Formation of self-assembled monolayers of di-(3-aminopropyl)-viologen as electron acceptor on ITO surface

Hyung, Kyung Hee; Han, Sang Woo

doi:10.1016/s0379-6779(02)01171-2

Cited by 11 publications

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“…The surface concentrations of the DAPV film were independently measured by Rutherford backscattering spectroscopy to give 8.7 × 10 -10 mol/cm 2 . 18,20 The UV-vis absorption spectrum and the cyclic voltammogram were used to calculate the energy band gap, HOMO, and LUMO of the DAPV/ITO. The energy band gap of viologen dimers, (DAPV •+ ) 2 , was measured to be 1.6 eV from the UV-vis absorption band edge of (DAPV •+ ) 2 /ITO (λ ) 775 nm, Figure 2).…”

Section: Resultsmentioning

confidence: 99%

Structural, Optical, and Electronic Properties of Self-Assembled Di-(3-diaminopropyl)-viologen on Indium Tin Oxide Electrode Surfaces

et al. 2008

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Di-(3-aminopropyl)-viologen (DAPV) on indium tin oxide (ITO) films were prepared as self-assembled monolayers (SAMs), and were well characterized using scanning tunneling microscopy (STM), UV-vis absorption spectroscopy, and electrochemistry. Furthermore, DAPV on ITO SAMs film was applied to a photoinduced charge transfer system. The STM images of the ordered SAMs on ITO showed round-shaped small domains with an average size of 15 nm, and the periodicity of the molecular rows in the domains was approximately 2.1 ( 0.2 nm. The energy band gap, the highest occupied molecular orbital (HOMO), and the lowest unoccupied molecular orbital (LUMO) of DAPV on ITO were measured using a UV-vis absorption spectrum and a cyclic voltammogram. The energy band gap, HOMO, and LUMO of DAPV on ITO were 1.6, -5.7, and -4.1 eV, respectively. Under illumination, the DAPV on ITO films showed a current change of 28 nA/cm 2 under an air mass (AM) 1.5 condition (I ) 89 mW/cm 2 ) in a vacuum (10 -6 torr). Furthermore, SAM films on ITO showed a photocurrent of 52.5 µA/cm 2 under an AM 1.5 condition (λ ) 530 nm, 3.3 mW/cm 2 ) in the presence of I -/I 3 -/CH 3 CN.

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Section: Resultsmentioning

confidence: 99%

Structural, Optical, and Electronic Properties of Self-Assembled Di-(3-diaminopropyl)-viologen on Indium Tin Oxide Electrode Surfaces

et al. 2008

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“…(1) Self-assembled monolayers of di-(3-diaminopropyl)-viologen on ITO and molecular layering of Ru(2,2 0 -bipyridine-4,4,-dicarboxylic acid) 2 (NCS) 2 on SAMs-ITO SAMs of di-(3-diaminopropyl)-viologen were prepared on an ITO surface using the previously reported method. [11][12][13][14][15] The SAMs were quite stable in air and even survived in 0.1 N HCl solution. As a reference, SAMs of diaminododecane were prepared on ITO, too.…”

Section: Resultsmentioning

confidence: 99%

“…The surface concentrations of DAPV and DADD on the ITO were quantified using cyclic voltammetry of the phosphomolybdic acid (H 3 PMo 12 O 40 ) adsorbed on the amine layers by the formation of an acidbase complex (Scheme 1). 11,15 Phosphomolybdic acid is a strong Brønsted acid with multi-protons, and easily forms monolayers on the basic DAPV on ITO. Phosphomolybdic acid has good redox properties and has been investigated for its electrochemical behavior.…”

Section: Resultsmentioning

confidence: 99%

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Molecular photosensors of self-assembled monolayers: electron acceptor–photosensitizer dyad on an ITO surface

2005

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Self-assembled monolayers of di-(3-diaminopropyl)-viologen (DAPV) were prepared on a tin-doped indium oxide (ITO) surface as acceptor layers. Photoactive layers of Ru(2,2 0 -bipyridine-4,4 0 -dicarboxylic acid) 2 (NCS) 2 were formed on DAPV to give an acceptor-sensitizer dyad on ITO. The photon energy was monitored by measuring the ITO conductivity change. Under illumination, the ITO conductivity increased with the current increasing by increments of 8 nA indicating the construction of molecular photosensors on the ITO surface. The concept of a molecular photosensor was further applied to a molecular photovoltaic system. The presence of the viologen moiety bridges the energy levels between the LUMO of the Ru sensitizer and ITO, and improves the efficiency of a photovoltaic cell with a quantum yield of 18.4% at 3.3 mW cm À2 . 1022N e w J . C h e m . , 2 0 0 5 , 2 9 , 1 0 2 2 -1 0 2 6

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“…Recently, it was reported that amine functionalized compounds can also form SAM on ITO surface [18][19][20][21]. Based on this report, in the present work we have examined the self-assembly of 4a-Co II TAPc on ITO surface using cyclic voltammetry and Raman and UV-visible spectroscopic techniques.…”

Section: Introductionmentioning

confidence: 90%

Electrochemical and spectral studies of self-assembled monolayer of 1,8,15,22-tetraaminophthalocyanatocobalt(II) on indium tin oxide surface

Sivanesan

John

2009

Journal of Electroanalytical Chemistry

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Formation of self-assembled monolayers of di-(3-aminopropyl)-viologen as electron acceptor on ITO surface

Cited by 11 publications

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Structural, Optical, and Electronic Properties of Self-Assembled Di-(3-diaminopropyl)-viologen on Indium Tin Oxide Electrode Surfaces

Structural, Optical, and Electronic Properties of Self-Assembled Di-(3-diaminopropyl)-viologen on Indium Tin Oxide Electrode Surfaces

Molecular photosensors of self-assembled monolayers: electron acceptor–photosensitizer dyad on an ITO surface

Electrochemical and spectral studies of self-assembled monolayer of 1,8,15,22-tetraaminophthalocyanatocobalt(II) on indium tin oxide surface

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