Selective Synthesis of Facial and Meridianal Isomers of Alq3

被引:19
作者
Tsuboi, Taiju [1 ]
Torii, Yasuko [2 ]
机构
[1] Kyoto Sangyo Univ, Fac Engn, Kyoto 6038555, Japan
[2] Iwatani Chem Engn Ltd, Shiga, Japan
关键词
-Alq3; electroluminescence; facial; meridianal Alq3; organic light emitting diode; photoluminescence; LIGHT-EMITTING DEVICES; TRIS(8-HYDROXYQUINOLINE) ALUMINUM(III) ALQ(3); ORGANIC THIN-FILMS; STATE; NMR; FLUORESCENCE; POLYMORPHS; EMISSION; PACKING; PHASE;
D O I
10.1080/15421406.2010.495672
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Alq3 was synthesized by mixing 8-quinolinol and Al(OH)3 at about 95 degrees C. The reaction time of 24h leads to formation of -phase Alq3 which is formed by meridianal Alq3, while the reaction time of 100h leads to -Alq3 which is formed by facial Alq3. Unlike the conventional method, -Alq3 was obtained without heating -Alq3 at about 400 degrees C. The and phases were determined by X-ray diffraction, and confirmed by photoluminescence spectra with vibronic structure. Organic light emitting diode (OLED) fabricated using mer-Alq3 shows higher green Alq3 electroluminescence and longer lifetime than OLED fabricated using fac-Alq3.
引用
收藏
页码:42 / 52
页数:11
相关论文
共 25 条
[1]   Monomolecular isomerization processes of aluminum tris(8-hydroxyquinolinate) (Alq3):: a DFT study of gas-phase reaction paths [J].
Amati, M ;
Lelj, F .
CHEMICAL PHYSICS LETTERS, 2002, 363 (5-6) :451-457
[2]   Phosphorescent materials for application to organic light emitting devices [J].
Baldo, MA ;
Thompson, ME ;
Forrest, SR .
PURE AND APPLIED CHEMISTRY, 1999, 71 (11) :2095-2106
[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]   Correlation between molecular packing and optical properties in different crystalline polymorphs and amorphous thin films of mer-tris(8-hydroxyquinoline)aluminum(III) [J].
Brinkmann, M ;
Gadret, G ;
Muccini, M ;
Taliani, C ;
Masciocchi, N ;
Sironi, A .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2000, 122 (21) :5147-5157
[5]   Weak microcavity effects in organic light-emitting devices [J].
Bulovic, V ;
Khalfin, VB ;
Gu, G ;
Burrows, PE ;
Garbuzov, DZ ;
Forrest, SR .
PHYSICAL REVIEW B, 1998, 58 (07) :3730-3740
[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]   Optimization of organic light emitting diode structures [J].
Chan, J ;
Rakic, AD ;
Kwong, CY ;
Djurisic, AB ;
Majewski, ML ;
Chan, WK ;
Chui, PC .
PHOTONICS: DESIGN, TECHNOLOGY, AND PACKAGING, 2004, 5277 :311-319
[8]   The triplet state in tris-(8-hydroxyquinoline)aluminum [J].
Cölle, M ;
Gärditz, C ;
Braun, M .
JOURNAL OF APPLIED PHYSICS, 2004, 96 (11) :6133-6141
[9]   Thermal, structural and photophysical properties of the organic semiconductor Alq3 [J].
Cölle, M ;
Brütting, W .
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2004, 201 (06) :1095-1115
[10]   Preparation and characterization of blue-luminescent tris(8-hydroxyquinoline) aluminum (Alq3) [J].
Cölle, M ;
Gmeiner, J ;
Milius, W ;
Hillebrecht, H ;
Brütting, W .
ADVANCED FUNCTIONAL MATERIALS, 2003, 13 (02) :108-112