A strategy towards p-type doping of organic materials with HOMO levels beyond 6 eV using tungsten oxide

被引：90

作者：

Meyer, Jens ^{[1
]}

Hamwi, Sami ^{[1
]}

Schmale, Stephan ^{[1
]}

Winkler, Thomas ^{[1
]}

Johannes, Hans-Hermann ^{[1
]}

Riedl, Thomas ^{[1
]}

Kowalsky, Wolfgang ^{[1
]}

机构：

[1] Tech Univ Carolo Wilhelmina Braunschweig, Inst High Frequency Technol, D-38106 Braunschweig, Germany

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2009年 / 19卷 / 06期

关键词：

LIGHT-EMITTING-DIODES; THIN-FILMS; DEVICES; PHTHALOCYANINE; CLUSTERS; TRIOXIDE; LAYER;

D O I：

10.1039/b819485h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The authors present a concept to p-dope organic hole transport materials with highest occupied molecular orbital ( HOMO) levels on the order of 6 eV (e. g. 4,4',4 ''-tris(N-carbazolyl)-triphenylamine (TCTA) or 4,4'-bis(carbazol-9-yl)biphenyl (CBP)) by using WO3 as acceptor. Owing to its large work function, WO3 allows for efficient electron transfer from organic semiconductors with HOMO levels in this region. The effect of p-type doping is evidenced by optical absorption spectroscopy, electrical transport characteristics and Kelvin probe analysis. Moreover, OLED devices have been realized which exhibit 30% enhanced power efficiency due to the p-type doping. The results are expected to have a significant impact on the development of organic (opto-) electronic devices.

引用

页码：702 / 705

页数：4

共 21 条

[1] Very high-efficiency green organic light-emitting devices based on electrophosphorescence [J].

Baldo, MA ;

Lamansky, S ;

Burrows, PE ;

Thompson, ME ;

Forrest, SR .

APPLIED PHYSICS LETTERS, 1999, 75 (01) :4-6

[2] POLYMERIC GASEOUS SPECIES IN THE SUBLIMATION OF TUNGSTEN TRIOXIDE [J].

BERKOWITZ, J ;

CHUPKA, WA ;

INGHRAM, MG .

JOURNAL OF CHEMICAL PHYSICS, 1957, 27 (01) :85-86

[3] Low voltage organic light emitting diodes featuring doped phthalocyanine as hole transport material [J].

Blochwitz, J ;

Pfeiffer, M ;

Fritz, T ;

Leo, K .

APPLIED PHYSICS LETTERS, 1998, 73 (06) :729-731

[4] Formation of monodisperse (WO3)3 clusters on TiO2(110) [J].

Bondarchuk, Oleksandr ;

Huang, Xin ;

Kim, Jooho ;

Kay, Bruce D. ;

Wang, Lai-Sheng ;

White, J. M. ;

Dohnalek, Zdenek .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2006, 45 (29) :4786-4789

[5] Highly power efficient organic light-emitting diodes with a p-doping layer [J].

Chang, Chan-Ching ;

Hsieh, Ming-Ta ;

Chen, Jenn-Fang ;

Hwang, Shiao-Wen ;

Chen, Chin H. .

APPLIED PHYSICS LETTERS, 2006, 89 (25)

[6] Organic electroluminescent devices with a vacuum-deposited Lewis-acid-doped hole-injecting layer [J].

Endo, J ;

Matsumoto, T ;

Kido, J .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2002, 41 (3B) :L358-L360

[7] An organic p-type dopant with high thermal stability for an organic semiconductor [J].

Gao, Zhi Qiang ;

Mi, Bao Xiu ;

Xu, Gui Zhen ;

Wan, Yi Qian ;

Gong, Meng Lian ;

Cheah, Kok Wai ;

Chen, Chin H. .

CHEMICAL COMMUNICATIONS, 2008, (01) :117-119

[8] An iodine-doped polymer light-emitting diode [J].

Huang, F ;

MacDiarmid, AG ;

Hsieh, BR .

APPLIED PHYSICS LETTERS, 1997, 71 (17) :2415-2417

[9] Electrical conduction mechanisms in thermally evaporated tungsten trioxide (WO3) thin films [J].

Hutchins, M. G. ;

Abu-Alkhair, O. ;

El-Nahass, M. M. ;

Abdel-Hady, K. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2006, 18 (44) :9987-9997

[10] Low roll-off of efficiency at high current density in phosphorescent organic light emitting diodes [J].

Kang, Jae-Wook ;

Lee, Se-Hyung ;

Park, Hyung-Dol ;

Jeong, Won-Ik ;

Yoo, Kyung-Mo ;

Park, Young-Seo ;

Kim, Jang-Joo .

APPLIED PHYSICS LETTERS, 2007, 90 (22)

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