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Proceedings Paper

Aggregation-induced emission
Author(s): Yongqiang Dong; Jacky Wing Yip Lam; Anjun Qin; Zhen Li; Jiaxin Sun; Hoi Sing Kwok; Ben Zhong Tang
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Paper Abstract

New chromophoric molecules of 1,1-di(thiophen-2-yl)-2,3,4,5-tetraphenyl-silole (T2TPS), 9-(diphenylmethylene)-9H-fluorene (DPMF), and tetraphenyletheneare (TPE) are designed and synthesized. When molecularly dissolved in common organic solvents, the molecules are practically nonemissive. Addition of poor solvents induces the molecules to aggregate, which turns the emission "on" and boosts their luminescence efficiencies dramatically ("aggregation-induced emission" or AIE). The photoluminescence (PL) of T2TPS and TPE layers adsorbed on the TLC plates can be turned "off" and "on" continuously and reversibly by solvent exposure and evaporation. Transformation from amorphous phase to crystalline structure blue-shifts the PL spectrum of T2TPS and enhances its intensity. A light-emitting devices (LEDs) device based on TPE is fabricated, which emits a blue light of 447 nm with a low turn-on voltage of 2.9 V.

Paper Details

Date Published: 5 December 2006
PDF: 10 pages
Proc. SPIE 6333, Organic Light Emitting Materials and Devices X, 63331D (5 December 2006); doi: 10.1117/12.679373
Show Author Affiliations
Yongqiang Dong, The Hong Kong Univ. of Science and Technology (Hong Kong China)
Zhejiang Univ. (China)
Jacky Wing Yip Lam, The Hong Kong Univ. of Science and Technology (Hong Kong China)
Anjun Qin, The Hong Kong Univ. of Science and Technology (Hong Kong China)
Zhen Li, The Hong Kong Univ. of Science and Technology (Hong Kong China)
Jiaxin Sun, The Hong Kong Univ. of Science and Technology (Hong Kong China)
Hoi Sing Kwok, The Hong Kong Univ. of Science and Technology (Hong Kong China)
Ben Zhong Tang, The Hong Kong Univ. of Science and Technology (Hong Kong China)
Zhejiang Univ. (China)


Published in SPIE Proceedings Vol. 6333:
Organic Light Emitting Materials and Devices X
Zakya H. Kafafi; Franky So, Editor(s)

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