Barrierless hole injection through sub-bandgap occupied states in organic light emitting diodes using substoichiometric MoOx anode interfacial layer

被引：56

作者：

Vasilopoulou, Maria ^{[1
]}

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

Georgiadou, Dimitra G. ^{[1
]}

Kennou, Stella ^{[3
]}

Kostis, Ioannis ^{[1
]}

Davazoglou, Dimitris ^{[1
]}

Argitis, Panagiotis ^{[1
]}

机构：

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

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

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

来源：

APPLIED PHYSICS LETTERS | 2012年 / 100卷 / 01期

关键词：

TRANSITION-METAL OXIDES; EFFICIENT; CELLS;

D O I：

10.1063/1.3673283

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this letter, highly efficient hole injection was demonstrated in hole only devices based on organic semiconductors with different highest occupied molecular orbital level and transport properties. The barrierless hole injection was achieved by using a substoichiometric MoOx thin film (consisting of 65% Mo+6 and 35% Mo+5) as a higly effective anode interfacial layer. The current in these devices was found to be space charge limited, achieved due to the formation of highly efficient anode ohmic contact via the excellent band alignment through occupied gap states at the ITO/MoOx and MoOx/organic semiconductor modified interface. Quite remarkably, the efficiency of hole injection was found to be almost independent of the MoOx thickness, which is indicative of perfect band alignment at the anode interface. (C) 2012 American Institute of Physics. [doi:10.1063/1.3673283]

引用

页数：4

共 25 条

[11] Interface Engineering for Organic Electronics [J].

Ma, Hong ;

Yip, Hin-Lap ;

Huang, Fei ;

Jen, Alex K. -Y. .

ADVANCED FUNCTIONAL MATERIALS, 2010, 20 (09) :1371-1388

[12] Formation of Ohmic hole injection by inserting an ultrathin layer of molybdenum trioxide between indium tin oxide and organic hole-transporting layers [J].

Matsushima, Toshinori ;

Kinoshita, Yoshiki ;

Murata, Hideyuki .

APPLIED PHYSICS LETTERS, 2007, 91 (25)

[13] Effect of contamination on the electronic structure and hole-injection properties of MoO3/organic semiconductor interfaces [J].

Meyer, J. ;

Shu, A. ;

Kroeger, M. ;

Kahn, A. .

APPLIED PHYSICS LETTERS, 2010, 96 (13)

[14] A strategy towards p-type doping of organic materials with HOMO levels beyond 6 eV using tungsten oxide [J].

Meyer, Jens ;

Hamwi, Sami ;

Schmale, Stephan ;

Winkler, Thomas ;

Johannes, Hans-Hermann ;

Riedl, Thomas ;

Kowalsky, Wolfgang .

JOURNAL OF MATERIALS CHEMISTRY, 2009, 19 (06) :702-705

[15] Encapsulation-free hybrid organic-inorganic light-emitting diodes [J].

Morii, Katsuyuki ;

Ishida, Masaya ;

Takashima, Takeshi ;

Shimoda, Tatsuya ;

Wang, Qing ;

Nazeeruddin, Md. Khaja ;

Graetzel, Michael .

APPLIED PHYSICS LETTERS, 2006, 89 (18)

[16] Origins of Improved Hole-injection Efficiency by the Deposition of MoO3 on the Polymeric Semiconductor Poly (dioctylfluorene-alt-benzothiadiazole) [J].

Nakayama, Yasuo ;

Morii, Katsuyuki ;

Suzuki, Yuuichirou ;

Machida, Hiroyuki ;

Kera, Satoshi ;

Ueno, Nobuo ;

Kitagawa, Hiroshi ;

Noguchi, Yutaka ;

Ishii, Hisao .

ADVANCED FUNCTIONAL MATERIALS, 2009, 19 (23) :3746-3752

[17] Space-charge-limited hole current in poly(9,9-dioctylfluorene) diodes [J].

Nicolai, H. T. ;

Wetzelaer, G. A. H. ;

Kuik, M. ;

Kronemeijer, A. J. ;

de Boer, B. ;

Blom, P. W. M. .

APPLIED PHYSICS LETTERS, 2010, 96 (17)

[18] A water soluble inorganic molecular oxide as a novel efficient electron injection layer for hybrid light-emitting diodes (HyLEDs) [J].

Palilis, Leonidas C. ;

Vasilopoulou, Maria ;

Georgiadou, Dimitra G. ;

Argitis, Panagiotis .

ORGANIC ELECTRONICS, 2010, 11 (05) :887-894

[19] Porous hot-wire deposited WO3 films with high optical transmission [J].

Papadimitropoulos, G. ;

Vourdas, N. ;

Giannakopoulos, K. ;

Vasilopoulou, M. ;

Davazoglou, D. .

JOURNAL OF APPLIED PHYSICS, 2011, 109 (10)

[20] Efficient, Air-Stable Bulk Heterojunction Polymer Solar Cells Using MoOx as the Anode Interfacial Layer [J].

Sun, Yanming ;

Takacs, Christopher J. ;

Cowan, Sarah R. ;

Seo, Jung Hwa ;

Gong, Xiong ;

Roy, Anshuman ;

Heeger, Alan J. .

ADVANCED MATERIALS, 2011, 23 (19) :2226-+

← 1 2 3 →