Title of article
Study on EL emission region of polymer thin film in PPV LED
Author/Authors
Huang، نويسنده , , Z.-H. and Yang، نويسنده , , J.-H. and Chen، نويسنده , , L.-C. and Wang، نويسنده , , X.-J. and Li، نويسنده , , W.-L. and Qiu، نويسنده , , Y.-Q. and Zhang، نويسنده , , J.-T. and Wang، نويسنده , , R.-S.، نويسنده ,
Issue Information
دوماهنامه با شماره پیاپی سال 1997
Pages
2
From page
315
To page
316
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)/I 2(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
poly(phenylene vinylene) and derivatives , electroluminescence , Thin films
Journal title
Synthetic Metals
Serial Year
1997
Journal title
Synthetic Metals
Record number
2071675
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