Extremely low-voltage driving of organic light-emitting diodes with a Cs-doped phenyldipyrenylphosphine oxide layer as an electron-injection layer

被引：83

作者：

Oyamada, T

Sasabe, H

Adachi, C

Murase, S

Tominaga, T

Maeda, C

机构：

[1] Chitose Inst Sci & Technol, Dept Photon Mat Sci, Chitose, Hokkaido 0668655, Japan

[2] Toray Industries Ltd, Elect & Imaging Mat Res Labs, Otsu, Shiga 5208558, Japan

[3] Saes Getters Japan Co, Higashi Gotanda, Tokyo 1410022, Japan

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 03期

关键词：

D O I：

10.1063/1.1852707

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrated efficient electron injection and transport in organic light-emitting diodes using an electron-transport layer (ETL) composed of a Cs and phenyldipyrenylphosphine oxide (POPy2) co-deposited layer. In particular, an ETL composed of a CS: POPy2 layer with an atom:molar ratio of 1:2 demonstrated an extremely low driving voltage, resulting in a high current density of 100 mA/cm(2) at an applied voltage of only 3.9 V The results of Kelvin probe and absorption measurements indicated that the formation of a CsAI alloy layer at the CS: POPy2/Al cathode interface and the charge-transfer complex between the Cs and POPy2 contributed to enhancing the efficiency of electron injection and transport, respectively. (C) 2005 American Institute of Physics.

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页码：1 / 3

页数：3

相关论文

共 12 条

[1] Electronic line-up in light-emitting diodes with alkali-halide/metal cathodes [J].

Brown, TM ;

Friend, RH ;

Millard, IS ;

Lacey, DJ ;

Butler, T ;

Burroughes, JH ;

Cacialli, F .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (10) :6159-6172

[2] Relationship between electroluminescence and current transport in organic heterojunction light-emitting devices [J].

Burrows, PE ;

Shen, Z ;

Bulovic, V ;

McCarty, DM ;

Forrest, SR ;

Cronin, JA ;

Thompson, ME .

JOURNAL OF APPLIED PHYSICS, 1996, 79 (10) :7991-8006

[3] Efficient CsF/Yb/Ag cathodes for organic light-emitting devices [J].

Chan, MY ;

Lai, SL ;

Fung, MK ;

Tong, SW ;

Lee, CS ;

Lee, ST .

APPLIED PHYSICS LETTERS, 2003, 82 (11) :1784-1786

[4] ELECTRONIC-STRUCTURE OF CESIUM ADSORBED ON AL(111) [J].

HOHLFELD, A ;

SUNJIC, M ;

HORN, K .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1987, 5 (04) :679-683

[5] Highly efficient and bright organic electroluminescent devices with an aluminum cathode [J].

Jabbour, GE ;

Kawabe, Y ;

Shaheen, SE ;

Wang, JF ;

Morrell, MM ;

Kippelen, B ;

Peyghambarian, N .

APPLIED PHYSICS LETTERS, 1997, 71 (13) :1762-1764

[6] Bright organic electroluminescent devices having a metal-doped electron-injecting layer [J].

Kido, J ;

Matsumoto, T .

APPLIED PHYSICS LETTERS, 1998, 73 (20) :2866-2868

[7] PHOTOELECTRIC EMISSION AND ELECTRICAL CONDUCTIVITY OF CESIUM COMPLEX WITH PYRENE DERIVATIVES [J].

OGINO, K ;

IWASHIMA, S ;

INOKUCHI, H ;

HARADA, Y .

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1965, 38 (03) :473-+

[8] Efficient electron injection mechanism in organic light-emitting diodes using an ultra thin layer of low-work-function metals [J].

Oyamada, T ;

Maeda, C ;

Sasabe, H ;

Adachi, C .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 2003, 42 (12B) :L1535-L1538

[9]

OYAMADA T, 2003, 64 AUT M JAP SOC APP

[10] Organic EL cells using alkaline metal compounds as electron injection materials [J].

Wakimoto, T ;

Fukuda, Y ;

Nagayama, K ;

Yokoi, A ;

Nakada, H ;

Tsuchida, M .

IEEE TRANSACTIONS ON ELECTRON DEVICES, 1997, 44 (08) :1245-1248