Document Detail

Infiltration of polymer hole-conductor into mesoporous titania structures for solid-state dye-sensitized solar cells.
MedLine Citation:
PMID:  23273246     Owner:  NLM     Status:  Publisher    
The degree of filling of titania nanostructures with a solid hole-conducting material is important for the performance of solid-state dye-sensitized solar cells (ssDSSCs). Different ways to infiltrate the hole-conducting polymer poly(3-hexylthiophene) (P3HT) into titania structures, both, granular structures as they are already applied commercially, and tailored sponge nanostructures, are investigated. The solar cell performance is compared to the morphology determined with scanning electron microscopy (SEM) and time-of-flight grazing incidence small angle neutron scattering (TOF-GISANS). The granular titania structure, commonly used for ssDSSCs, shows a large distribution of particle and pore sizes, with porosities in the range from 41 % to 67 % including even dense parts without pores. In contrast, the tailored sponge nanostructure has well-defined pore sizes of 25 nm with an all-over porosity of 54 %. Filling of the titania structures with P3HT by solution casting results in a mesoscopic P3HT overlayer and consequently a bad solar cell performance, even though a filling ratio of 67 % is observed. For the infiltration by repeated spin-coating only 57 % pore filling is achieved, whereas filling by soaking in the solvent with subsequent spin-coating yields filling as high as 84 % in the case of the tailored titania sponge structures. The granular titania structure is filled less completely than the well-defined porous structures. The solar cell performance is increased with increasing filling ratio for these two ways of infiltration. Therefore, filling by soaking in the solvent with subsequent spin-coating is proposed.
Monika Rawolle; Kuhu Sarkar; Martin Niedermeier; Markus Schindler; Philipp Lellig; Jochen Stefan Gutmann; Jean-Francois Moulin; Martin Haese-Seiler; Angela Sandra Wochnik; Peter Muller-Buschbaum; Christina Scheu
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-12-31
Journal Detail:
Title:  ACS applied materials & interfaces     Volume:  -     ISSN:  1944-8252     ISO Abbreviation:  ACS Appl Mater Interfaces     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-31     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101504991     Medline TA:  ACS Appl Mater Interfaces     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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