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Fine Fabrication and Optical Waveguide Characteristics of Hexagonal tris(8-hydroxyquinoline)aluminum(a?¢) (Alq3) Crystal
摘要: Herein, we reported on the precise growth and optical waveguide characteristics of hexagonal tris(8-hydroxyquinoline)aluminum(III) (Alq3) micro-crystals (MCs). The hexagonal Alq3 MCs were prepared using surfactant-assisted assembly growth with the help of cetyltrimethylammoniumbromide (CTAB), in which the crystallization occurred as a result of molecular assembly and packing. Also, we adjusted the molar ratio of Alq3 and CTAB for the control degree of crystallization. The formation and structure of Alq3 MCs were investigated using field-emission scanning electron microscopy and X-ray diffraction pattern experiments, respectively. The solid-state laser confocal microscope-photoluminescence spectra and charge-coupled device images for the Alq3 MCs were measured to study the luminescence efficiency and colors, respectively. The optical waveguide performance of the hexagonal Alq3 MCs was measured for each side direction. According to our results, crystalline Alq3 micro-crystals are promising materials for application to the development of optical communication devices.
关键词: photoluminescence,crystallinity,organometal,surfactant,Alq3,confocal microscope,waveguide
更新于2025-11-21 11:24:58
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Photoelectron Spectroscopy of Molecular Anion of Alq <sub/>3</sub> : An Estimation of Reorganization Energy for Electron Transport in the Bulk
摘要: A molecular anion of tris(8-hydroxyquinolinato)aluminum (Alq3) was generated by a pulsed discharge to the solid sample under supersonic expansion and its photoelectron spectrum was recorded after mass selection. The vertical detachment energy of Alq3? and the adiabatic electron affinity of Alq3 were determined to be 1.24 ± 0.01 and 0.89 ± 0.04 eV, respectively. By using these energies determined for monomeric Alq3, the reorganization energy for the intermolecular electron transport in bulk Alq3 was estimated to be 0.70 ± 0.08 eV.
关键词: Photoelectron Spectroscopy,Electron Transport,Reorganization Energy,Alq3,Molecular Anion
更新于2025-09-23 15:21:21
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A novel candle light-style OLED with a record low colour temperature
摘要: Candle light-style OLEDs based on new D–A–π–A type molecules incorporated into Alq3 matrix were developed. A record low colour temperature of 1722 K OLED radiation was achieved, which is by 80 K lower than that of the best devices reported previously.
关键词: colour temperature,Alq3 matrix,D–A–π–A type molecules,candle light-style,OLED
更新于2025-09-12 10:27:22