TiO2–SrTiO3 composite photoanode: effect of strontium precursor concentration on the performance of dye-sensitized solar cells
We report herein a detailed study on the influence of Sr precursor (strontium chloride hexahydrate) concentration on the properties of TiO 2 –SrTiO 3 composite film and dye-sensitized solar cells (DSSCs) performance. TiO 2 –SrTiO 3 composite film has successfully been fabricated by two steps of LPD-...
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Published in | Applied physics. A, Materials science & processing Vol. 125; no. 1; pp. 1 - 11 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Berlin/Heidelberg
Springer Berlin Heidelberg
2019
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | We report herein a detailed study on the influence of Sr precursor (strontium chloride hexahydrate) concentration on the properties of TiO
2
–SrTiO
3
composite film and dye-sensitized solar cells (DSSCs) performance. TiO
2
–SrTiO
3
composite film has successfully been fabricated by two steps of LPD-hydrothermal method for which the prepared TiO
2
acted as a Ti source for SrTiO
3
. Besides anatase, SrTiO
3
phase with cubic structure is detected from the XRD spectra confirming the formation of TiO
2
–SrTiO
3
film composite. The detection of the peak of Sr element from EDX and Raman shift at the peak of 436 cm
− 1
, 554 cm
− 1
and 799 cm
− 1
further confirms the existence of the SrTiO
3
coated on TiO
2
. TiO
2
–SrTiO
3
composite film with Sr precursor optimum concentration 0.1 M depicts the highest performance of the DSSC with the
η
= 1.71 ± 0.21%,
V
oc
= 0.58 ± 0.22 V and
J
sc
= 9.1 ± 2.1 mA/cm
2
due to superior lights scattering and highest dye loading. Facile charge transfer was observed by increasing the Sr content due to inhibition of recombination process. Combining TiO
2
with SrTiO
3
in composite form at the optimum Sr precursor concentration is found as an effective way of enhancing the efficiency of the device. |
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ISSN: | 0947-8396 1432-0630 |
DOI: | 10.1007/s00339-018-2344-4 |