Size and concentration effects of gold nanoparticles on optical and electrical properties of plasmonic dye sensitized solar cells

Chander, Nikhil; Khan, Arshad; Thouti, Eshwar; Sardana, Sanjay K.; Chandrasekhar, P. S.; Dutta, Viresh; Komarala, Vamsi K.

doi:10.1016/j.solener.2014.08.011

Cited by 74 publications

(51 citation statements)

References 39 publications

(55 reference statements)

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“…A thinner film is desirable in order to mitigate recombination losses within the network of meso‐TiO 2 film and also reduce the amount of material used (TiO 2 in the present case). It is precisely because of these reasons that concepts like plasmonics and UC are employed for DSSCs, so that the device thickness and material usage can be reduced, while the photovoltaic performance of the device is improved . Any modification being performed on the TiO 2 layer should take into account this thickness‐variation effect.…”

Section: Resultsmentioning

confidence: 99%

Enhancement of dye sensitized solar cell efficiency via incorporation of upconverting phosphor nanoparticles as spectral converters

Chander

Khan

Komarala

et al. 2015

Progress in Photovoltaics

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Upconverting NaYF 4 :Yb 3+ ,Er 3+ /NaYF 4 core-shell (CS) nanoparticles (NPs) were synthesized by thermal decomposition of lanthanide trifluoroacetate precursors and mixed with TiO 2 NPs to fabricate dye-sensitized solar cells (DSSCs). The CS geometry effectively prevents the capture of electrons because of the surface states and improves photo-emission. The as-synthesized CS NPs show upconversion (UC) luminescence, converting near infrared (NIR) light into visible light (450-700 nm), making the photon absorption by the ruthenium-based dyes (which have little or no absorption in the NIR region) possible. The champion DSSCs fabricated using CS UC NPs (average size = 25 nm) show enhancements of~12.5% (sensitized with black/N749 dye) and of~5.5% (sensitized with N719 dye) in overall power conversion efficiency under AM 1.5G illumination. This variation in the enhancement of the DSSC efficiencies for black and N719 dyes is attributed to the difference in the extinction coefficient and the absorption wavelength range of dyes. Incident photonto-current conversion efficiency measurements also evidently showed the photocurrent enhancement in the NIR region of the spectrum because of the UC effect. The results prove that the augmentation in efficiency is primarily due to NIR to visible spectrum modification by the fluorescent UC NPs.

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Section: Resultsmentioning

confidence: 99%

Enhancement of dye sensitized solar cell efficiency via incorporation of upconverting phosphor nanoparticles as spectral converters

Chander

Khan

Komarala

et al. 2015

Progress in Photovoltaics

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“…It will be of major interest to make those broadband photodetectors for innovative applications. 20,21 For example, Liu and co-workers reported a photodetector by integrating AuNPs plasmonic structure with grapheme, thereby achieving greatly enhanced photocurrent and external quantum efficiency up to 1500%. However, to date, separate sensors or materials have still been required for different subbands from the visible to NIR wavelength range.…”

Section: Introductionmentioning

confidence: 99%

Remarkably enhanced red–NIR broad spectral absorption via gold nanoparticles: applications for organic photosensitive diodes

Luo

Wen

et al. 2015

Nanoscale

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For organic films, remarkably enhanced red-NIR broad spectral absorption was achieved via the incorporation of gold nanoparticles (AuNPs) using a simple and facile preparation. The relevant thermal evaporation method has produced size-controllable AuNPs in the range of 0-20 nm diameter. The potential use of localized surface plasmon resonance (LSPR) enhanced organic photosensitive diodes (OPDs) as sensitive broadband sensors was discussed in this context. Here we showed that, by combining organic heterojunctions with size-controllable plasmonic AuNPs, the efficiency of organic photodetectors could be increased by up to one order of magnitude, because of LSPR and scattering effects of the AuNPs. Fabricated OPD devices showed a large photoresponse under radiation from wavelengths between 650 and 830 nm, accompanied by a low power consumption profile. A schematic energy level model combined with theoretical simulation analysis was proposed to explain the experimental data. More importantly, to the best of our knowledge, this work demonstrated the broadest photosensitivity with high responsivity from AuNP-based photodetectors, proving the potential of AuNPs as a promising material for efficient optoelectronic devices.

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“…deposition with different power sources. Noble metal NPs can be fabricated by using different techniques like e-beam lithography, sputtering, evaporation methods and also by simple chemical routes [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. Sputtering (ions collision dislodges particles from the target material) is one of the most popular methods of physical vapor deposition (PVD) for the large area uniform deposition, and it is viable integration tool for any large area plasmonics based device fabrication.…”

Section: Introductionmentioning

confidence: 99%

Morphology and optical properties of sputter deposited silver nanoparticles on plain, textured and antireflection layer coated textured silicon

Sardana

Chava

Komarala

2015

Applied Surface Science

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Size and concentration effects of gold nanoparticles on optical and electrical properties of plasmonic dye sensitized solar cells

Cited by 74 publications

References 39 publications

Enhancement of dye sensitized solar cell efficiency via incorporation of upconverting phosphor nanoparticles as spectral converters

Enhancement of dye sensitized solar cell efficiency via incorporation of upconverting phosphor nanoparticles as spectral converters

Remarkably enhanced red–NIR broad spectral absorption via gold nanoparticles: applications for organic photosensitive diodes

Morphology and optical properties of sputter deposited silver nanoparticles on plain, textured and antireflection layer coated textured silicon

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