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

页码：5317 / 5323

页数：7

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