High luminescence polarized polymer light-emitting diodes fabricated using aligned polyfluorene

Sheng Feng Chung; Ten Chin Wen; Wei Yang Chou; Tzung Fang Guo

doi:10.1143/JJAP.45.L60

High luminescence polarized polymer light-emitting diodes fabricated using aligned polyfluorene

Sheng Feng Chung
, Ten Chin Wen
, Wei Yang Chou
, Tzung Fang Guo

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

We have successfully constructed a polarized polymer light-emitting diodes (PLEDs) by employing poly(N-vinylcarbazole) (PVK) as an extra hole-transporting alignment layer that prevents the damage of the hole-injected layer of poly(3,4 ethylenedioxythiophene)-poly(styrene sulfonate) (PEDOT-PSS) by mechanical rubbing. The maximum luminance efficiency 0.31 cd A^-1 of blue polarized PLED fabricated with the aligned polufluorene (PF) layer is obtained. The brightness approaches 1000 cd m^-2 at a relatively low biased voltage. By using a PVK alignment layer, a dichroic ratio of 25.7 (at a 451 nm emission wavelength) was observed by finding the optimum thickness of PF that was sufficiently highly polarized to be used as an efficient light source in liquid crystal displays. The spectrum of photon emission is narrow, characterized by its full width at half maximum value.

Original language	English
Pages (from-to)	L60-L63
Journal	Japanese Journal of Applied Physics
Volume	45
Issue number	1-3
DOIs	https://doi.org/10.1143/JJAP.45.L60
Publication status	Published - 2006 Jan 31

All Science Journal Classification (ASJC) codes

General Engineering
General Physics and Astronomy

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10.1143/JJAP.45.L60

Cite this

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title = "High luminescence polarized polymer light-emitting diodes fabricated using aligned polyfluorene",

abstract = "We have successfully constructed a polarized polymer light-emitting diodes (PLEDs) by employing poly(N-vinylcarbazole) (PVK) as an extra hole-transporting alignment layer that prevents the damage of the hole-injected layer of poly(3,4 ethylenedioxythiophene)-poly(styrene sulfonate) (PEDOT-PSS) by mechanical rubbing. The maximum luminance efficiency 0.31 cd A-1 of blue polarized PLED fabricated with the aligned polufluorene (PF) layer is obtained. The brightness approaches 1000 cd m-2 at a relatively low biased voltage. By using a PVK alignment layer, a dichroic ratio of 25.7 (at a 451 nm emission wavelength) was observed by finding the optimum thickness of PF that was sufficiently highly polarized to be used as an efficient light source in liquid crystal displays. The spectrum of photon emission is narrow, characterized by its full width at half maximum value.",

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T1 - High luminescence polarized polymer light-emitting diodes fabricated using aligned polyfluorene

AU - Chung, Sheng Feng

AU - Wen, Ten Chin

AU - Chou, Wei Yang

AU - Guo, Tzung Fang

PY - 2006/1/31

Y1 - 2006/1/31

N2 - We have successfully constructed a polarized polymer light-emitting diodes (PLEDs) by employing poly(N-vinylcarbazole) (PVK) as an extra hole-transporting alignment layer that prevents the damage of the hole-injected layer of poly(3,4 ethylenedioxythiophene)-poly(styrene sulfonate) (PEDOT-PSS) by mechanical rubbing. The maximum luminance efficiency 0.31 cd A-1 of blue polarized PLED fabricated with the aligned polufluorene (PF) layer is obtained. The brightness approaches 1000 cd m-2 at a relatively low biased voltage. By using a PVK alignment layer, a dichroic ratio of 25.7 (at a 451 nm emission wavelength) was observed by finding the optimum thickness of PF that was sufficiently highly polarized to be used as an efficient light source in liquid crystal displays. The spectrum of photon emission is narrow, characterized by its full width at half maximum value.

AB - We have successfully constructed a polarized polymer light-emitting diodes (PLEDs) by employing poly(N-vinylcarbazole) (PVK) as an extra hole-transporting alignment layer that prevents the damage of the hole-injected layer of poly(3,4 ethylenedioxythiophene)-poly(styrene sulfonate) (PEDOT-PSS) by mechanical rubbing. The maximum luminance efficiency 0.31 cd A-1 of blue polarized PLED fabricated with the aligned polufluorene (PF) layer is obtained. The brightness approaches 1000 cd m-2 at a relatively low biased voltage. By using a PVK alignment layer, a dichroic ratio of 25.7 (at a 451 nm emission wavelength) was observed by finding the optimum thickness of PF that was sufficiently highly polarized to be used as an efficient light source in liquid crystal displays. The spectrum of photon emission is narrow, characterized by its full width at half maximum value.

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JO - Japanese Journal of Applied Physics

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High luminescence polarized polymer light-emitting diodes fabricated using aligned polyfluorene

Abstract

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