TY - JOUR
T1 - Graphene-titania films by supersonic kinetic spraying for enhanced performance of dye-sensitized solar cells
AU - Kim, Do Yeon
AU - Joshi, Bhavana N.
AU - Park, Jung Jae
AU - Lee, Jong Gun
AU - Cha, You Hong
AU - Seong, Tae Yeon
AU - In Noh, Suk
AU - Ahn, Hyo Jin
AU - Al-Deyabe, Salem S.
AU - Yoon, Sam S.
PY - 2014
Y1 - 2014
N2 - Graphene-titania films were fabricated by supersonic kinetic spray, known as aerosol deposition. Graphene concentration was varied to fabricate 0.1, 0.3, 0.5, 0.7, and 1.0 wt% G-TiO2 films for dye-sensitized solar cell (DSSC) application and to investigate the effect of graphene concentration on their energy conversion efficiency. The G-TiO2 films were characterized and analyzed based on results from SEM, XRD, XPS, TEM, and the current-voltage curve. The optimal concentration was 0.3 wt%, which decreased the recombination rate, favoring the formation of photogenerated electron-hole pairs. As a result, the conversion efficiency was 5.02% while that of the pure TiO2 was 3.14%. A clear trend per various concentrations was observed. At higher concentrations than 0.3 wt%, the conversion efficiency decreased owing to higher absorption of light by graphene present on the surface, thus reducing the generation of electron-hole pairs.
AB - Graphene-titania films were fabricated by supersonic kinetic spray, known as aerosol deposition. Graphene concentration was varied to fabricate 0.1, 0.3, 0.5, 0.7, and 1.0 wt% G-TiO2 films for dye-sensitized solar cell (DSSC) application and to investigate the effect of graphene concentration on their energy conversion efficiency. The G-TiO2 films were characterized and analyzed based on results from SEM, XRD, XPS, TEM, and the current-voltage curve. The optimal concentration was 0.3 wt%, which decreased the recombination rate, favoring the formation of photogenerated electron-hole pairs. As a result, the conversion efficiency was 5.02% while that of the pure TiO2 was 3.14%. A clear trend per various concentrations was observed. At higher concentrations than 0.3 wt%, the conversion efficiency decreased owing to higher absorption of light by graphene present on the surface, thus reducing the generation of electron-hole pairs.
KW - Aerosol deposition
KW - Dye-sensitized solar cell
KW - Graphene-titania
KW - Supersonic kinetic spraying
UR - http://www.scopus.com/inward/record.url?scp=84900499403&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2014.03.131
DO - 10.1016/j.ceramint.2014.03.131
M3 - Article
AN - SCOPUS:84900499403
SN - 0272-8842
VL - 40
SP - 11089
EP - 11097
JO - Ceramics International
JF - Ceramics International
IS - 7 PART B
ER -
