• Title/Summary/Keyword: PDPMA LB film

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Characteristics of Organic Electroluminescent Device Consisting of PDPMA LB Film as a Polymer Hole Transport Material and Alq$_3$ (고분자 정공 전달체로서 PDPMA LB 필름과 Alq$_3$로 구성되는 유기 발광소자의 특성)

  • 오세용;김형민;이창호;최정우;이희우
    • Polymer(Korea)
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    • v.24 no.1
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    • pp.90-96
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    • 2000

  • Organic electroluminescent (EL) device was fabricated with Alq$_3$ as an emitting material and PDPMA ultra thin film prepared by Langmuir-Boldgett technique as a polymer hole transport layer. A stable condensed PDPMA monolayer was obtained using arachidic acid as a surface active material. The thickness and absorbance of PDPMA LB film increased line-arly with the layer numbers. The organic multilayered device consisted of ITO/PDPMA LB film (19 layers)/Alq$_3$/Al emitted green light with brightness of 2500 cd/m$^2$ at a DC 14 V Especially, the drive voltage of EL device having PDPMA LB film of 15 layers exhibited the value as low as 4 V. The effects of thickness control and molecular orientation in the PDPMA LB film on EL performance were discussed.

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