DGIST Scholar: Optical Properties of Cyclic Amine Type Dyes, and Their Electronic Band Structures with Molecular Microstructure

Division of Nanotechnology 1. Journal Articles

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Optical Properties of Cyclic Amine Type Dyes, and Their Electronic Band Structures with Molecular Microstructure

Title: Optical Properties of Cyclic Amine Type Dyes, and Their Electronic Band Structures with Molecular Microstructure

Author(s): Kim, Ki-Soo ; Han, Yoon Soo ; Kim, Cham ; Jeong, Seonju ; Kwak, Giseop ; Kim, Hyeryun ; Kwon, Younghwan ; Park, Seong-Hwan ; Woo, Sung-Ho ; Kim, Dae-Hwan ; Ha, Ki Ryong ; Choi, Byeong-Dae

Author Keywords: carbazole ; cyclic amine compound ; electronic band structure ; phenothiazine ; phenoxazine

Keywords: Phenoxazine ; Polymers ; Amines ; Atomic Spectroscopy ; Band Structure ; Carbazole ; Conjugated Copolymers ; Cyclic Amine Compound ; DERIVATIVES ; Electronic Band Structure ; FLUORENE ; Host Materials ; Insecticides ; Ionization Potential ; LIGHT-emITTING-DIODES ; Microstructure ; OLEDS ; Optical Properties ; Organic Compounds ; Oxygen ; Phenothiazine ; SULFUR ; VINYLENE

Abstract: Three different cyclic amine dyes, 9-(2-chlorophenyl)-9H-carbazole (CPCz; C18H12ClN), 10-(2-chlorophenyl)-10H-phenoxazine (CPPo; C18H12ClNO), and 10-(2-chlorophenyl)-10H-phenothiazine (CPPt; C18H12ClNS), were synthesized to systematically investigate their optical properties and electronic band structures with molecular microstructure. By the insertion of oxygen or sulfur atom into carbazole moiety, the absorption and photoluminescence (PL) spectra showed bathochromic shift, and the Stoke's shift was increased. Ionization potential of CPCz was measured as 5.75eV, on the other hand, CPPo and CPPt showed their ionization potentials of 5.37 and 5.39eV, respectively. The minute difference in chemical structure such as insertion of oxygen or sulfur atom caused huge change of optical property and electronic band structure.