Paper
5 December 2006 Aggregation-induced emission
Yongqiang Dong, Jacky Wing Yip Lam, Anjun Qin, Zhen Li, Jiaxin Sun, Hoi Sing Kwok, Ben Zhong Tang
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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.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yongqiang Dong, Jacky Wing Yip Lam, Anjun Qin, Zhen Li, Jiaxin Sun, Hoi Sing Kwok, and Ben Zhong Tang "Aggregation-induced emission", Proc. SPIE 6333, Organic Light Emitting Materials and Devices X, 63331D (5 December 2006); https://doi.org/10.1117/12.679373
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Cited by 4 scholarly publications.
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KEYWORDS
Molecules

Luminescence

Crystals

Electroluminescence

Molecular aggregates

Light emitting diodes

Chlorine

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