title: Synthesis and characterization of germane/stannane-capped polysiloles for the fabrication of luminescent OLED.
abstract: Dehydropolymerization (with various inorganic hydrides) and subsequent germane/stannane-capping (with Me2GeHCI and Ph2SnHCI) of 1,1-dihydrotetraphenylsilole (1) give electroluminescent germane/stannane-capped polysiloles (2) in high yield. The polymerization yield and molecular weight with Selectride increase in the order L-Selectride < N-Selectride < K-Selectride. The molecular weights increase in the order Red-Al < K-Selectride < Super Hydride. The germane/stannane-capped polysiloles 2 emit at 521 nm and are electroluminescent at 522 nm. The fluorescence quantum yield of 2 in toluene is (1.66 +/- 0.26) x 10(-2). The emission color is green and the maximum brightness of the device is 2,800 cd/m2 with a luminous efficiency of 0.68 lm/W. The type of end group exhibited no appreciable effect on the luminescent properties of polysilole backbone. Thus, the germane/stannane-capped polysiloles are found to be a good material for OLED fabrication.
authors.affiliation: Alan G. MacDiarmid Energy Research Institute (AMERI), Nanotechnology Research Center (NTRC) and Department of Chemistry, Chonnam National University, Gwangju 500-757, Korea.
authors.forename: Myoung-Hee
authors.initials: MH
authors.lastname: Kim
authors.forename: Hee-Gweon
authors.initials: HG
authors.lastname: Woo
authors.forename: Whan Gi
authors.initials: WG
authors.lastname: Kim
authors.forename: Myong-Shik
authors.initials: MS
authors.lastname: Cho