Blue Luminescent Device Utilizing 2-(4-Biphenylyl)-5-(4-t-butylphenyl)-1-3,4-oxadiazole as Hole Blocking Layer

Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (2): 317.

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Blue Luminescent Device Utilizing 2-(4-Biphenylyl)-5-(4-t-butylphenyl)-1-3,4-oxadiazole as Hole Blocking Layer

MA Yu-Guang¹, WU Jun², XUE Shan-Hua², HUANG Jing-Shong², LIU Xiao-Dong¹, TIAN Wen-Jing², LIU Shi-Yong¹, SHEN Jia-Cong³

1. Key Lab.of Molecular Spectra and Structure, Jilin Univ., Changchun, 130023;
2. National Lab.of Intergat Medied Opto-Electronics, Jilin Univ., Changchun, 130023;
3. Norman Bethune University Medical Science

Received:1994-04-28 Revised:1994-08-28 Online:1995-02-24 Published:1995-02-24

Abstract

Abstract: By placing an hole blocking layer between the polymer and the metallic electrode,we have improved efficiencies for blue light-emitting diodes fabricated with 1,1,4,4-tetraphenyl-1,3-butadiene doped poly(N-vinyl carbazole)as the emitting layer and with aluminum and ITO as the electron and hole injecting electrodes.The bilayer device yields bright blue emission having intensity of 300cd/m²in the same case the device without hole limiting layer have luminance only 44cd/m².

Key words: Polymer, Light-emitting diode, Hole blocking layer

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MA Yu-Guang, WU Jun, XUE Shan-Hua, HUANG Jing-Shong, LIU Xiao-Dong, TIAN Wen-Jing, LIU Shi-Yong, SHEN Jia-Cong. Blue Luminescent Device Utilizing 2-(4-Biphenylyl)-5-(4-t-butylphenyl)-1-3,4-oxadiazole as Hole Blocking Layer[J]. Chem. J. Chinese Universities, 1995, 16(2): 317.

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Blue Luminescent Device Utilizing 2-(4-Biphenylyl)-5-(4-t-butylphenyl)-1-3,4-oxadiazole as Hole Blocking Layer

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