Effects of Gold Nanoparticles on Photocurrents of Zinc-Porphyrin-Viologen Linked Compound–Gold Nanoparticle Composite Films

Abstract

The fabrication of a zinc-porphyrin(ZnP)-viologen(V) linked compound with six methylene group (ZnP(6)V)-gold nanoparticle (AuP) composite films on indium-tin-oxide (ITO) electrodes were performed by the electrostatic layer-by-layer adsorption technique. The photocurrents in ZnP (6)V-AuP composite films were larger than those in ZnP(6)V films, and were much larger than those in ZnP films as a reference. The large enhancement of the photocurrents in ZnP(6)V-AuP composite films are most likely attributable to the combination of localized surface plasmon resonance due to AuP and photoinduced intramolecular electron-transfer due to the V moiety in the linked compound.

Photocurrent enhancements in a porphyrin-viologen linked compound under plasmonic and magnetic fields

“…Recently, we also found a remarkable enhancement in cathodic photocurrent responses for compo site films of a ZnP-V 2+ -linked compound [ZnP(6)V] as a D-Alinked compound with AgNPs or AuNPs on ITOelectrodes. This was attributed to a combination of LSPR and photoinduced intramolecular electrontransfer [37,38]. However, the MFEs on the photocurrents of ZnP(6)V-AgNP composite films and the large increase in the anodic photocurrent response because of LSPR has not been investigated yet.…”

“…We have reported the use of electrostatic layerby-layer adsorption for fabricating multi-structures of silver nanoparticles (AgNPs) [28,[32][33][34][35][36][37] and gold nanoparticles (AuNPs) [31,38]. This technique is convenient and sophisticated equipment such as vacuum systems are not required.…”

“…However, improving the efficiency of photoelectric conversion is the most important. One method to improve these devices is the use of localized surface plasmon resonance (LSPR) induced by the coupling of an incident electric field with free electrons in metal nanoparticles [26][27][28][29][30][31][32][33][34][35][36][37][38].…”

Effects of Silver and Gold Nanoparticles on Photon Upconversion Based on Sensitized Triplet-Triplet Annihilation

“…We also found the remarkable enhancements of photocurrent responses in the composite films of donor -acceptor linked compound and metal NP [silver nanoparticle (AgNP) or gold nanoparticle (AuNP)] on ITO electrodes attributable to the combination of localized surface plasmon resonance (LSPR) due to AgNP or AuNP and photoinduced intramolecular electron-transfer. 12,13) Recently, we observed the remarkable enhancement of photocurrent responses due to combining LSPR and magnetic field effects in donor-acceptor linked compound-AgNP composite films fabricated by combination of the electrostatic layer-by-layer adsorption technique and the Langmuir-Blodgett method. 14) Photon upconversion (PUC) based on sensitized triplet-triplet annihilation (TTA) (PUC-TTA) is a non-linear process involving multiple diffusion controlled triplet-triplet energy transfer steps, ultimately resulting in the generation of delayed fluorescence that is of higher energy than the incident light.…”

“…[1][2][3][4][5][6][7][8][9][10][11][12][13] Recently, we found the large enhancement of photocurrents of a porphyrin or a phthalocyanine derivative or a poly(3-hexylthiophene) as an organic dye in dye-metal NPs composite films on indium-tin-oxide (ITO) electrodes were performed by the electrostatic layer-by-layer adsorption technique [4][5][6][7][8][9][11][12][13] . We also found the remarkable enhancements of photocurrent responses in the composite films of donor -acceptor linked compound and metal NP [silver nanoparticle (AgNP) or gold nanoparticle (AuNP)] on ITO electrodes attributable to the combination of localized surface plasmon resonance (LSPR) due to AgNP or AuNP and photoinduced intramolecular electron-transfer.…”