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Title: Dye-sensitized solar cell employing zinc oxide aggregates grown in the presence of lithium

Abstract

Provided are a novel ZnO dye-sensitized solar cell and method of fabricating the same. In one embodiment, deliberately added lithium ions are used to mediate the growth of ZnO aggregates. The use of lithium provides ZnO aggregates that have advantageous microstructure, morphology, crystallinity, and operational characteristics. Employing lithium during aggregate synthesis results in a polydisperse collection of ZnO aggregates favorable for porosity and light scattering. The resulting nanocrystallites forming the aggregates have improved crystallinity and more favorable facets for dye molecule absorption. The lithium synthesis improves the surface stability of ZnO in acidic dyes. The procedures developed and disclosed herein also help ensure the formation of an aggregate film that has a high homogeneity of thickness, a high packing density, a high specific surface area, and good electrical contact between the film and the fluorine-doped tin oxide electrode and among the aggregate particles.

Inventors:
;
Issue Date:
Research Org.:
Univ. of Washington, Seattle, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1176521
Patent Number(s):
8558107
Application Number:
13/021,520
Assignee:
University Of Washington
Patent Classifications (CPCs):
C - CHEMISTRY C09 - DYES C09C - TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
DOE Contract Number:  
FG02-07ER46467
Resource Type:
Patent
Resource Relation:
Patent File Date: 2011 Feb 04
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE

Citation Formats

Zhang, Qifeng, and Cao, Guozhong. Dye-sensitized solar cell employing zinc oxide aggregates grown in the presence of lithium. United States: N. p., 2013. Web.
Zhang, Qifeng, & Cao, Guozhong. Dye-sensitized solar cell employing zinc oxide aggregates grown in the presence of lithium. United States.
Zhang, Qifeng, and Cao, Guozhong. Tue . "Dye-sensitized solar cell employing zinc oxide aggregates grown in the presence of lithium". United States. https://www.osti.gov/servlets/purl/1176521.
@article{osti_1176521,
title = {Dye-sensitized solar cell employing zinc oxide aggregates grown in the presence of lithium},
author = {Zhang, Qifeng and Cao, Guozhong},
abstractNote = {Provided are a novel ZnO dye-sensitized solar cell and method of fabricating the same. In one embodiment, deliberately added lithium ions are used to mediate the growth of ZnO aggregates. The use of lithium provides ZnO aggregates that have advantageous microstructure, morphology, crystallinity, and operational characteristics. Employing lithium during aggregate synthesis results in a polydisperse collection of ZnO aggregates favorable for porosity and light scattering. The resulting nanocrystallites forming the aggregates have improved crystallinity and more favorable facets for dye molecule absorption. The lithium synthesis improves the surface stability of ZnO in acidic dyes. The procedures developed and disclosed herein also help ensure the formation of an aggregate film that has a high homogeneity of thickness, a high packing density, a high specific surface area, and good electrical contact between the film and the fluorine-doped tin oxide electrode and among the aggregate particles.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {10}
}

Works referenced in this record:

Photoelectric conversion device and method for producing same
patent-application, April 2002


Lithium ion as growth-controlling agent of ZnO nanoparticles prepared by organometallic synthesis
journal, January 2008


Nanocrystalline dye-sensitized solar cells having maximum performance
journal, January 2006


Effects of Dye Loading Conditions on the Energy Conversion Efficiency of ZnO and TiO 2 Dye-Sensitized Solar Cells
journal, November 2007


Solar Energy Conversion by Dye-Sensitized Photovoltaic Cells
journal, October 2005