TY - JOUR
T1 - Morphological control of TiO2 nanocrystals by solvothermal synthesis for dye-sensitized solar cell applications
AU - Kathirvel, Sasipriya
AU - Pedaballi, Sireesha
AU - Su, Chaochin
AU - Chen, Bo Ren
AU - Li, Wen Ren
N1 - Publisher Copyright:
© 2020
PY - 2020/7/30
Y1 - 2020/7/30
N2 - TiO2 nanocrystals TETA1, TPRA2, TIPA3, TBUA4, TTBA5, and TBNA6 were prepared using ethanol, 1-propanol, isopropyl alcohol, n-butanol, tert-butyl alcohol, and benzyl alcohol, through the alcohol-based solvothermal method. The morphology, size, and crystallinity of the TiO2 nanocrystals were characterized utilizing transmission electron microscopy, scanning electron microscopy, X-ray diffraction, and high-resolution transmission electron microscopy analyses. These six TiO2 nanocrystals with different morphologies were used as photoanodes in dye-sensitized solar cells (DSSCs) and their cell efficiencies were 8.08% (TETA1), 8.38% (TPRA2), 9.18% (TIPA3), 7.68% (TBUA4), 7.85% (TTBA5), and 6.10% (TBNA6). Among them, the well dispersed rod-shaped one-dimensional TiO2 (TIPA3) photoanode based cell showed the best power conversion efficiency due to its highest dye loading and excellent light-harvesting capacity. This TIPA3 cell demonstrated a fast electron transport rate with suppressed charge recombination which was confirmed from electrochemical impedance spectroscopy.
AB - TiO2 nanocrystals TETA1, TPRA2, TIPA3, TBUA4, TTBA5, and TBNA6 were prepared using ethanol, 1-propanol, isopropyl alcohol, n-butanol, tert-butyl alcohol, and benzyl alcohol, through the alcohol-based solvothermal method. The morphology, size, and crystallinity of the TiO2 nanocrystals were characterized utilizing transmission electron microscopy, scanning electron microscopy, X-ray diffraction, and high-resolution transmission electron microscopy analyses. These six TiO2 nanocrystals with different morphologies were used as photoanodes in dye-sensitized solar cells (DSSCs) and their cell efficiencies were 8.08% (TETA1), 8.38% (TPRA2), 9.18% (TIPA3), 7.68% (TBUA4), 7.85% (TTBA5), and 6.10% (TBNA6). Among them, the well dispersed rod-shaped one-dimensional TiO2 (TIPA3) photoanode based cell showed the best power conversion efficiency due to its highest dye loading and excellent light-harvesting capacity. This TIPA3 cell demonstrated a fast electron transport rate with suppressed charge recombination which was confirmed from electrochemical impedance spectroscopy.
KW - Dye loading
KW - Dye-sensitized solar cells
KW - Power conversion efficiency
KW - Solvothermal synthesis
KW - TiO nanocrystals
UR - http://www.scopus.com/inward/record.url?scp=85082857811&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2020.146082
DO - 10.1016/j.apsusc.2020.146082
M3 - 文章
AN - SCOPUS:85082857811
SN - 0169-4332
VL - 519
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 146082
ER -