Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/10877
Title: Enhanced efficiencies in thin and semi-transparent dye-sensitized solar cells under low photon flux conditions using TiO2 nanotube photonic crystal
Authors: Xie, K
Guo, M
Liu, X
Huang, H 
Keywords: Low photon flux condition
Photoanode
Thin and semi-transparent dye-sensitized solar cells
TiO2 nanotube photonic crystal
Issue Date: 2015
Publisher: Elsevier
Source: Journal of power sources, 2015, v. 293, 21185, p. 170-177 How to cite?
Journal: Journal of power sources 
Abstract: Abstract The photovoltaic output of dye-sensitized solar cells (DSSCs) are greatly dependent on the amount of absorbed photons, which is limited by the thickness of active layer of DSSCs and the illumination conditions. To improve the cell performance under low irradiance condition, a photoanode was designed by attaching a TiO2 nanotube photonic crystal (NTPC) onto the thin TiO2 nanoparticle (NP) layer for applications in thin and semi-transparent DSSCs. It is found that the introduction of the TiO2 NTPC significantly increases the light harvesting and hence the power conversion efficiency (PCE) of the respective DSSCs. The TiO2 NTPC provides multi-functionalities, such as Bragg reflection, light scatting and additional light harvesting from its nanotube structure, leading to more significant light harvesting enhancement in these thin and semi-transparent DSSCs. Compared with the single-layer TiO2 NP based reference DSSCs, the above-mentioned synergic effects in a cell incoporated with a ∼2.3-μm-thick TiO2 NTPC yield PCE enhancements up to 99.1% and 130%, under 1 and 0.5 Sun conditions, respectively. Meanwhile, an obvious compensation effect of TiO2 NTPC to reduce the output power drop of these cells under tilted incient light is also demonstrated. The work will boost the practical applications of PC in irradiance sensitive devices.
URI: http://hdl.handle.net/10397/10877
ISSN: 0378-7753
EISSN: 1873-2755
DOI: 10.1016/j.jpowsour.2015.05.025
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