Hole diffusion length and temperature dependence of photovoltages for n-Si electrodes modified with LB layers of ultrafine platinum particles

Jia, Jianguang; Fujitani, Morio; Yae, Shinji; Nakato, Yoshihiro

doi:10.1016/s0013-4686(96)00238-1

Cited by 30 publications

(34 citation statements)

References 12 publications

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“…As seen in the graph, Ga and As were detected during EE in smaller amounts than during ED. In previous studies, Nakato and colleagues reported that depositing Pt on semiconductors increases stability. − However, in the case of ED, Ga and As oxides generated during the Pt deposition process are not stable in solution and corrosion occurs, thus lowering the stability of the photocathodes. On the other hand, bare GaAs or GaAs with Pt deposited using EE does not form an oxide on the surface and is therefore able to operate more reliably in an electrolyte.…”

Section: Results and Discussionmentioning

confidence: 99%

Evaluation of Electroless Pt Deposition and Electron Beam Pt Evaporation on p-GaAs as a Photocathode for Hydrogen Evolution

Choi

Kim

Moon

et al. 2018

ACS Appl. Energy Mater.

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This study examines the changes in the photoelectrochemical (PEC) properties with Pt morphology after wet (electroless Pt deposition) and dry (e-beam Pt evaporation) deposition of Pt on p-GaAs. The Pt morphology and composition of the p-GaAs surface differed depending on the Pt deposition method, which in turn affected the optical and PEC properties of Pt on the GaAs electrode. Thus, the findings of this study can help us gain a clearer understanding of the manner in which these changes affect the operation of a GaAs PEC water-splitting electrode.

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Section: Results and Discussionmentioning

confidence: 99%

Evaluation of Electroless Pt Deposition and Electron Beam Pt Evaporation on p-GaAs as a Photocathode for Hydrogen Evolution

Choi

Kim

Moon

et al. 2018

ACS Appl. Energy Mater.

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“…These results clearly indicate that the Pt-particle-deposited µc-Si:H electrodes work by using the same mechanism as the Ptnanoparticle-deposited single-crystal n-Si electrodes, which work as ideal semiconductor photoelectrodes for generating high V OC and stable photocurrent. 3,11,13,18,19 The reduction of redox electrolyte concentration increased the short-circuit photocurrent density (j SC ) to 9.1 from 4.2 mAcm -2 (Fig. 6, solid line).…”

Section: Solar Water Splitting Using Multi-photon Systemmentioning

confidence: 91%

“…Modifying the semiconductor surface with metal nanoparticles eliminates these problems without lowering the high-energy barrier feature. 3,5,6,[10][11][12][13][14] The platinum (Pt) nanoparticles on the µc-Si:H thin film work as conducting channels between the µc-Si:H thin film and the electrolyte and as catalysts of electrochemical reaction. Thus, the Pt nanoparticles improve the electrode's stability and catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen production using metal nanoparticle modified silicon thin film photoelectrode

et al. 2007

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Hydrogen production using water splitting by photoelectrochemical solar cells equipped with a TiO 2 photoelectrode has been attracting much attention. However, TiO 2 encounters serious difficulty in achieving hydrogen evolution. One solution to this difficulty is using a hydrogen-producing semiconductor, such as silicon, and an oxidation reaction other than oxygen evolution, such as oxidation of iodide ions into iodine (triiodide ion). In this study, microcrystalline silicon (µc-Si:H) thin films are used as photoelectrodes in the photodecomposition of HI for low-cost and efficient production of solar hydrogen. An n-µc-3C-SiC:H and an i-µc-Si:H layer are deposited on glassy carbon substrates using the hot-wire cat-CVD method. The µc-Si:H electrodes are modified with platinum nanoparticles through electroless displacement deposition. The platinum nanoparticles improve the electrode's stability and catalytic activity. The electrodes produce hydrogen gas and iodine via photoelectrochemical decomposition of HI with no external bias under simulated solar illumination. We also attempt solar water splitting using a multi-photon system equipped with the µc-Si:H thin film and TiO 2 photoelectrodes in series.

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“…Quantitative analyses using electrodes with well-regulated distributions of Pt particles, prepared by use of Langmuir-Blodgett layers of Pt particles [3], have shown that ideal, minority-carrier controlled solar cells can be fabricated by this method [4]. We have also reported that the principle can be extended to preparation of solid-state solar cells with higher stability [5].…”

Section: Introductionmentioning

confidence: 93%

Structural Control of Semiconductor Surfaces on Atomic and Nanometer Scales for Efficient Solar Energy Conversion

Ishida¹,

Morisawa²,

Hinogami³

et al. 1999

Zeitschrift Für Physikalische Chemie

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Photoelectrochemistry I Solar cells I Small metal particle I Porous silicon I Surface termination bondStructural control of semiconductor surfaces on an atomic scale and that on a nanometer scale are both important for efficient solar energy conversion. The former is important for achieving low surface carrier recombination, high catalytic activity for interfacial reactions, formation of high energy barriers, etc. The latter is important for simultaneous achievement of all these requirements at one surface, which are in general incompatible with each other for homogeneous surfaces. The structural control on both scales can lead to ideal semiconductor electrodes. Some examples are shown for efficient solar cells and solar-to-chemical conversion by use of metal nano-particles, nanoporous Si layers, and introduction of surface-band asymmetry by formation of Si-halogen termination bonds. * Corresponding

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Hole diffusion length and temperature dependence of photovoltages for n-Si electrodes modified with LB layers of ultrafine platinum particles

Cited by 30 publications

References 12 publications

Evaluation of Electroless Pt Deposition and Electron Beam Pt Evaporation on p-GaAs as a Photocathode for Hydrogen Evolution

Evaluation of Electroless Pt Deposition and Electron Beam Pt Evaporation on p-GaAs as a Photocathode for Hydrogen Evolution

Hydrogen production using metal nanoparticle modified silicon thin film photoelectrode

Structural Control of Semiconductor Surfaces on Atomic and Nanometer Scales for Efficient Solar Energy Conversion

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