Study on the Performance of Zn,N/TiO2 Anode Film and Co-Sensitization in DSSC

Zhang, Jingchang; Fu, Chengyu; Yang, Xiuying; Cao, Wei

doi:10.1007/s10904-010-9416-z

Cited by 15 publications

(9 citation statements)

References 36 publications

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“…This makes transition metals suitable materials to tune the CB structure. The transition metals discussed here are scandium, 152 vanadium, [153][154][155] chromium, 83,[156][157][158][159] manganese, [160][161][162] iron, 163,164 cobalt, 160,162 nickel, [165][166][167] copper, 162,168,169 zinc, 90,126,130,161,[170][171][172][173][174][175][176][177][178] yttrium, [179][180][181] zirconium, 102,140,[182][183][184] niobium, 44,60,70,71,102,154,[185][186]…”

Section: Transition Metalsmentioning

confidence: 99%

“…The electron density and transport rate were increased, leading to higher values of J SC . 171,172 By reducing recombination and increasing surface area and dye adsorption a massive increase in efficiency could be achieved, 173,174 but the negative shift of V FB can lead to severely decreased electron injection and J SC . 175 In contrast, other studies reported a positively shifted V FB (Fig.…”

Section: Transition Metalsmentioning

confidence: 99%

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Doping of TiO₂for sensitized solar cells

2015

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This review gives a detailed summary and evaluation of the use of TiO2 doping to improve the performance of dye sensitized solar cells. Doping has a major effect on the band structure and trap states of TiO2, which in turn affect important properties such as the conduction band energy, charge transport, recombination and collection. The defect states of TiO2 are highly dependent on the synthesis method and thus the effect of doping may vary for different synthesis techniques, making it difficult to compare the suitability of different dopants. High-throughput methods may be employed to achieve a rough prediction on the suitability of dopants for a specific synthesis method. It was however found that nearly every employed dopant can be used to increase device performance, indicating that the improvement is not so much caused by the dopant itself, as by the defects it eliminates from TiO2. Furthermore, with the field shifting from dye sensitized solar cells to perovskite solar cells, the role doping can play to further advance this emerging field is also discussed.

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Section: Transition Metalsmentioning

confidence: 99%

Section: Transition Metalsmentioning

confidence: 99%

Doping of TiO₂for sensitized solar cells

2015

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“…Co-sensitization has been useful to increase PCE (%) of DSSCs. Co-sensitization of N719 dye with organic dyes has enhanced the spectral range from the visible to near-infrared (NIR) region in order to increase the absorption on TiO 2 ( Zhang et al, 2011 ; Elangovan and Venkatachalam, 2015 ; Luo et al, 2016 ; Mazloum-Ardakani and Arazi, 2019 ; Wu et al, 2020 ). It is also useful to co-sensitize two metal-complex dyes, but they usually have bulky groups, which makes the utilization of active sites on the semiconductor less effective.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Investigation on Vacancy Filling by Small Molecules on the Performance of Dye-Sensitized Solar Cells: The Case of a Type-II Absorber

et al. 2021

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The steric shielding offered by sensitizers on semiconducting surfaces as a result of branching in the dyes used offers the less utilization of semiconducting substrate sites during device fabrication in dye-sensitized solar cells (DSSCs). This work proposes a strategy to increase the coverage through the utilization of small molecules which have the ability to penetrate into the sites. The small molecules play the dual role of vacancy filling and sensitization, which can be viewed as an alternative to co-sensitization also. Hence, we show for the first time ever that the co-adsorption of catechol with Z907 as a sensitizer enhances the electron density in the photo-anode by adsorbing on the vacant sites. Catechol was subsequently adsorbed on TiO2 after Z907 as it has a stronger interaction with TiO2 owing to its favorable thermodynamics. The reduced number of vacant sites, suppressed charge recombination, and enhanced spectral response are responsible for the improvement in the PCEs. Quantitatively, both organic and aqueous electrolytes were used and the co-sensitized DSSCs had PCE enhancements of 7.2 and 60%, respectively, compared to the control devices.

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“…To improve the situation, many methods have been introduced, including doping with some metal and non-metal elements such as Zn 2+ , Fe 3+ , and N À . [5][6][7][8] Among those, N-doped TiO 2 can produce the most signicant effect.…”

Section: Introductionmentioning

confidence: 99%