Improvement in Polymer Light-Emitting Diode Performance Using Polymer Heterojunction Structure Prepared by Evaporative Spray Deposition from Ultradilute Solution
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概要
- 論文の詳細を見る
We successfully demonstrated a significant improvement in polymer light-emitting diode performance by employing a polymer bilayer structure prepared by evaporative spray deposition from ultradilute solution (ESDUS). The bilayer structure consisted of two $\pi$-conjugated polymers, where the top layer was deposited from tetrahydrofuran (THF) solution by ESDUS onto the preceding bottom layer composed of the other THF-soluble polymer. The external quantum efficiency (EQE) of the bilayer device is improved markedly in comparison with that of a corresponding single-layer device prepared by conventional spin-coating. Moreover, the EQE of the bilayer device tends to be constant throughout a wide current region, whereas that of single-layer devices increases gradually with current density. These observations indicate that carriers are effectively blocked at the polymer/polymer interface of the bilayer device.
- Japan Society of Applied Physicsの論文
- 2006-08-25
著者
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Fujita Katsuhiko
Department Of Applied Science For Electronics And Material Chemistry Interdisciplinary Graduate Scho
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Tsutsui Tetsuo
Department Of Applied Science For Electronic And Materials Graduate School Of Engineering Sciences K
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Fujita Katsuhiko
Department of Applied Science for Electronics and Materials, Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga Koen, Kasuga, Fukuoka 816-8580, Japan
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Shakutsui Masato
Department of Applied Science for Electronics and Materials, Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga Koen, Kasuga, Fukuoka 816-8580, Japan
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Tsutsui Tetsuo
Department of Applied Science for Electronics and Materials, Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga Koen, Kasuga, Fukuoka 816-8580, Japan
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