Effects of multi-element dopants of TiO2 for high performance in dye-sensitized solar cells

Im, Ji Sun; Yun, Jumi; Lee, Sung Kyu; Lee, Young-Seak

doi:10.1016/j.jallcom.2011.11.011

Cited by 7 publications

(4 citation statements)

References 45 publications

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“…enhanced the efficiency of DSSCs, as reported by Im et al (2012). This enhancement was attributed to a reduction in the recombination of electrons (in the conduction band of TiO 2 ) with the dye and/or electrolyte.…”

Section: Doping Of Tio 2 With Multielements (B C N and F)supporting

confidence: 67%

Effect of Doping a Rare-Earth Oxide on the Photovoltaic Parameters of Dye -Sensitized Solar Cells.

El-Hamalawy

Elkholy

Ali

2016

Journal of Bioscience and Applied Research

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Yb 2 O 3-doped TiO 2 were prepared using mechanochemical process to obtain Dye Sensitized Solar Cells (DSSCs) photoanodes. The parameters of DSSC devices were calculated. The study showed that the addition of Yb 2 O 3 improved the open-circuit voltage via a p-type effect, whereas, a negative effect on the generated photocurrent was observed. This reduction in photocurrent was attributed to increasing crystal defects as a result of increasing the concentration of Yb 2 O 3 dopants.

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Section: Doping Of Tio 2 With Multielements (B C N and F)supporting

confidence: 67%

Effect of Doping a Rare-Earth Oxide on the Photovoltaic Parameters of Dye -Sensitized Solar Cells.

El-Hamalawy

Elkholy

Ali

2016

Journal of Bioscience and Applied Research

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“…A number of PCSCs have been fabricated which have different concentrations of carbon in the photo anodes. These types of photo anodes built with two or more nonmetals have attracted new attention with advantages ranging from improved spectral response, reduced electron hole recombination and amplified electron transport as compared to single type electrodes such pure anatase TiO 2 [5] [19] [20]. The synthesized PCSCs were structurally, morphologically and optically characterized and its photovoltaic properties were evaluated in this work.…”

Section: Introductionmentioning

confidence: 99%

Carbon Doped Nano-Crystalline TiO<sub>2</sub> Photo-Active Thin Film for Solid State Photochemical Solar Cells

Taziwa¹,

Meyer²

2014

ANP

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Carbon doped titanium dioxide (C-TiO2) is considered as a promising photocatalytic material due to its optical absorption extended in the visible region compared to pure TiO2. However, in the field of photovoltaic's, use of C-doped nano-crystalline titanium dioxide (C-TiO2) electrodes for light absorption has been considered to be unnecessary so far. In this context, we report here on the use of C-TiO2 nano-crystalline electrodes in photochemical solar cells devices (PCSC). Carbon doping has reduced the band gap of TiO2 to 2.41 eV and 2.25 eV with increase in the doping extent for the 9 mM C-TiO2 and 45 mM C-TiO2 respectively. The C-TiO2 electrodes were first used as photo electrodes for solar cells, exhibiting JSC of 1.34651 mA/cm 2 , VOC 0.683 V, FF 50.23% and η 0.46%. for the 9 mM C-TiO2 and exhibiting JSC of 1.34651 mA/cm 2 , VOC 0.815 V, FF 54.3% and η 0.59% for the 45 mM C-TiO2. The fabricated solar cell devices have shown an increase in VOC of up to 0.815 V, which is higher than that of 0.7 V for dye sensitized solar cells. The doping of carbon in TiO2 lattice was closely studied by SEM, XRD, RS and UV-Vis spectroscopy.

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“…The upshift of the Fermi level in the ETL accelerates the electron transfer and reduces the recombination loss across the interfaces of QDs/HTL and ETL/HTL, which eventually results in the enhancement of V oc . Also, more negative flat-band potential and higher concentration of charge carriers as realized from the MS plot account for the observed enhanced V oc and J sc . − The observed deviations in the diode curve for the devices are attributed to the poor contacts at the HTL/CE interfaces, causing the lowering of shunt resistance; this can be overcome by engineering counter electrode materials. , The external quantum efficiencies (EQEs) of these devices were not obtained as a result of lower shunt resistance. , However, it can be anticipated that this limitation can be further overcome by engineering better deposition of hole transport material (HTM) onto CE.…”

Section: Resultsmentioning

confidence: 99%

Manifestation of the Enhanced Photovoltaic Performance in Eco-Friendly AgBiS₂ Solar Cells Using Titanium Oxynitride as the Electron Transport Layer

et al. 2022

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In this study, titanium oxynitride with empirical composition of TiON is developed using a sol−gel and ammoniagas-assisted thermal nitridation process. The obtained TiON phase is employed as the photoanodic electron transport layer (ETL) in a silver bismuth sulfide (AgBiS 2 ) quantum-dot-sensitized solar cell (QDSSC) device and compared to a QDSSC consisting of commercial TiO 2 as the ETL. The obtained X-ray photoelectron spectroscopy spectra and Mott−Schottky plots of the samples suggested that the valence and conduction bands of TiON are significantly shifted (E VB = 2.9 eV and E CB = −0.3 eV) with respect to that of TiO 2 (E VB = 1.88 eV and E CB = −0.51 eV), which eventually decreased its band gap energy to 2.46 eV compared to TiO 2 (3.2 eV). A decrease in the charge transfer resistance (R ct = 38.2 Ω) and improvement in carrier lifetime (τ = 5.3 ms) are observed in the developed TiON device. The work also endorses the use of eco-friendly green quantum dots of AgBiS 2 as photoabsorbers in solar cells. Although the photovoltaic performance is not found to be greater, the demonstration of the enhanced performance of the TiON-based device with ∼50% enhancements, owing to its improved open circuit voltage and current density by 20 and 35%, is achieved in this work. Titanium oxynitride can, hence, be considered a suitable alternative to existing commercial TiO 2 in all applications that involve solar energy conversion.

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Effects of multi-element dopants of TiO2 for high performance in dye-sensitized solar cells

Cited by 7 publications

References 45 publications

Effect of Doping a Rare-Earth Oxide on the Photovoltaic Parameters of Dye -Sensitized Solar Cells.

Effect of Doping a Rare-Earth Oxide on the Photovoltaic Parameters of Dye -Sensitized Solar Cells.

Carbon Doped Nano-Crystalline TiO<sub>2</sub> Photo-Active Thin Film for Solid State Photochemical Solar Cells

Manifestation of the Enhanced Photovoltaic Performance in Eco-Friendly AgBiS₂ Solar Cells Using Titanium Oxynitride as the Electron Transport Layer

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Effects of multi-element dopants of TiO2 for high performance in dye-sensitized solar cells

Cited by 7 publications

References 45 publications

Effect of Doping a Rare-Earth Oxide on the Photovoltaic Parameters of Dye -Sensitized Solar Cells.

Effect of Doping a Rare-Earth Oxide on the Photovoltaic Parameters of Dye -Sensitized Solar Cells.

Carbon Doped Nano-Crystalline TiO&lt;sub&gt;2&lt;/sub&gt; Photo-Active Thin Film for Solid State Photochemical Solar Cells

Manifestation of the Enhanced Photovoltaic Performance in Eco-Friendly AgBiS2 Solar Cells Using Titanium Oxynitride as the Electron Transport Layer

Contact Info

Product

Resources

About

Carbon Doped Nano-Crystalline TiO<sub>2</sub> Photo-Active Thin Film for Solid State Photochemical Solar Cells

Manifestation of the Enhanced Photovoltaic Performance in Eco-Friendly AgBiS₂ Solar Cells Using Titanium Oxynitride as the Electron Transport Layer