Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
Despite a rapid rise in device record efficiencies, the level of understanding of the operation of perovskite solar cells is still some way behind. It is undoubtedly a promising material for the next-generation of commercially viable solar power generation, but for development to continue a number of issues need to be overcome. A better understanding of carrier transport and recombination processes will enable device architecture to be tuned for optimum performance. Also, an insight into the origins of the slow time response of these cells will help develop different material interfaces and reduce device hysteresis.
In this work, a range of complimentary characterisation techniques have been employed to study planar heterojunction devices. These techniques include electrochemical impedance spectroscopy, intensity modulated photovoltage/photocurrent spectroscopy and open-circuit photovoltage decay measurements. Of particular interest is the slow time/low frequency response when measured over a range of temperatures. These results show clear links to ionic diffusion within the devices, and provide good agreement with computational modelling. Evidence to support this includes the pronounced effect on open-circuit photovoltage decay rates even for a fairly modest range of temperatures. Activation energies calculated for this process agree well with calculated values for the diffusion of iodide ions through the perovskite layer. These results can be related to the origins of current-voltage hysteresis where a certain device state can be “locked-in” at low temperatures, at which ionic diffusion is restricted.
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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.