Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
Hybrid organic-inorganic perovskite materials have risen up as leading components for light harvesting applications. However, to date many questions are still open concerning the operation of perovskite solar cells (PSCs). Here, we present a systematic analysis of the interplay of structural features, optoelectronic performance and ionic movement behavior for FA0.83MA0.17Pb(I0.83Br0.17)3 PSCs, which yield high power conversion efficiencies. We gradually increase the perovskite layer thickness and demonstrate that layers up to 500 nm are necessary to harvest as much light as the perovskite absorber allows. Importantly, such increase in layer thickness goes together with an increment of the perovskite crystal size. We prove that large perovskite crystals yield devices with high fill factor and no hysteresis. We associate this to fast current transients related to ionic displacement dynamics, as opposed to the slow transients in small crystal analogues. We conclude that perovskite grains of around 500 nm are necessary to consistently yield hysteresis-free devices displaying over 20% efficiency with high voltages and a champion device up to 20.8% efficient.
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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.
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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.
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