Energy Transfer and Luminescent Properties in PVK and Novel Donor-acceptor Molecular Materials Blend System

Chem. J. Chinese Universities

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Energy Transfer and Luminescent Properties in PVK and Novel Donor-acceptor Molecular Materials Blend System

ZHAO Yi-Xin, PENG Ping, ZHOU Yin-Hua, WU Wei-Cai, TIAN Wen-Jing*

Key Laboratory for Supramolecular Structure and Materials of Ministry of Education, Jilin University, Changchun 130012, China

Received:2006-10-10 Revised:1900-01-01 Online:2007-07-10 Published:2007-07-10
Contact: TIAN Wen-Jing

Abstract

Abstract: The energy transfer and the luminescent properties of PVK and four novel donor-π-acceptor(D-π-A) molecules(CKD, TKD, PKD, NKD) doped systems were investigated with the analysis of UV-Vis absorption spectra, photoluminescent excitation(PLE) spectra and photoluminescent(PL)spectra.The electroluminescence(EL) properties of the blend system were studied via the characterization of the devices ITO/PEDOT/PVK∶D-π-A ω/Alq₃/Al. The results demonstrate that by changing the donor moieties of D-π-A molecule, the band gap of D-π-A molecules can be adjusted. Meanwhile the fluorescence quantum efficiency varies significantly with the stereostructure of donor moieties of D-π-A molecules. Both the PL and EL spectra show that the energy transfer between PVK and D-π-A molecules occurs effectively. The emission performance of the blend system could be improved with changing the dopant ratio of PVK and D-π-A molecules. The power efficiency of the device is up to 1.75 cd/A at 729.1 cd/m², when the dopant mass fraction between PVK and TKD is 6.0%.

Key words: Donor-acceptor molecular, PVK∶D-π-A blend system, Photoluminescence, Energy transfer, Electroluminescence

CLC Number:

O644.19

TrendMD:

ZHAO Yi-Xin, PENG Ping, ZHOU Yin-Hua, WU Wei-Cai, TIAN Wen-Jing*. Energy Transfer and Luminescent Properties in PVK and Novel Donor-acceptor Molecular Materials Blend System[J]. Chem. J. Chinese Universities, doi: .

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Energy Transfer and Luminescent Properties in PVK and Novel Donor-acceptor Molecular Materials Blend System

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