Sol-gel synthesized plasmonic nanoparticles and their integration into dye sensitized solar cells

Kumar, Kaushal; Balu, A. R.; Ramachandran, Athira; Unnikrishnan, N.V.; Selvaraj, Nivas Babu

doi:10.1016/j.apsusc.2019.05.344

Cited by 6 publications

(3 citation statements)

References 38 publications

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“…Some of the commonly used bottom-up approaches involve sol–gel processing, chemical vapour deposition (CVD), laser pyrolysis, and colloidal self-assembly. The sol–gel process involves the mixing of dispersed solid nanoparticles in a homogenous liquid to invoke the formation of three dimensional agglomerates of specific morphologies ( Kumar et al, 2019 ). Electrotuneable voltage-controlled self-assembly of plasmonic nanoparticles at the interface of two immiscible electrolyte solutions was successfully evoked to obtain nanoplasmonic liquid mirrors ( Montelongo et al, 2017 ).…”

Section: Fabrication Of Plasmonic Nanomaterialsmentioning

confidence: 99%

Plasmon-enhanced fluorescence for biophotonics and bio-analytical applications

Dasgupta,

Ray

2024

Front. Chem.

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Fluorescence spectroscopy serves as an ultrasensitive sophisticated tool where background noises which serve as a major impediment to the detection of the desired signals can be safely avoided for detections down to the single-molecule levels. One such way of bypassing background noise is plasmon-enhanced fluorescence (PEF), where the interactions of fluorophores at the surface of metals or plasmonic nanoparticles are probed. The underlying condition is a significant spectral overlap between the localized surface plasmon resonance (LSPR) of the nanoparticle and the absorption or emission spectra of the fluorophore. The rationale being the coupling of the excited state of the fluorophore with the localized surface plasmon leads to an augmented emission, owing to local field enhancement. It is manifested in enhanced quantum yields concurrent with a decrease in fluorescence lifetimes, owing to an increase in radiative rate constants. This improvement in detection provided by PEF allows a significant scope of expansion in the domain of weakly emitting fluorophores which otherwise would have remained unperceivable. The concept of coupling of weak emitters with plasmons can bypass the problems of photobleaching, opening up avenues of imaging with significantly higher sensitivity and improved resolution. Furthermore, amplification of the emission signal by the coupling of free electrons of the metal nanoparticles with the electrons of the fluorophore provides ample opportunities for achieving lower detection limits that are involved in biological imaging and molecular sensing. One avenue that has attracted significant attraction in the last few years is the fast, label-free detection of bio-analytes under physiological conditions using plasmonic nanoparticles for point-of-care analysis. This review focusses on the applications of plasmonic nanomaterials in the field of biosensing, imaging with a brief introduction on the different aspects of LSPR and fabrication techniques.

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Section: Fabrication Of Plasmonic Nanomaterialsmentioning

confidence: 99%

Plasmon-enhanced fluorescence for biophotonics and bio-analytical applications

Dasgupta,

Ray

2024

Front. Chem.

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“…Localized surface plasmon resonance effect has been provoked, when the electromagnetic radiation encounters the metal nanoparticles, collective oscillation of electrons is in resonance with the radiation. Hence, researchers paid much attention to utilize the plasmonic effect offered by the metal nanoparticles like Ag, Au to enhance the efficiency of DSSC 13‐15 . Recently, in our previous report, Ag@TiO 2 nanocomposites were synthesized through sol–gel followed by photoreduction method and fabricated as photoanode for DSSC and achieved a 31% improvement in the power conversion efficiency (PCE) than the pristine TiO 2.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, researchers paid much attention to utilize the plasmonic effect offered by the metal nanoparticles like Ag, Au to enhance the efficiency of DSSC. [13][14][15] Recently, in our previous report, Ag@TiO 2 nanocomposites were synthesized through sol-gel followed by photoreduction method and fabricated as photoanode for DSSC and achieved a 31% improvement in the power conversion efficiency (PCE) than the pristine TiO 2. 16 He et al reported the synthesis of Au@TiO 2 microspheres through solvothermal followed by chemical reduction method and fabricated as photoanode for DSSC achieved highest PCE of 9.6%.…”

Section: Introductionmentioning

confidence: 99%

Elucidation of impressive photovoltaic performances upon the treatment of various aminosilanes over plasmonic photoelectrodes of dye‐sensitized solar cells

Bhojanaa

Pandikumar

2022

Intl J of Energy Research

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Summary The plasmonic photoelectrodes have pioneered the way for high‐efficiency dye‐sensitized solar cells (DSSC), however, metal nanoparticle degradation in iodine‐based electrolytes limits overall device performance. To overcome the problem, the present work focuses on the synthesis of amine‐functionalized silanes protected plasmonic nanocomposites since it serves dual functions such as effective binding of silver and preventing the corrosion of silver from the electrolyte. Various aminosilane bounded Ag@TiO2 (AS/Ag@TiO2) were synthesized and used as photoanodes in DSSC and their photovoltaic performance was tested under 100 mWcm−2 exposure with AM 1.5 G. The JSC, VOC, and power conversion efficiency (PCE) of [3‐(2‐aminoethylamino)propyl]trimethoxysilane (EDAS) bounded Ag@TiO2 are higher than the other aminosilane protected Ag@TiO2. The champion cell shows 38% higher efficiency than the pristine TiO2. Since EDAS contains two amine groups, it acts as a support for holding Ag and also helps to preserve Ag from the corrosive electrolyte environment. The maximum obtained PCE of EDAS bounded Ag@TiO2 is 7.23% with JSC, VOC and FF of 15.01 mAcm−2, 0.782 V and 61.3% respectively. The stability of the ADS photoanode‐based DSSC was tested and it was found to be stable for 3 days. Thus, this approach could be a versatile strategy for the development of higher efficiency plasmonic DSSC.

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