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Hybrid nanostructures in third generation solar cells (3G)


This project involves the study, characterization and insertion of new materials and hybrid nanostructures in third generation (3G) solar cells in order to obtain efficiency values higher than 5%. It is understood that 3G photovoltaic technology developed after the solar cells based on ultra-pure crystals with minimum defects such as silicon and GaAs (first generation) and thin films, but with more defects in CdS / CdTe, amorphous silicon and Cd-In-Ga If or CIGS (second generation). The solar cell composed of TiO2/dye or Grätzel solar cells are also part of generation 3G, but will not be discussed here. Solar cells of third generation 3G addressed in this project are based on hybrid nanostructures formed by mixtures or nanoscale multilayers (usually bilayers) of conducting polymers, conjugated organic macromolecules, carbonaceous materials such as graphene and carbon nanotubes with inorganic materials such as silicon wafers, chalcogenide nanoparticles (mainly PbS), and films of TiO2 and ZnO. Furthermore, this project also addresses the preparation and characterization of hybrid solar cells of the perovskite CH3NH3PbX3 (X = Cl, Br, I). To achieve a given goal, the specific objectives are: 1 Synthesis and characterization of PbSe and PbS nanoparticles and their films with conductive polymers following: P3HT, PCDTBT, PTB7, PSBTBT. The focus will be on studies of morphology with surface modification of nanoparticles and studies of charge transfer (energy transfer versus electron transfer) by time-resolved spectroscopic techniques; 2 Preparation and characterization of hybrid perovskites solar cell of CH3NH3PbX3 (X = Cl, Br, I) (standard literature solar cell) containing as a carrier hole (HTM, hole transport materials) the macromolecule 2,2 ', 7 7 '-tetrakis (N, N-di-p-methoxyphenylamine) -9,9 -spirobifluoreno) (spiro-MeOTAD) with high efficiency. 3 Introduction of new hole conducting materials based on conducting polymers derived from polyaniline and PoAni, modified or not with graphene oxide and also studies of surface treatment of TiO2 nanoparticles with nanometric layers of Al2O3, MgO, Nb2O5 and SrTiO3 aimed at decrease recombination between the HTM and the perovskites. 4 Synthesis and characterization of macromolecules based on modified perylene with thiophene groups, reduced graphene oxide modified with thiophene groups and carbon nanotubes (MWCNT) and their application in hybrid solar cells with n-type or p-type silicon wafer. (AU)

Articles published in Pesquisa FAPESP Magazine about the research grant:
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Scientific publications
(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)
SZOSTAK, RODRIGO; CASTRO, JHON A. P.; MARQUES, ADRIANO S.; NOGUEIRA, ANA F. Understanding perovskite formation through the intramolecular exchange method in ambient conditions. JOURNAL OF PHOTONICS FOR ENERGY, v. 7, n. 2 APR-JUN 2017. Web of Science Citations: 6.
CASTANEDA, JUAN A.; NAGAMINE, GABRIEL; YASSITEPE, EMRE; BONATO, LUIZ G.; VOZNYY, OLEKSANDR; HOOGLAND, SJOERD; NOGUEIRA, ANA F.; SARGENT, EDWARD H.; BRITO CRUZ, CARLOS H.; PADILHA, LAZARO A. Efficient Biexciton Interaction in Perovskite Quantum Dots Under Weak and Strong Confinement. ACS NANO, v. 10, n. 9, p. 8603-8609, SEP 2016. Web of Science Citations: 45.

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