TY - JOUR
T1 - Enhanced efficiency of over 10% in dye-sensitized solar cells through C and N single- and co-doped TiO2single-layer electrodes
AU - Asgari Moghaddam, H.
AU - Jafari, S.
AU - Mohammadi, M. R.
N1 - Funding Information:
M. R. Mohammadi wishes to thank the financial support from the Sharif University of Technology and the Iran National Science Foundation (INSF), and especially the financial support from the Niroo Research Institute (NRI) through a research grant.
Publisher Copyright:
© 2017 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2017/1/1
Y1 - 2017/1/1
N2 - Herein, we report the impact of single- and co-doping of nanoparticle TiO
2 films with carbon and nitrogen on the photovoltaic characteristics of their corresponding dye-sensitized solar cell (DSC) devices. Different DSCs with various compositions of the photoanode electrodes are fabricated to study their structural and electronic properties by X-ray diffraction (XRD), diffuse reflectance spectroscopy (DRS), field-emission scanning electron microscopy (FE-SEM), Brunauer-Emmett-Teller (BET) analysis and X-ray photoelectron spectroscopy (XPS). We find that the interstitial nitrogen atoms for single N doping have a greater impact on the band gap energy (E
g) than the substitutional (to Ti) carbon atoms for single C doping. The short circuit current and efficiency of DSCs are enhanced by C and N single- and co-doping with dominant impression of carbon doping. Furthermore, the electrochemical impedance spectroscopy (EIS) measurements reveal that the electron lifetime, charge transport and recombination resistance of DSCs are improved by C and N single- and co-doping with prominent impact of carbon doping. Therefore, we achieve the highest cell efficiency of 10.2% as a result of a balance between the band gap, surface area, and diffused reflection of the photoanode electrode.
AB - Herein, we report the impact of single- and co-doping of nanoparticle TiO
2 films with carbon and nitrogen on the photovoltaic characteristics of their corresponding dye-sensitized solar cell (DSC) devices. Different DSCs with various compositions of the photoanode electrodes are fabricated to study their structural and electronic properties by X-ray diffraction (XRD), diffuse reflectance spectroscopy (DRS), field-emission scanning electron microscopy (FE-SEM), Brunauer-Emmett-Teller (BET) analysis and X-ray photoelectron spectroscopy (XPS). We find that the interstitial nitrogen atoms for single N doping have a greater impact on the band gap energy (E
g) than the substitutional (to Ti) carbon atoms for single C doping. The short circuit current and efficiency of DSCs are enhanced by C and N single- and co-doping with dominant impression of carbon doping. Furthermore, the electrochemical impedance spectroscopy (EIS) measurements reveal that the electron lifetime, charge transport and recombination resistance of DSCs are improved by C and N single- and co-doping with prominent impact of carbon doping. Therefore, we achieve the highest cell efficiency of 10.2% as a result of a balance between the band gap, surface area, and diffused reflection of the photoanode electrode.
UR - http://www.scopus.com/inward/record.url?scp=85028025873&partnerID=8YFLogxK
U2 - 10.1039/c7nj01535f
DO - 10.1039/c7nj01535f
M3 - Article
SN - 1144-0546
VL - 41
SP - 9453
EP - 9460
JO - New Journal of Chemistry
JF - New Journal of Chemistry
IS - 17
ER -
