Reduced molybdenum oxide as an efficient electron injection layer in polymer light-emitting diodes

被引：47

作者：

Vasilopoulou, Maria ^{[1
]}

Palilis, Leonidas C. ^{[1
,2
]}

Georgiadou, Dimitra G. ^{[1
]}

Argitis, Panagiotis ^{[1
]}

Kennou, Stella ^{[3
]}

Sygellou, Labrini ^{[3
]}

Kostis, Ioannis ^{[1
,4
]}

Papadimitropoulos, Giorgos ^{[1
]}

Konofaos, Nikos ^{[5
]}

Iliadis, Agis A. ^{[5
,6
]}

Davazoglou, Dimitris ^{[1
]}

机构：

[1] NCSR Demokritos, Inst Microelect, Terma Patriarchou Grigor 15310, Aghia Paraskevi, Greece

[2] Univ Patras, Dept Phys, Patras 26500, Greece

[3] Univ Patras, Dept Chem Engn, Patras 26500, Greece

[4] Technol & Educ Inst Pireaus, Dept Elect, Aegaleo 12244, Greece

[5] Univ Aegean, Dept Informat & Commun Syst Engn, Karlovassi 83200, Greece

[6] Univ Maryland, Dept Elect & Comp Engn, College Pk, MD 20742 USA

来源：

APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 12期

基金：

美国国家科学基金会;

关键词：

Efficient electron injection - Electron injection layers - Modified polymer - PLED devices - Polymer light emitting diode - Polymer light-emitting diodes - Single layer - Thiadiazoles;

D O I：

10.1063/1.3557502

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report a significant improvement in the performance of single layer polymer light-emitting diodes (PLEDs), based on the green emitting copolymer poly [(9,9-dioctylfluorenyl-2,7-diyl)-co-(1,4-benzo-{2, 1',3}-thiadiazole)], upon inserting a very thin layer of partially reduced molybdenum oxide (MoO(x), where x=2.7) at the polymer/Al cathode interface. Both fully oxidized (x=3) and partially reduced (x=2.7) thin molybdenum oxide layers were investigated as electron injection layers and their influence on PLED device performance was examined. Improved current density, luminance, and efficiency was achieved only in the case of devices with a thin partially reduced MoO(2.7) film as electron injection layer, as a result of improved electron injection and more facile transfer at the modified polymer/Al interface. (C) 2011 American Institute of Physics. [doi:10.1063/1.3557502]

引用

页数：3

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