10月7日、有機エレクトロニクス研究センター4階大会議室において、第70回 有機エレクトロニクス研究センター講演会を開催しました。
今回は、Justus-Liebig-University GiessenのProf. Derck Schlettweinを講演者としてお迎えし"Growth of organic thin films and organic/inorganic hybrid materials on microstructured electrode arrays"という題で講演して頂きました。
講演には、多くの研究者、学生が参加し、大盛況のうちに終了しました。
 当日の会場の様子 |  Prof. Derck Schlettwein, Institute of Applied Physics and Laboratory of Materials Research, Justus-Liebig-University Giessen |
日時 | 10月7日(月) 午後1時30分～午後3時00分 |
会場 | 有機エレクトロニクス研究センター（10号館） 4階大会議室 |
講師 | Prof. Derck Schlettwein, Institute of Applied Physics and Laboratory of Materials Research, Justus-Liebig-University Giessen |
演題 | Growth of organic thin films and organic/inorganic hybrid materials on microstructured electrode arrays |
Interdigitated microstructured electrode arrays of gold or silver bands on oxidized silicon
were used as substrates for the vapor-deposition of substituted phthalocyanine thin films or
for the electrodeposition of crystalline ZnO thin films from aqueous precursor solutions. The
specific use of such substrates in the study of film growth and characterization will be shown
for two examples.
The organic semiconductor F16PcCu was characterized in organic field effect transistor
(OFET) geometry. The charge carrier mobility, the threshold voltage and the on/off- ratio
were determined during film preparation in intervals of 1 nm average film thickness. A
conductive channel in the interface region was already formed for 2 nm thick films. By such
in-situ characterization different contributions of interfacial and bulk transport could be
determined and used to optimize films to be used in OFET.
In the pulsed galvanostatic electrodeposition of ZnO from aqueous Zn(NO3)2 solutions,
homogenous films of ZnO were obtained for current densities below the diffusion-limited
regime. For larger current densities, strongly dendritic structures were formed. Film growth
was analyzed based on a duplex diffusion layer model of a steady-state and a pulsed
contribution and consequences for the film growth will be discussed.
