TY - JOUR
T1 - Effects of TiCl4 post-treatment on the efficiency of dye-sensitized solar cells
AU - Nath, Narayan Chandra Deb
AU - Subramanian, Alagesan
AU - Hu, Rui Yuan
AU - Lim, Beong Ou
AU - Lee, Jae Joon
N1 - Publisher Copyright:
Copyright © 2015 American Scientific Publishers All rights reserved.
PY - 2015/11/1
Y1 - 2015/11/1
N2 - The effects of compact TiO2 overlayers, deposited on TiO2 photoelectrodes through the hydrolysis of TiCl4, on the overall performance of dye-sensitized solar cells (DSSCs) were investigated. A thermal treatment at high-enough temperature was required for a more effective and higher dye-loading of the compact TiO2 overlayers. This led to improvements in the crystallinity and porosity of the layer, which contributed to higher power conversion efficiencies (PCE) of DSSCs compared with the electrodes prepared at relatively lower temperatures. Moreover, the existence of an additional secondary overlayer led to an increase in the net PCE of the cells by increasing the amount of dye-loading, even though this layer itself, in the absence of a first overlayer formed under high thermal treatment, did not enhance cell efficiency, because of the higher charge transport resistance over the layers and an increase in surface states.
AB - The effects of compact TiO2 overlayers, deposited on TiO2 photoelectrodes through the hydrolysis of TiCl4, on the overall performance of dye-sensitized solar cells (DSSCs) were investigated. A thermal treatment at high-enough temperature was required for a more effective and higher dye-loading of the compact TiO2 overlayers. This led to improvements in the crystallinity and porosity of the layer, which contributed to higher power conversion efficiencies (PCE) of DSSCs compared with the electrodes prepared at relatively lower temperatures. Moreover, the existence of an additional secondary overlayer led to an increase in the net PCE of the cells by increasing the amount of dye-loading, even though this layer itself, in the absence of a first overlayer formed under high thermal treatment, did not enhance cell efficiency, because of the higher charge transport resistance over the layers and an increase in surface states.
KW - Dye-loading
KW - Dye-sensitized solar cells
KW - Surface states
KW - TiCl post-treatment
KW - TiO Photoelectrodes
UR - http://www.scopus.com/inward/record.url?scp=84944873441&partnerID=8YFLogxK
U2 - 10.1166/jnn.2015.11528
DO - 10.1166/jnn.2015.11528
M3 - Article
AN - SCOPUS:84944873441
SN - 1533-4880
VL - 15
SP - 8870
EP - 8875
JO - Journal of Nanoscience and Nanotechnology
JF - Journal of Nanoscience and Nanotechnology
IS - 11
ER -