Organic electroluminescence devices based on mixture of aluminum-hydroxyquinoline complex and compound with low dielectric constant

被引：4

作者：

Fukuno, K ^{[1
]}

Osasa, T ^{[1
]}

Iwasaki, Y ^{[1
]}

Kimura, A ^{[1
]}

Matsumura, M ^{[1
]}

机构：

[1] Osaka Univ, Res Ctr Solar Energy Chem, Toyonaka, Osaka 5608531, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2005年 / 44卷 / 08期

关键词：

organic electroluminescence; photoluminescence; aluminum-hydroxyquinoline complex; quantum efficiency;

D O I：

10.1143/JJAP.44.6245

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The quantum efficiency and lifetime of fluorescence of an aluminum-hydroxyquinoline (Alq(3)) complex in solution increased with decreasing polarity of the solvent. Similarly, the fluorescence quantum efficiency and lifetime of Alq3 films were increased by mixing the complex with a compound with a low dielectric constant. These results suggested that the nonradiative decay process of Alq3 is retarded in less polar media. The quantum efficiency and lifetime of fluorescence of Alq(3) films were 20 +/- 2% and 17 ns, respectively. When Alq(3) was mixed with a less polar substance in the film state, the quantum efficiency and lifetime were increased to 25 +/- 2% and 20ns, respectively. These results indicate that the nonradiative decay process in the film state is also retarded as the polarity decreases. Using a film consisting of Alq3 and a compound with a low dielectric constant as the light emitting layer of organic electroluminescence devices, the luminance efficiency was increased by about 20%.

引用

页码：6245 / 6248

页数：4

共 20 条

[1] New charge-carrier blocking materials for high efficiency OLEDs [J].

Adamovich, VI ;

Cordero, SR ;

Djurovich, PI ;

Tamayo, A ;

Thompson, ME ;

D'Andrade, BW ;

Forrest, SR .

ORGANIC ELECTRONICS, 2003, 4 (2-3) :77-87

[2] PROTON NUCLEAR MAGNETIC RESONANCE STUDIES OF 8-QUINOLINOL AND SEVERAL OF ITS METAL COMPLEXES [J].

BAKER, BC ;

SAWYER, DT .

ANALYTICAL CHEMISTRY, 1968, 40 (13) :1945-&

[3] A new crystalline phase of the electroluminescent material tris(8-hydroxyquinoline) aluminum exhibiting blueshifted fluorescence [J].

Braun, M ;

Gmeiner, J ;

Tzolov, M ;

Coelle, M ;

Meyer, FD ;

Milius, W ;

Hillebrecht, H ;

Wendland, O ;

von Schütz, JU ;

Brütting, W .

JOURNAL OF CHEMICAL PHYSICS, 2001, 114 (21) :9625-9632

[4]

Bugar I, 2002, LASER PHYS, V12, P273

[5] Bright, saturated, red-to-yellow organic light-emitting devices based on polarization-induced spectral shifts [J].

Bulovic, V ;

Shoustikov, A ;

Baldo, MA ;

Bose, E ;

Kozlov, VG ;

Thompson, ME ;

Forrest, SR .

CHEMICAL PHYSICS LETTERS, 1998, 287 (3-4) :455-460

[6] Tuning the color emission of thin film molecular organic light emitting devices by the solid state solvation effect [J].

Bulovic, V ;

Deshpande, R ;

Thompson, ME ;

Forrest, SR .

CHEMICAL PHYSICS LETTERS, 1999, 308 (3-4) :317-322

[7] Alq3:: ab initio calculations of its structural and electronic properties in neutral and charged states [J].

Curioni, A ;

Boero, M ;

Andreoni, W .

CHEMICAL PHYSICS LETTERS, 1998, 294 (4-5) :263-271

[8] Morphological study of aluminum tris(8-hydroxyquinoline) thin films using infrared and Raman spectroscopy [J].

Curry, RJ ;

Gillin, WP ;

Clarkson, J ;

Batchelder, DN .

JOURNAL OF APPLIED PHYSICS, 2002, 92 (04) :1902-1905

[9] Effect of a plasma treatment of ITO on the performance of organic electroluminescent devices [J].

Furukawa, K ;

Terasaka, Y ;

Ueda, H ;

Matsumura, M .

SYNTHETIC METALS, 1997, 91 (1-3) :99-101

[10] Photoluminescence efficiency and absorption of aluminum-tris-quinolate (Alq(3)) thin films [J].

Garbuzov, DZ ;

Bulovic, V ;

Burrows, PE ;

Forrest, SR .

CHEMICAL PHYSICS LETTERS, 1996, 249 (5-6) :433-437

← 1 2 →