Single-component light-emitting electrochemical cell with improved stability

被引：77

作者：

Edman, L ^{[1
]}

Pauchard, M

Liu, B

Bazan, G

Moses, D

Heeger, AJ

机构：

[1] Univ Calif Santa Barbara, Ctr Polymers & Organ Solids, Santa Barbara, CA 93103 USA

[2] Umea Univ, Dept Phys, SE-90187 Umea, Sweden

[3] Univ Calif Santa Barbara, Dept Chem, Santa Barbara, CA 93106 USA

[4] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

[5] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

来源：

APPLIED PHYSICS LETTERS | 2003年 / 82卷 / 22期

关键词：

D O I：

10.1063/1.1577387

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report a single-component polymeric light-emitting electrochemical cell with poly[9,9'-bis[6"-(N, N, N-trimethylammonium)hexyl]fluorene-alt-co-phenylene]bromide (PFN+Br-) as the active material. Indium tin oxide/PFN+Br-/aluminum sandwich structures demonstrate a low and thickness-independent turn-on voltage (2.9 V) for blue light emission. Thermophysical characterization shows that PFN+Br- is in a metastable amorphous phase after spin casting, but that crystallization takes place at elevated temperatures. With this information at hand, we allowed devices to turn-on via ionic redistribution (and the formation of a p-i-n junction) in the amorphous phase, and then stabilized this desired configuration through crystallization. We find significantly improved lifetimes and relatively fast turn-on times for these single-component devices operating at room temperature. (C) 2003 American Institute of Physics.

引用

页码：3961 / 3963

页数：3

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