Lee, Misun Hyung, Kyung-Hee Lee, Wonjoo Ahn, Heejoon Cho, Byung Won Noh, Jaegeun Han, Sung-Hwan 2024-01-20T17:03:25Z 2024-01-20T17:03:25Z 2021-09-02 2011-05 1533-4880 https://pubs.kist.re.kr/handle/201004/130389 The binary self-assembled monolayers (SAMs) of di-(3-aminopropyl)-viologen (DAPV) and methylviologen (MV) molecules on indium tin oxide (ITO) were prepared by dipping the DAPV SAMs/ITO substrates into MV solution. The DAPV-MV SAM films were characterized by UV-vis. absorption spectroscopy, Rutherford backscattering spectroscopy, and cyclic voltammetry. Optical band gap, lowest unoccupied molecular orbital, and highest occupied molecular orbital of DAPV-MV SAMs were measured to be 1.6, -4.3, and -5.9 eV, respectively. We found that although DAPV SAMs have a quantum yield of 0.11%, the binary SAM films have a good quantum yield of 2.30%, which was 20 times higher than that of DAPV SAMs on ITO. This result may be due to the higher adsorption property of the binary SAMs for the light in visible range compared to that of DAPV SAMs. From this study, we demonstrated that the photocurrent generation systems with a high quantum yield can be obtained by the functional binary SAMs. English AMER SCIENTIFIC PUBLISHERS ELECTRON-TRANSFER SYSTEM RECOMBINATION ITO Enhanced Photocurrent Generation of Binary Self-Assembled Monolayers of Di-(3-aminopropyl)-Viologen and Methylviologen on Indium Tin Oxide Article 10.1166/jnn.2011.3626 1 JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.11, no.5, pp.4389 - 4393 JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 11 5 4389 4393 scie scopus 000290692400102 2-s2.0-84863074816 Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article; Proceedings Paper ELECTRON-TRANSFER SYSTEM RECOMBINATION ITO Self-Assembled Monolayers Photocurrent Cyclic Voltammetry Viologen Photoinduced Charge-Transfer