethyl appendage exhibits poorer quantum efficiency than the others.