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Preparation and characterization of TiO2 and ZnO nanoparticles composites containing carbonaceous materials and their application in solar cells

Grant number: 10/18656-1
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): March 01, 2011
Effective date (End): July 31, 2014
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal researcher:Ana Flávia Nogueira
Grantee:Andreia de Morais
Home Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil


Dye-sensitized solar cells (DSSC's) have attracted attention in recent years due to the promising energy conversion efficiency using cheap materials, its low production cost and easy preparation. However, many parameters of these devices need to be improved. For example, the electronic transport that occurs by diffusion through the semiconductor oxide film (normally TiO2 nanoparticles). The utilization of carbonaceous materials, such as graphene and carbon nanotubes are then incorporated in the oxide semiconductor, in DSSC's is a potential alternative that can be utilized to improve and enhance the electron transport, since these materials are recognized for their excellent conductive properties. Another problem presented by DSSC's is the use of liquid electrolytes which can cause leaks, solvent evaporation and decrease overall stability. Moreover, replacing the liquid electrolyte by hole conductive materials, polymers or molecules, inorganic or organic, is one of the alternatives that are being investigated and taken as the most promising.In this context, the purpose of this project is to develop DSSC's, where photoelectrodes based on nanocomposites formed by carbonaceous materials (graphene or multi-wall carbon nanotubes (MWCNT)) and semiconducting oxides nanoparticles (TiO2 or ZnO) prepared by different synthesis methods. Additionally, solid-state solar cells (DSSC) prepared using poly(3-hexyltiofeno) (P3HT) as hole conductor and small amounts of lithium ions, will be studied in order to investigate the performance and photoconversion efficiency of these cells.

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Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DE MORAIS, ANDREIA; LOIOLA, LIVIA M. D.; BENEDETTI, JOAO E.; GONCALVES, AGNALDO S.; AVELLANEDA, CESAR A. O.; CLERICI, JOAO H.; COTTA, MONICA A.; NOGUEIRA, ANA F.. Enhancing in the performance of dye-sensitized solar cells by the incorporation of functionalized multi-walled carbon nanotubes into TiO2 films: The role of MWCNT addition. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, v. 251, p. 78-84, . (10/18656-1, 06/58998-3)
RANGANATHAN, KAMALAKANNAN; MORAIS, ANDREIA; NONGWE, ISAAC; LONGO, CLAUDIA; NOGUEIRA, ANA F.; COVILLE, NEIL J.. Study of photoelectrochemical water splitting using composite films based on TiO2 nanoparticles and nitrogen or boron doped hollow carbon spheres as photoanodes. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, v. 422, n. SI, p. 165-174, . (10/18656-1)
MORAIS, ANDREIA; ALVES, JOAO PAULO C.; LIMA, FRANCISCO ANDERSON S.; LIRA-CANTU, MONICA; NOGUEIRA, ANA FLAVIA. Enhanced photovoltaic performance of inverted hybrid bulk-heterojunction solar cells using TiO2/reduced graphene oxide films as electron transport layers. JOURNAL OF PHOTONICS FOR ENERGY, v. 5, . (10/18656-1)
BENEDETTI, J. E.; BERNARDO, D. R.; MORAIS, A.; BETTINI, JEFFERSON; NOGUEIRA, A. F.. Synthesis and characterization of a quaternary nanocomposite based on TiO2/CdS/rGO/Pt and its application in the photoreduction of CO2 to methane under visible light. RSC ADVANCES, v. 5, n. 43, p. 33914-33922, . (10/18656-1)
MORAIS, ANDREIA; LONGO, CLAUDIA; ARAUJO, JOYCE R.; BARROSO, MONICA; DURRANT, JAMES R.; NOGUEIRA, ANA FLAVIA. Nanocrystalline anatase TiO2/reduced graphene oxide composite films as photoanodes for photoelectrochemical water splitting studies: the role of reduced graphene oxide. Physical Chemistry Chemical Physics, v. 18, n. 4, p. 2608-2616, . (10/18656-1)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)

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