Graphene quantum dots decorated electrospun TiO2 nanofibers as an effective photoanode for dye sensitized solar cells

Salam, Zaahir; Vijayakumar, E.; Angaiah, Subramania; Sivasankar, N.; Mallick, Sudhanshu

doi:10.1016/j.solmat.2015.07.001

Cited by 98 publications

(25 citation statements)

References 39 publications

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“…The D band is ascribed to edges, defects, and disordered carbon, whereas the G band arises from the zone-center E 2g mode, corresponding to the ordered sp 2 -bonded carbon atoms [28]. The 2D band is the second order of zone-boundary phonons, and the shape and position of the 2D band are sensitive to the number of layers of graphene sheets and chemical doping [31]. The presence of D, G, and 2D bands in RGO-decorated TiO 2 nanofilms indicates a strong interaction between RGO and TiO 2 nanofilms which means that they can work in unison to effectively influence the conduction of charge carriers through them.…”

Section: Characterization Of Rgo-tio 2 Photoanodementioning

confidence: 99%

A detailed investigation on the performance of dye-sensitized solar cells based on reduced graphene oxide-doped TiO2 photoanode

et al. 2017

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The sintered TiO 2 nanofilms were immersed in the aqueous solution of graphite oxide and then were thermally reduced to reduced graphene oxide (RGO), resulting in RGO-doped TiO 2 photoanodes employed in the dye-sensitized solar cells (DSSCs). This preparation method for the reduced graphene oxide-TiO 2 (RGO-TiO 2 ) photoanode could avoid the loss of RGO during the sintering process. The presence of RGO in the photoanodes was confirmed using Raman analysis, scanning electron microscopy, transmission electron microscopy, and energy-dispersive spectrometer. The amount of RGO in photoanode was obtained by thermo-gravimetric analysis. Other techniques such as X-ray diffraction, Brunauer-Emmett-Teller, electron energy loss spectroscopy, and X-ray photoelectron spectroscopy were used to characterize the composite materials of RGO-TiO 2 . The J-V measurement of RGO-TiO 2 -based DSSCs showed that the best photoelectric conversion efficiency (g) of 6.85% is 11.7% higher than that of the pure TiO 2 (P25-TiO 2 )-based DSSCs. It was shown that RGO in the photoanode could facilitate the phase transition in TiO 2 crystals (from anatase to rutile) resulting in the mixed crystals in the photoanodes. The existence of RGO and mixed-crystal structure of TiO 2 changed the electronic transmission pathway, reduced the recombination rate of electron-hole pairs, and thus improved the g of DSSCs.

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Section: Characterization Of Rgo-tio 2 Photoanodementioning

confidence: 99%

A detailed investigation on the performance of dye-sensitized solar cells based on reduced graphene oxide-doped TiO2 photoanode

et al. 2017

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“…In addition, Salam et al . used graphene quantum‐dot modified electrostatic spun photo‐anode to obtain the TiO 2 photo‐anode films, and they discovered that the PCE of this kind of photo‐anode increased to 6.33% than the pure TiO 2 thin films . These results indicate that doping graphene materials indeed improve the photoelectric characteristics of DSSC.…”

Section: Tio2 Photo‐anode Films Prepared By Electrospinningmentioning

confidence: 99%

Recent progress in electrospinning TiO₂ nanostructured photo‐anode of dye‐sensitized solar cells

Wan

Ramakrishna

Liu

2017

J of Applied Polymer Sci

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The key to improving the performance of dye-sensitized solar cells is the photo-anode that has much dye adsorption and short optoelectronic transmission path. Electrospun TiO 2 films in photo-anode have high specific surface area and meet the demand exactly. The article summarizes these efforts in TiO 2 photo-anode improvement, including various morphology, different onedimensional and two-dimensional composite structure, and varied element doped TiO 2 photo-anode. Besides, the review makes comparison with these different TiO 2 photo-anodes in photoelectric properties. The conclusions provide a clear guidance in design of morphology, structure, and doping, which is helpful for researcher to improve the performance of the anode and increase the photoelectric conversion efficiency especially those prepared using electrospinning. V C 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45649.

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“…Although that study superseded in decreasing the Oxygen level, the Titanium level dramatically decreased to 7.40%. Plus, that high chemical method employed with higher firing temperatures (540 ºC -700 ºC) Another a study of CQD [25,26] a) The previous study of CQD did not provide the Atomic% of the EDS measurement. b) The previous study of Nitrogen-Doped TiO2/Graphene Nanohybrids did not provide the weight percentage of the EDS measurement.…”

Section: Energy Dispersive Spectroscopy (Eds)mentioning

confidence: 99%

Oxygen free graphene/TiO2 nanocomposite synthesis technique for dye-sensitized solar cells photo-anode

AlSultan

Mustafa

Shafie

et al. 2020

IJEECS

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This article presents the techniques for the synthesis of oxygen-free graphene for doped in titanium dioxide TiO2. This work hypothesised the introduction of a new method for incorporating graphene nanoplatelets GNP in Anatase TiO2 using adhesive nanocomposite material, which has been done to enhance the conductivity of the nanocomposite. This work also argues with lamina problems in Graphene oxide, which reduce electron mobility and cause the electron pathways to be rerouted. The characteristics of the nanocomposite measure the colour difference, the photocurrent-voltage measurement (I-V measurement), Raman Spectroscopy, and Energy Dispersive Spectroscopy EDS. Simple visual observation results for various thin films show a colour shade difference due to the better dispersion of the nanocomposites. The uniform colour change with different weight ratios can also show the distribution of graphene sheets. Similarly, similar ratios to photocurrent-voltage readings were obtained by the different nanocomposite weights in I-V measurement. The Raman spectroscopy also recognises the existence of well-composed 2D energy band GNP sheets cooperated inside the TiO2. Finally, the work concludes with the reduction of the oxygen in weight ratios atomic, which lead to a better atomic level and the optimal weight ratio of GNP sheets to Titanium to increase the free mobility of electrons.

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Graphene quantum dots decorated electrospun TiO2 nanofibers as an effective photoanode for dye sensitized solar cells

Cited by 98 publications

References 39 publications

A detailed investigation on the performance of dye-sensitized solar cells based on reduced graphene oxide-doped TiO2 photoanode

A detailed investigation on the performance of dye-sensitized solar cells based on reduced graphene oxide-doped TiO2 photoanode

Recent progress in electrospinning TiO₂ nanostructured photo‐anode of dye‐sensitized solar cells

Oxygen free graphene/TiO2 nanocomposite synthesis technique for dye-sensitized solar cells photo-anode

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Graphene quantum dots decorated electrospun TiO2 nanofibers as an effective photoanode for dye sensitized solar cells

Cited by 98 publications

References 39 publications

A detailed investigation on the performance of dye-sensitized solar cells based on reduced graphene oxide-doped TiO2 photoanode

A detailed investigation on the performance of dye-sensitized solar cells based on reduced graphene oxide-doped TiO2 photoanode

Recent progress in electrospinning TiO2 nanostructured photo‐anode of dye‐sensitized solar cells

Oxygen free graphene/TiO2 nanocomposite synthesis technique for dye-sensitized solar cells photo-anode

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Recent progress in electrospinning TiO₂ nanostructured photo‐anode of dye‐sensitized solar cells