Study on EL emission region of polymer thin film in PPV LED

Z. H. Huang; J. H. Yang; L. C. Chen; X. J. Wang; W. L. Li; Y. Q. Qiu; J. T. Zhang; R. S. Wang

doi:10.1016/s0379-6779(97)04041-1

Study on EL emission region of polymer thin film in PPV LED

Z. H. Huang, J. H. Yang, L. C. Chen, X. J. Wang, W. L. Li, Y. Q. Qiu, J. T. Zhang, R. S. Wang

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

17 Scopus citations

Abstract

In this paper, the intensity ratios I(λ₁ = 515 nm)/I(λ₂ = 550 nm) of both electroluminescence (EL) and photoluminescence (PL) spectra of poly(phenylene vinylene) (PPV) thin film in the same PPV light-emitting diode (LED) are measured in order to discuss the EL emission dominant region. In the EL spectrum, the ratio I₁(λ₁)/I₁,(λ₂) decreased from 1.35 to 1.25, when the bias voltage increased from 4 to 12 V. In the PL spectrum, the ratios I₁(λ₁)/I₁(λ₂) and I₂(λ₁)/I₂(λ₂) (here I₁ and I₂ denote the intensities emitting from the indium-tin oxide (ITO) glass side and the opposite side, respectively) approach 1.5 and 1.3, separately. Based on these results, it is deduced that the emission dominant region of EL of PPV thin film in a single-layer PPV LED is close to the top electrode and apart from that of PL.

Original language	English (US)
Pages (from-to)	315-316
Number of pages	2
Journal	Synthetic Metals
Volume	91
Issue number	1-3
DOIs	https://doi.org/10.1016/s0379-6779(97)04041-1
State	Published - Dec 1997
Externally published	Yes

Bibliographical note

Funding Information:
This work is supported by the National Natural Science Foundation of P.R. China.

Keywords

Electroluminescence
Poly(phenylene vinylene) and derivatives
Thin films

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@article{f277e4d484114d97a9a5d4d83b706d65,

title = "Study on EL emission region of polymer thin film in PPV LED",

abstract = "In this paper, the intensity ratios I(λ1 = 515 nm)/I(λ2 = 550 nm) of both electroluminescence (EL) and photoluminescence (PL) spectra of poly(phenylene vinylene) (PPV) thin film in the same PPV light-emitting diode (LED) are measured in order to discuss the EL emission dominant region. In the EL spectrum, the ratio I1(λ1)/I1,(λ2) decreased from 1.35 to 1.25, when the bias voltage increased from 4 to 12 V. In the PL spectrum, the ratios I1(λ1)/I1(λ2) and I2(λ1)/I2(λ2) (here I1 and I2 denote the intensities emitting from the indium-tin oxide (ITO) glass side and the opposite side, respectively) approach 1.5 and 1.3, separately. Based on these results, it is deduced that the emission dominant region of EL of PPV thin film in a single-layer PPV LED is close to the top electrode and apart from that of PL.",

keywords = "Electroluminescence, Poly(phenylene vinylene) and derivatives, Thin films",

author = "Huang, {Z. H.} and Yang, {J. H.} and Chen, {L. C.} and Wang, {X. J.} and Li, {W. L.} and Qiu, {Y. Q.} and Zhang, {J. T.} and Wang, {R. S.}",

note = "Funding Information: This work is supported by the National Natural Science Foundation of P.R. China.",

year = "1997",

month = dec,

doi = "10.1016/s0379-6779(97)04041-1",

language = "English (US)",

volume = "91",

pages = "315--316",

journal = "Synthetic Metals",

issn = "0379-6779",

publisher = "Elsevier BV",

number = "1-3",

}

TY - JOUR

T1 - Study on EL emission region of polymer thin film in PPV LED

AU - Huang, Z. H.

AU - Yang, J. H.

AU - Chen, L. C.

AU - Wang, X. J.

AU - Li, W. L.

AU - Qiu, Y. Q.

AU - Zhang, J. T.

AU - Wang, R. S.

N1 - Funding Information: This work is supported by the National Natural Science Foundation of P.R. China.

PY - 1997/12

Y1 - 1997/12

N2 - In this paper, the intensity ratios I(λ1 = 515 nm)/I(λ2 = 550 nm) of both electroluminescence (EL) and photoluminescence (PL) spectra of poly(phenylene vinylene) (PPV) thin film in the same PPV light-emitting diode (LED) are measured in order to discuss the EL emission dominant region. In the EL spectrum, the ratio I1(λ1)/I1,(λ2) decreased from 1.35 to 1.25, when the bias voltage increased from 4 to 12 V. In the PL spectrum, the ratios I1(λ1)/I1(λ2) and I2(λ1)/I2(λ2) (here I1 and I2 denote the intensities emitting from the indium-tin oxide (ITO) glass side and the opposite side, respectively) approach 1.5 and 1.3, separately. Based on these results, it is deduced that the emission dominant region of EL of PPV thin film in a single-layer PPV LED is close to the top electrode and apart from that of PL.

AB - In this paper, the intensity ratios I(λ1 = 515 nm)/I(λ2 = 550 nm) of both electroluminescence (EL) and photoluminescence (PL) spectra of poly(phenylene vinylene) (PPV) thin film in the same PPV light-emitting diode (LED) are measured in order to discuss the EL emission dominant region. In the EL spectrum, the ratio I1(λ1)/I1,(λ2) decreased from 1.35 to 1.25, when the bias voltage increased from 4 to 12 V. In the PL spectrum, the ratios I1(λ1)/I1(λ2) and I2(λ1)/I2(λ2) (here I1 and I2 denote the intensities emitting from the indium-tin oxide (ITO) glass side and the opposite side, respectively) approach 1.5 and 1.3, separately. Based on these results, it is deduced that the emission dominant region of EL of PPV thin film in a single-layer PPV LED is close to the top electrode and apart from that of PL.

KW - Electroluminescence

KW - Poly(phenylene vinylene) and derivatives

KW - Thin films

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DO - 10.1016/s0379-6779(97)04041-1

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JO - Synthetic Metals

JF - Synthetic Metals

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ER -

Study on EL emission region of polymer thin film in PPV LED

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