Effects of silver particles on the photovoltaic properties of dye-sensitized TiO2 thin films

Wen, Ching–ju; Ishikawa, Keiji; Kishima, Madoka; Yamada, Kôichi

doi:10.1016/s0927-0248(99)00117-8

Cited by 187 publications

(151 citation statements)

References 12 publications

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“…Of particular interest are the recently reported experimental data on giant enhancement of photoluminescence and absorption of light by semiconductor surfaces (of photo-diodes) covered with metallic (gold, silver, or copper) nanospheres, with sphere radii of the order of several to several tens of nanometres [4,5,6,7,8,9]. These phenomena are recognized as promising for the enhancement of the efficiency of solar cells by the application of special metallic nanoparticle coverings of photo-active layers [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Experimental observations [4,5,6,7,8,9] suggest, that the short range coupling between plasmons in nanospheres and electrons in the semiconductor substrate allows for significant growth of selective light energy transformation into a photo-current in the diode system. This phenomenon is not described in detail as of yet and moreover, some competitive mechanisms apparently contribute.…”

Section: Introductionmentioning

confidence: 99%

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Mechanism of plasmon-mediated enhancement of photovoltaic efficiency

Jacak¹,

Krasnyj²,

Jacak³

et al. 2011

J. Phys. D: Appl. Phys.

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Abstract.Metallic nanospheres (Au, Ag, Cu) deposited on PV-active semiconductor surface can act as light converters, collecting energy of incident photons in plasmon oscillations. This energy can be next transferred to semiconductor substrate via a near-field channel, in a more efficient manner in comparison to the direct photo-effect. We explain this enhancement by inclusion of indirect inter-band transitions in semiconductor layer due to the near-field coupling with plasmon radiation in nanoscale of the metallic components, where the momentum is not conserved as the system is not translationally invariant. The model of the nano-sphere plasmons is developed (RPA, analytical version, adjusted to description of large metallic clusters, with radius of 10 − 60 nm) including surface and volume modes. Damping of plasmons is analyzed via Lorentz friction, and irradiation losses in far-and near-field regimes. Resulting resonance shifts are verified experimentally for Au and Ag colloidal water solutions with respect to particle size. Probability of the electron interband transition (within the Fermi golden rule) in substrate semiconductor induced by coupling to plasmons in near-field regime turns out to be significantly larger than for coupling of electrons to planarwave photons. This is of practical importance for enhancement of thin-film solar cell efficiency, both for semiconductor type (like III-V semiconductor based cells) and for Confidential: not for distribution. Submitted to IOP Publishing for peer review 7 November 2010Mechanism of plasmon-mediated enhancement of PV efficiency 2 conjugate-polymer-based or dye organic plastic cells, intensively developed at present. We have described also a non-dissipative collective mode of surface plasmons in a chain of near-field-coupled metallic nanospheres, for particular size, separation parameters and wave-lengths. This would find an application in sub-diffraction electro-photonic circuit arrangement and for possible energy transport in solar cells, in particular in organic materials with low mobility of carriers.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanism of plasmon-mediated enhancement of photovoltaic efficiency

Jacak¹,

Krasnyj²,

Jacak³

et al. 2011

J. Phys. D: Appl. Phys.

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“…Several studies have exploited the optical properties of metal nanoparticles (NPs) for improving the performance of photoactive devices such as photodetectors, light-emitting diodes, and solar cells. [1][2][3][4][5][6][7][8] Depending on the size, shape, and surrounding material of a metal NP, coherent collective oscillations of the quasi-free electrons of a metal NP can be excited by an incident electromagnetic wave of a specific wavelength. These collective excitations of electrons are referred to as localized surface plasmon polaritons (LSPPs).…”

mentioning

confidence: 99%

“…As shown in Fig. 1, for sufficiently high energy, this so-called "hot" electron can be injected over the Schottky barrier formed by the NP-semiconductor interface (in case (i)) [5][6][7][8]25 or can directly reach the conduction band of the semiconductor (in case (ii)). This electron can then be transported by drift towards the opposite electrode of the device, thereby providing a photocurrent (Fig.…”

mentioning

confidence: 99%

Plasmon-induced photoexcitation of “hot” electrons and “hot” holes in amorphous silicon photosensitive devices containing silver nanoparticles

Moulin

Paetzold

Pieters

et al. 2013

Journal of Applied Physics

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Plasmon-induced photoexcitation of "hot" electrons and "hot" holes in amorphous silicon photosensitive devices containing silver nanoparticles We report on a plasmon-induced photocurrent in photosensitive devices based on hydrogenated amorphous silicon (a-Si:H) containing silver nanoparticles (NPs). The photocurrent is measured in a spectral region corresponding to optical transitions below the band gap of a-Si:H. Photoexcitation of "hot" electrons in the NPs or in defect states present in the vicinity of the NPs, resulting from plasmon decay in the NPs, is often cited as being responsible for this effect. In this study, we demonstrate that plasmon induced photogeneration of "hot" holes is also able to contribute to a photocurrent. A bifacial symmetrical transparent device was prepared in order to compare the internal quantum efficiency of both processes, the first based on the photogeneration of "hot" electrons and the second based on the photogeneration of "hot" holes.

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“…1,2 Enhanced photovoltaic conversion efficiencies of organic and dye-sensitized thin-film solar cells containing small metal NPs have already been demonstrated. [7][8][9] The observed increase in photocurrent is explained in terms of ͑i͒ improved light absorption in the active layer of the cell, due to the enhanced electromagnetic field in the vicinity of the NPs at the LSPP resonance or ͑ii͒ photoexcitation of electrons from the NPs to their surrounding. The positive contribution of surface plasmon polaritons ͑SPPs͒ on the photocurrent of inorganic semiconductor/metal Schottky junctions has also been reported by using the method of attenuated total reflection.…”

mentioning

confidence: 99%

Photoresponse enhancement in the near infrared wavelength range of ultrathin amorphous silicon photosensitive devices by integration of silver nanoparticles

Moulin

Luo

Pieters

et al. 2009

Applied Physics Letters

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We have investigated the contribution of localized surface plasmon polaritons (LSPPs) in silver nanoparticles with radii smaller than 20 nm to the photocurrent of ultrathin photosensitive devices based on amorphous silicon. An increased light absorption and an enhanced photocurrent are found for wavelengths between 600 nm and 1150 nm in presence of nanoparticles. As amorphous silicon absorbs light efficiently only at wavelengths up to 750 nm, the increased photocurrent in the near infrared range is explained in terms of LSPP-induced photoemission of electrons within and in close vicinity of the nanoparticles.

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Effects of silver particles on the photovoltaic properties of dye-sensitized TiO2 thin films

Cited by 187 publications

References 12 publications

Mechanism of plasmon-mediated enhancement of photovoltaic efficiency

Mechanism of plasmon-mediated enhancement of photovoltaic efficiency

Plasmon-induced photoexcitation of “hot” electrons and “hot” holes in amorphous silicon photosensitive devices containing silver nanoparticles

Photoresponse enhancement in the near infrared wavelength range of ultrathin amorphous silicon photosensitive devices by integration of silver nanoparticles

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