1H-pyrazolo[3,4-b]quinolines and their performance in electroluminescent devices

A series of highly luminescent pyrazolo[3,4-b]quinolines were prepared and used as luminophores in fabrication of three-layer electroluminescent devices. The devices were fabricated using the basic structure of indium tinoxide (ITO)/TPD/Pyrazoloquinoline/ALQ/Mg:Ag, where TPD (3-methylphenyI)-1,1...

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Published inPolish journal of chemistry Vol. 78; no. 6; pp. 843 - 850
Main Authors Funaki, J, Imai, K, Araki, K, Danel, A, Tomasik, P
Format Journal Article
LanguageEnglish
Published WARSAW Polish Chemical Soc 01.06.2004
Subjects
Chemistry
Chemistry, Multidisciplinary
Physical Sciences
Science & Technology
luminophores
LIGHT-EMITTING-DIODES
blue emission
DIPYRAZOLOPYRIDINE DERIVATIVES
ORGANIC ELECTROLUMINESCENCE
BLUE ELECTROLUMINESCENCE
fluorescence
three-layer electroluminescent cells
blue-green emission
SUBSTITUTED PYRAZOLOQUINOLINES
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Summary:A series of highly luminescent pyrazolo[3,4-b]quinolines were prepared and used as luminophores in fabrication of three-layer electroluminescent devices. The devices were fabricated using the basic structure of indium tinoxide (ITO)/TPD/Pyrazoloquinoline/ALQ/Mg:Ag, where TPD (3-methylphenyI)-1,1'-biphenyl-4,4'-diamine was used as a hole transport layer and AlQ (8-hydroxyquinoline) as an electron transport layer. Bright blue-green and blue emissions were obtained from all the devices with such configurations. The devices with 6d and 6f pyrazoloquinoline derivatives achieved L-max=20800 cd/m(2) and 8550 cd/m(2) at a current density of 30 mA/4 mm(2). The luminance efficiency was 3.38 and 1.70 lm/W respectively.
ISSN:0137-5083