Template assisted nanoporous TiO2 nanoparticles: The effect of oxygen vacancy defects on photovoltaic performance of DSSC and QDSSC

Das, Tapan Kumar; Ilaiyaraja, P.; Sudakar, C.

doi:10.1016/j.solener.2017.11.061

Cited by 49 publications

(28 citation statements)

References 42 publications

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“…Since Grätzel et al developed the titanium dioxide (TiO 2 )-based dye-sensitized solar cell (DSSC) in 1991 [ 1 ], the DSSC has emerged as a promising photovoltaic device, due to its promising power conversion efficiency (PCE), low fabrication cost, and low toxicity [ 2 , 3 , 4 , 5 ]. Hitherto, it has been reported that TiO 2 -based DSSCs achieved a notable PCE of over 14% [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Titanium Dioxide-Coated Zinc Oxide Nanorods as an Efficient Photoelectrode in Dye-Sensitized Solar Cells

Zhang

Hou

2020

Nanomaterials

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Well-arrayed zinc oxide nanorods applied as photoelectrodes for dye-sensitized solar cells were synthesized on an aluminum-doped zinc oxide substrate by the multi-annealing method. In order to improve the chemical stability and surface-to-volume ratio of photoanodes in dye-sensitized solar cells, the synthesized zinc oxide nanorods were coated with pure anatase phase titanium dioxide film using a novel mist chemical vapor deposition method. The effects of the titanium dioxide film on the morphological, structural, optical, and photovoltaic properties of zinc oxide–titanium dioxide core–shell nanorods were investigated. It was found that the diameter and surface-to-volume ratio of zinc oxide nanorods were significantly increased by coating them with titanium dioxide thin film. The power conversion efficiency of dye-sensitized solar cells was improved from 1.31% to 2.68% by coating titanium dioxide film onto the surface of zinc oxide nanorods.

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Section: Introductionmentioning

confidence: 99%

Titanium Dioxide-Coated Zinc Oxide Nanorods as an Efficient Photoelectrode in Dye-Sensitized Solar Cells

Zhang

Hou

2020

Nanomaterials

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“…It is observed that all the films exhibit low absorbance in the visible region of the solar spectrum. Usually, TiO 2 shows the characteristic spectrum with its fundamental absorption of Ti-O bond in UV region between 320 and 400 nm [37] with characteristic peak around 350 nm (band edge) for TiO 2 [38]. Whereas naturally prepared chlorophyll dye exhibits maximum absorption at 413 and 665 nm in visible region.…”

Section: Optical Absorption Spectroscopymentioning

confidence: 99%

Layer-by-layer deposition of TiO2–ZrO2 electrode sensitized with Pandan leaves: natural dye-sensitized solar cell

Pawar

Baviskar

Inamuddin

et al. 2019

Mater Renew Sustain Energy

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TiO 2 , ZrO 2 and layer-by-layer TiO 2-ZrO 2 films were prepared by doctor blade method followed by sensitization with natural dye for dye-sensitized solar cell application. The structural and optical, morphological and compositional properties were investigated by X-ray diffraction and UV-Vis spectroscopy, scanning electron microscopy, BET, surface profilometer and energy-dispersive X-ray analyzer, respectively. Dye-sensitized solar cells were fabricated using the prepared electrodes of TiO 2 , ZrO 2 and layer-by-layer TiO 2-ZrO 2 films sensitized with natural dye extracted from Pandan leaves (Pandanus amaryllifolius). The J-V characteristics were recorded to measure photo-response of fabricated devices and electrochemical impedance spectroscopy to study the electron behavior, series resistance and lifetime. Photovoltaic parameter like shortcircuit current, open-circuit voltage, fill factor, and power conversion efficiency were evaluated for fabricated solar cell under artificial light supplied from white LED (15 mW·cm −2). The average values of power conversion efficiency of DSSCs fabricated with TiO 2 , ZrO 2 and layer-by-layer TiO 2-ZrO 2 photoanodes were found to be 0.65%, 3.04% and 3.13%, respectively.

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“…Various studies have used natural dye substances containing the compounds of anthocyanins, flavonoids, alkaloids, and chlorophylls extracted from the flowers, leaves, and roots of different plants to make DSSCs 32‐35 . Today, the use of nanoparticles and quantum dots has received a great deal of attention in many scientific fields and for enhancing the efficiency of SCs 36‐40 …”

Section: Introductionmentioning

confidence: 99%

“…[32][33][34][35] Today, the use of nanoparticles and quantum dots has received a great deal of attention in many scientific fields and for enhancing the efficiency of SCs. [36][37][38][39][40] Fang et al attempted to improve the efficiency of DSSCs using the graphene quantum dot on synthetic DSSCs N719. They showed that the graphene quantum dot increases the electron flux inside the SC cycle and reduces the electron recombination.…”

Section: Introductionmentioning

confidence: 99%

Effect of zinc oxide quantum dots on the photovoltaic properties of natural dye‐sensitized solar cells

2020

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Summary Natural dyes are used as solar‐sensitive materials to construct environmentally friendly solar cells. The low efficiency of natural dyes is one of their limitations in solar cells. To solve this problem, zinc oxide quantum dots have been used as an improving agent in the development of environmentally friendly solar cells. In the current study, natural dyes were extracted from Cytisus, Alcea rosea, and Roselle flowers using the solvent method. Then, the zinc oxide quantum dots (ZnO QDs) were synthesized through co‐precipitation in ethanol solutions. Subsequently, dye‐sensitized solar cells (DSSC) were made using the extracted dyes, and zinc oxide quantum dots were used to enhance the efficiency of the solar cells. Ultraviolet‐visible (UV‐Vis) spectrophotometry and Fourier transform infrared (FTIR) spectroscopy were used to study the absorption spectra of the extracted dyes and their functional groups. X‐ray diffraction (XRD), transmission electron microscopy (TEM), dynamic light scattering (DLS), and photoluminescence (PL) methods were used to characterize the crystal structure, size, particle size distribution, and emission intensity of the synthesized quantum dots, respectively. TEM, DLS, and PL analyses showed that the particle size of the quantum dots in the optimized sample was about 3 nm, and the maximum emission intensity was equal to 1550 at 520 nm. Field emission scanning electron microscopy (FESEM) and energy dispersive X‐ray spectroscopy (EDS) were used to determine glass, fluorine‐doped tin oxide (FTO), TiO2, ZnO QDs, and dye layers separately. Electrochemical impedance spectroscopy (EIS) was used to evaluate the resistance of solar cells. The properties of the modified solar cells were also investigated using the photovoltaic and incident photon to current conversion efficiency (IPCE) methods. The efficiency of the solar cell was equal to 0.983% with an open‐circuit voltage (Voc) of 0.648 (V), short‐circuit current (Jsc) of 2.251 (mA/cm2), fill factor (FF) of 0.647, and IPCE value of 21.662%. The results indicated that the modified solar cells performed better than the unmodified cells, and the use of quantum dots increased the efficiency of environmentally friendly solar cells by 17%.

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Template assisted nanoporous TiO2 nanoparticles: The effect of oxygen vacancy defects on photovoltaic performance of DSSC and QDSSC

Cited by 49 publications

References 42 publications

Titanium Dioxide-Coated Zinc Oxide Nanorods as an Efficient Photoelectrode in Dye-Sensitized Solar Cells

Titanium Dioxide-Coated Zinc Oxide Nanorods as an Efficient Photoelectrode in Dye-Sensitized Solar Cells

Layer-by-layer deposition of TiO2–ZrO2 electrode sensitized with Pandan leaves: natural dye-sensitized solar cell

Effect of zinc oxide quantum dots on the photovoltaic properties of natural dye‐sensitized solar cells

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