Two-photon absorption behavior of conjugated oligomers suitable for low colour temperature LEDs

被引：0
|
作者：
Huang, Tianhao [1 ]
Jiang, Chengzi [2 ]
Xu, Tianning [1 ]
Ying, Jinhui [1 ]
Lu, Ran [3 ]
Zhou, Huipeng [4 ]
机构：
[1] Zhejiang Univ Technol, Dept Sci, Zhijiang Coll, Shaoxing 312030, Peoples R China
[2] Griffith Univ, Griffith Business Sch, Parklands Dr, Southport, Qld 4215, Australia
[3] Jilin Univ, Coll Chem, Changchun 130012, Peoples R China
[4] Jiangsu Sino Tech Polym New Mat Ind Technol Res In, Changzhou 213000, Peoples R China
来源：
RSC ADVANCES | 2023年 / 13卷 / 08期
关键词：
NONLINEAR-OPTICAL PROPERTIES; ORGANIC SOLAR-CELLS; CROSS-SECTION; ONE-PHOTON; FLUORESCENCE;
D O I：
10.1039/d3ra00083d
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Light emitting diodes (LEDs) with low colour temperatures (CTs) have been proved to be physiologically-friendly light sources. However, there are few reports on the photophysical properties of luminescent materials with CTs lower than candlelight. Herein, one- and two-photon optical properties of four fluorenone-based conjugated oligomers have been systemically investigated. By using a sum-over-essential states (SOS) approach, we obtained the transition dipole moments and two-photon absorption (TPA) cross sections. The triphenylamine end-capped oligomer exhibits reddish orange luminescence with extremely low colour temperature of 1686 K, which is much lower than that of candlelight. Fluorene-ethylene units serving as pi-spacers could weaken the role of electron-donating units and effectively enhance the TPA performance of oligomers. Our results provide an effective way for the design and optimization of universal light-emitting material candidates in optoelectronic devices.
引用
收藏
页码：5317 / 5323
页数：7
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