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Title: The layer boundary effect on multi-layer mesoporous TiO 2 film based dye sensitized solar cells

Multi-layer mesoporous TiO 2 prepared by screen printing is widely used for fabrication of high-efficiency dye-sensitized solar cells (DSSCs). Here, we compare the three types of ~10 um thick mesoporous TiO 2 films, which were screen printed as 1-, 2- and 4-layers using the same TiO 2 nanocrystal paste. The layer boundary of the multi-layer mesoporous TiO 2 films was observed in the cross-section SEM. The existence of a layer boundary could reduce the photoelectron diffusion length with the increase of layer number. However, the photoelectron diffusion lengths of the Z907 dye sensitized solar cells based on these different layered mesoporous TiO 2 films are all longer than the film thickness. Consequently, the photovoltaic performance seems to have little dependence on the layer number of the multi-layer TiO 2 based DSSCs.
 [1] ;  [2] ;  [1]
  1. Shanghai Jiao Tong Univ. (China). School of Environmental Science and Engineering
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States). Chemical and Materials Science Center
Publication Date:
Report Number(s):
Journal ID: ISSN 2046-2069; RSCACL
Grant/Contract Number:
AC36-08GO28308; 51372151; 21303103; 151046
Accepted Manuscript
Journal Name:
RSC Advances
Additional Journal Information:
Journal Volume: 6; Journal Issue: 100; Journal ID: ISSN 2046-2069
Royal Society of Chemistry
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; dye-sensitized solar cells; DSSC; mesoporous films
OSTI Identifier: