Organic light-emitting device operational stability at cryogenic temperatures

被引：11

作者：

D'Andrade, BW ^{[1
]}

Esler, J ^{[1
]}

Brown, JJ ^{[1
]}

机构：

[1] Universal Display Corp, Ewing, NJ 08618 USA

来源：

SYNTHETIC METALS | 2006年 / 156卷 / 5-6期

关键词：

OLED; stability; phosphorescence; cryogenic; morphology;

D O I：

10.1016/j.synthmet.2005.12.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The operational stability dependence on temperature of an organic light-emitting device (OLED) with a bathocuproine (BCP) blocking layer (BL) is examined. The OLED operated at 20 K has a factor of 5 increase in the operational stability compared to an identical device operated at 300 K. The small increase in stability or decrease in the rate of degradation suggests that the activation energy associated with the degradation process is << 100 meV. Additionally, the operational stability, at 20 K, of a BL=BCP device is shown to be equivalent to the operational stability of an OLED with an aluminum(III)bis(2-methyl-8-quinolinato)4-phenylphenolate (BAlq) BL. Given that the glass transition temperature of BCP is lower than BAlq, and that bond cleavage, and intermolecular chemical reactions have > 100 meV activation energies, we suggest that the operational instability of BCP BL OLEDs is due to BCPs low glass transition temperature. (c) 2006 Elsevier B.V. All rights reserved.

引用

收藏

页码：405 / 408

页数：4

相关论文

共 23 条

[11] Operational stability of electrophosphorescent devices containing p and n doped transport layers [J].

D'Andrade, BW ;

Forrest, SR ;

Chwang, AB .

APPLIED PHYSICS LETTERS, 2003, 83 (19) :3858-3860

[12] Effects of exciton and charge confinement on the performance of white organic p-i-n electrophosphorescent emissive excimer devices [J].

D'Andrade, BW ;

Forrest, SR .

JOURNAL OF APPLIED PHYSICS, 2003, 94 (05) :3101-3109

[13] Unusual phosphorescence characteristics of Ir(ppy)3 in a solid matrix at low temperatures [J].

Goushi, K ;

Kawamura, Y ;

Sasabe, H ;

Adachi, C .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 2004, 43 (7A) :L937-L939

[14] Efficient, deep-blue organic electrophosphorescence by guest charge trapping [J].

Holmes, RJ ;

D'Andrade, BW ;

Forrest, SR ;

Ren, X ;

Li, J ;

Thompson, ME .

APPLIED PHYSICS LETTERS, 2003, 83 (18) :3818-3820

[15] Simple accurate system for measuring absolute photoluminescence quantum efficiency in organic solid-state thin films [J].

Kawamura, Y ;

Sasabe, H ;

Adachi, C .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 2004, 43 (11A) :7729-7730

[16] Current status of electrophosphorescent device stability [J].

Kwong, RC ;

Weaver, MS ;

Lu, MHM ;

Tung, YJ ;

Chwang, AB ;

Zhou, TX ;

Hack, M ;

Brown, JJ .

ORGANIC ELECTRONICS, 2003, 4 (2-3) :155-164

[17] High operational stability of electrophosphorescent devices [J].

Kwong, RC ;

Nugent, MR ;

Michalski, L ;

Ngo, T ;

Rajan, K ;

Tung, YJ ;

Weaver, MS ;

Zhou, TX ;

Hack, M ;

Thompson, ME ;

Forrest, SR ;

Brown, JJ .

APPLIED PHYSICS LETTERS, 2002, 81 (01) :162-164

[18] Investigation of calcium as high performance cathode in small-molecule based organic light-emitting devices [J].

Lai, SL ;

Chan, MY ;

Lee, CS ;

Lee, ST .

JOURNAL OF APPLIED PHYSICS, 2003, 94 (11) :7297-7299

[19] Improving the thermal stability of organic light-emitting diodes by using a modified phthalocyanine layer [J].

Mori, T ;

Mitsuoka, T ;

Ishii, M ;

Fujikawa, H ;

Taga, Y .

APPLIED PHYSICS LETTERS, 2002, 80 (21) :3895-3897

[20] Analysis of the turn-off dynamics in polymer light-emitting diodes [J].

Pinner, DJ ;

Friend, RH ;

Tessler, N .

APPLIED PHYSICS LETTERS, 2000, 76 (09) :1137-1139