Tuning the Colour of Electroluminescence from Polymer and Dye Complex Films with Driven DC Voltage

Chem. J. Chinese Universities ›› 1994, Vol. 15 ›› Issue (12): 1866.

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Tuning the Colour of Electroluminescence from Polymer and Dye Complex Films with Driven DC Voltage

MA Yu-Guang¹, XUE Shan-Hua², HUANG Jin-Song², TIAN Wen-Jing¹, LIU Shi-Yong², SHEN Jia-Cong¹, LIU Xiao-Dong³

1. Key Lab. of Molecular Spectra and Structure, Jilin Univ., Changchun, 130023;
2. National Lab. of Intergated Opto-Elec. , Jilin Univ., Changchun, 130023;
3. Norman Bethun University of Medical Science, Changchun

Received:1994-08-03 Revised:1994-09-30 Online:1994-12-24 Published:1994-12-24

Abstract

Abstract: By placing an switching layer between the both light emitting layers, we have achieved the change of electroluminescence spectra from polymer and dye complex films with driven DC voltage. It was found that there are two bands with peak wavelength 455 nm and 520 nm in ELspectra which origined respectively from dye TPBand Alq, and the relative intensity of emission at 455 nm increases with the driven DCvoltage increasing. From the analysis of energy level of materials used, it can be found that there were both potential barrier in PVK/PBD and PBD/Alq interface, and the carriers transferring both potentials barriers at the driven voltage have some difference which made the combination of carriers shift their position when the driven voltage varied. This first discovery provides a new approach for full colour display in device fabrication.

Key words: Polymer, Light-emitting diode, Colour change

TrendMD:

MA Yu-Guang, XUE Shan-Hua, HUANG Jin-Song, TIAN Wen-Jing, LIU Shi-Yong, SHEN Jia-Cong, LIU Xiao-Dong. Tuning the Colour of Electroluminescence from Polymer and Dye Complex Films with Driven DC Voltage[J]. Chem. J. Chinese Universities, 1994, 15(12): 1866.

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Tuning the Colour of Electroluminescence from Polymer and Dye Complex Films with Driven DC Voltage

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