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1.韩山师范学院 化学与环境工程学院, 广东 潮州 521041
2.汕头大学 化学化工学院, 广东 汕头 515063
3.华南理工大学 发光材料与器件国家重点实验室, 广东 广州 510641
4.华东交通大学 材料科学与工程学院, 江西 南昌 330013
Received:25 September 2025,
Revised:2025-10-14,
Published:25 January 2026
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祝杰记,陈玉文,佟庆笑等.C6和C9位取代基对菲并咪唑衍生物光电性质的影响[J].发光学报,2026,47(01):1-9.
ZHU Jieji,CHEN Yuwen,TONG Qingxiao,et al.Influence of C6- and C9-substituents on Photoelectric Properties of Phenanthroimidazole Derivatives[J].Chinese Journal of Luminescence,2026,47(01):1-9.
祝杰记,陈玉文,佟庆笑等.C6和C9位取代基对菲并咪唑衍生物光电性质的影响[J].发光学报,2026,47(01):1-9. DOI: 10.37188/CJL.20250222. CSTR: 32170.14.CJL.20250222.
ZHU Jieji,CHEN Yuwen,TONG Qingxiao,et al.Influence of C6- and C9-substituents on Photoelectric Properties of Phenanthroimidazole Derivatives[J].Chinese Journal of Luminescence,2026,47(01):1-9. DOI: 10.37188/CJL.20250222. CSTR: 32170.14.CJL.20250222.
为探索菲并咪唑的C6和C9位取代基对衍生物光电性质的影响,设计合成了三个热激子蓝光材料TPA-PPI-Py、TPAPPI-mPy和TPAPPI-Qu。以此三种材料作为发光层制备了电致发光器件,器件的最大外量子效率分别为4.80%、5.25%和3.29%;最大电流效率分别为5.46,5.05,3.75 cd·A
-1
;对应的色坐标是(0.14,0.14)、(0.15,0.11)和(0.16,0.13)。结果表明,在菲并咪唑的C6及C9位引入弱吸电子取代基不影响其发光波长,但能显著提升材料载流子传输能力,在1~1 000 cd·m
-2
的亮度区间内,器件的外量子效率滚降均不超过10%,器件发光稳定。
To explore the influence of substituent at C6 and C9 positions of phenanthroimidazole, three hot exciton blue emitters TPAPPI-Py, TPAPPI-mPy and TPAPPI-Qu were synthesized. Based on TPAPPI-Py, TPAPPI-mPy and TPAPPI-Qu as the emitting layers in OLEDs, the EQE
max
of the devices are 4.80%, 5.25% and 3.29% with CE
max
of 5.46, 5.05, 3.75 cd·A
-1
, respectively. Those results indicated that the weak electron-withdrawing substituents at the C6 and C9 positions did not affect the emission wavelength, but was beneficial for enhancing carrier transport capability. The efficiency roll-off of the device remains below 10% in the luminance range from 1-1 000 cd·m
-
², indicating their excellent electroluminescence.
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