Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV18)
Publication date: 21st February 2018
After the first report of methylammonium lead iodide as a light harvester material in a solid-state solar cell, hybrid perovskite solar cells (PSCs) have become a subject of intensive research. Since then, the strategies followed for their optimization have resulted in a current certified efficiency of over 22%. Most of the studies on this topic have focused on the enhancement of the solar cell efficiency and stability, and on the development of innovative methods for their fabrication, however, our current understanding of the principles that govern their outstanding performance and atypical behavior is still lacking. Some of the puzzling aspects of PSCs include the dependence of the current-voltage characteristic upon scanning conditions, slow photoconductivity response under light irradiation, and giant switchable photovoltaic effect. So far, the proposed mechanisms to explain this behavior include internal polarization, charge trapping/detrapping, ferroelectric polarization and ion migration. Although many relevant results already exist on this matter, the debate remains open not only concerning to which of the proposed mechanisms fits the experimental results best, but also regarding the actual measure in which these effects are intrinsic to the perovskite material or derive from selective contacts and their interfaces.
In this context, the aim of this work is to contribute to this debate by investigating the effect of different electron selective materials on the general performance and small-perturbation response of mesoscopic perovskite solar cells. For this purpose, zinc stannate and different crystalline structures of titanium dioxide as well as the insulators zirconia and alumina were studied as electron transporting layers/scaffolds in the mesoscopic configuration. The perovskite films deposited on different materials were characterized through UV-Vis absorbance spectroscopy, steady state photoluminescence spectroscopy and scanning electron microscopy. The PSCs current- voltage curves were measured and the devices were further characterized with electrochemical impedance spectroscopy in order to compare recombination rates and time constants among the devices fabricated with the different materials studied.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.