Space-charge limited current and electroluminescence in conjugated polymer-based LEDs

被引：0

作者：

Savvate'ev, V.N. ^{[1
]}

Tarabia, M. ^{[1
]}

Chayet, H. ^{[1
]}

Farragi, E.-Z. ^{[1
]}

Cohen, G.-B. ^{[1
]}

Kirstein, S. ^{[1
]}

Davidov, D. ^{[1
]}

Avny, Y. ^{[1
]}

Neumann, R. ^{[1
]}

机构：

[1] Hebrew Univ of Jerusalem, Jerusalem, Israel

来源：

Synthetic Metals | / 85卷 / 1-3期

关键词：

Aromatic polymers - Current voltage characteristics - Electric space charge - Electroluminescence - Photoconductivity - Vinyl resins;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We have studied the current versus voltage (I-V) and the luminescence versus voltage (EL-V) characteristics in PPV-based LED devices for different film thickness, d. For voltages below the EL threshold voltage, the I-V curves exhibit a linear regime (I approximately V) at low voltages and quadratic (I approximately V2) regime for higher voltages. The later is attributed to the space charge limited current mechanism assuming a single shallow trap level. The fit of the model to the experimental results is very good with a single fitting parameter, namely, the effective mobility. The extracted mobilities are compared to those measured independently by time-of-flight (TOF) photoconductivity. The SCLC model gives a reasonable explanation for the voltage threshold in EL.

引用

页码：1269 / 1270

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