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| 1 | 甲基修饰的咔唑/二苯砜基AIE-TADF蓝光材料及其OLED器件显示文摘以四甲基咔唑为电子给体(D)、二苯砜为电子受体(A)构建了具有D-A-D结构的纯有机咔唑/二苯砜衍生物——9,9’-[磺酰基双(3,1-亚苯基)]双(1,3,6,8-四甲基-9H-咔唑)(TMe-m SOCz).对所合成材料的光物理性能研究表明,TMe-m SOCz表现出明显的聚集诱导发射(AIE)和热激活延迟荧光(TADF),延迟寿命和延迟荧光占比分别为2.26μs和47.7%,并具有良好的电化学稳定性和热稳定性.基于TMe-mSOCz作为非掺杂发光层制备了有机发光二极管(OLED)器件,其启亮电压(V_(on))为3.5 V,最大外量子效率为5.63%,国际照明委员会(CIE)坐标为(0.18,0.26).在1000 cd/m^(2)亮度下,非掺杂器件的效率滚降非常小(7.1%),色彩稳定性较好,其具有窄的半峰宽(FWHM=72 nm).研究结果表明,在传统TADF分子给受体间引入甲基修饰有利于开发具有AIE特性与更高效的D-A-D型TADF分子,这为基于AIE-TADF分子开发新型OLED器件提供了新途径. | 伍泽鑫 朱渊杰 王泓中 王均安 贺英 | 2022 | 高等学校化学学报2022，43，11： | 1 |
| 2 | AIEgen containing side-chain liquid crystalline polymers: Photoluminecence or photothermal, which dominate?显示文摘Why many luminescent liquid crystalline polymers(LLCPs)containing aggregation-induced emission luminogen(AIEgen)show weak emission is a question still to be answered.Herein,a series of LLCPs(α-Pns,n=4,8,and 12)with polynorbornene as main chain and twoα-dicyanodistyrylbenzene(α-DCS)as side chain are successfully synthesized to solve this issue.Differential scanning calorimetry(DSC),polarized light microscopy(PLM),one-dimentional(1D),two-dimentional(2D)middle-angle and wide-angle X-ray scattering(MAXS and WAXS)results demonstrate that the polymers form smectic A(SmA)phase with the side chains interdigitated packed within the smectic layers.Meanwhile,the photophysical properties ofα-Pns were investigated by ultraviolet-visible(UV-vis)absorption,steady state and time-resolved spectroscopy,and photothermal effect.Results show that the polymers are AIE active,but emit weak emission.The emission peak ofα-Pns film red-shift from 473 to 531 nm,the quantum yield gradually increases from around 1.6%to 14.7%,and the photothermal conversion efficiency decreases from 39%to 19%with the alkyl tail length increased.The photothermal effect,but not photoluminescence,dominates the excited state relaxation. | Lei Tao He-Lou Xie Xin Qi Jun Song Hong Xin Zhen-Qiang Yu | 2022 | Nano Research2022，15，10： | 0 |
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