Spectroscopic study of Mq3 (M = Al, Ga, In, q=8-hydroxyquinolinate) at high pressure

被引：24
作者：
Hernandez, I. [1 ]
Gillin, W. P. [1 ]
Somerton, M. [1 ]
机构：
[1] Queen Mary Univ London, Dept Phys, London E1 4NS, England
来源：
JOURNAL OF LUMINESCENCE | 2009年 / 129卷 / 12期
基金：
英国工程与自然科学研究理事会;
关键词：
OLED; Alq3; Gaq3; Inq3; High pressure; Luminescence; Polymorph; Isomer; Lifetime; Phase transition; THIN-FILMS; TRIS(8-HYDROXYQUINOLINE); ALUMINUM; ALQ(3); LUMINESCENCE; CRYSTALS; PHASE; FLUORESCENCE; PACKING;
D O I：
10.1016/j.jlumin.2009.02.030
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A high-pressure spectroscopic investigation of OLED materials with generic formula Mq(3) (M = Al, Ga, In, q = 8-hydroxyquinolinate) has been carried out. The meridional isomer of Alq(3), Gaq(3), Inq(3) and facial isomer of Alq(3) have been produced and their corresponding photoluminescence emission energy has been studied as a function of the cation, pressure, excitation wavelength and isomer. A redshift in the order of 0 3 eV takes place for the pure-meridional isomer compounds in the 0-8 GPa range We have detected the occurrence of pressure-induced phase transitions presenting hysteresis to ambient conditions. In the case of the facial isomer, luminescence does not significantly redshift until very high pressure We interpret these features in terms of the enhancement of the intermolecular interaction. (C) 2009 Elsevier B.V All rights reserved
引用
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页码：1835 / 1839
页数：5
相关论文
共 22 条
[1]   Luminescent compounds fac- and mer-aluminum tris(quinolin-8-olate).: A pure and hybrid density functional theory and time-dependent density functional theory investigation of their electronic and spectroscopic properties [J].
Amati, M ;
Lelj, F .
JOURNAL OF PHYSICAL CHEMISTRY A, 2003, 107 (14) :2560-2569
[2]   Rayleigh scattering and luminescence blue shift in tris(8-hydroxyquinoline)aluminum films [J].
Auzel, F ;
Baldacchini, G ;
Baldacchini, T ;
Chlacchiaretta, P ;
Pode, RB .
JOURNAL OF LUMINESCENCE, 2006, 119 :111-115
[3]   Time evolution of the emission band of Alq3 films in open atmosphere [J].
Baldacchini, Giuseppe ;
Baldacchini, Tommaso ;
Chiacchiaretta, Piero ;
Pace, Angelo ;
Pode, Ramchandra Balaji .
JOURNAL OF LUMINESCENCE, 2007, 122 :234-236
[4]   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
[5]   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
[6]   Structure and spectroscopic properties of the crystalline structures containing meridional and facial isomers of tris(8-hydroxyquinoline) gallium(III) [J].
Brinkmann, M ;
Fite, B ;
Pratontep, S ;
Chaumont, C .
CHEMISTRY OF MATERIALS, 2004, 16 (23) :4627-4633
[7]   METAL-ION DEPENDENT LUMINESCENCE EFFECTS IN METAL TRIS-QUINOLATE ORGANIC HETEROJUNCTION LIGHT-EMITTING DEVICES [J].
BURROWS, PE ;
SAPOCHAK, LS ;
MCCARTY, DM ;
FORREST, SR ;
THOMPSON, ME .
APPLIED PHYSICS LETTERS, 1994, 64 (20) :2718-2720
[8]   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
[9]   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
[10]   The structure of the blue luminescent δ-phase of tris(8-hydroxyquinoline)aluminium(III) (Alq3) [J].
Cölle, M ;
Dinnebier, RE ;
Brütting, W .
CHEMICAL COMMUNICATIONS, 2002, (23) :2908-2909
123