Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
Ageing of organic solar cells is one of the last impediments left to overcome to reach industrial production. PEDOT:PSS layer in an inverted architecture, prepared from acid solutions, has been identified as a life time limitation factor. Therefore, many efforts have been made on replacing this polymer by oxide materials, which are expected to be more stable due to their inorganic nature. Organic solar cells incorporating transition metal oxides as hole transporting layer have shown good performances. Moreover, a special attention has been given to develop wet deposition methods compatible with industrial fabrication. Nanoparticle-based solution deposition methods do not require high temperature annealing compared to Sol-Gel methods which usually leave organic residue deteriorating the electrical properties. This work presents the synthesis of tungsten oxide nanoparticles and their wet process deposition in organic solar cells. Microwave assisted heating has led to a fast synthesis of WOx nanoparticles with a narrow size distribution. High stability in solution has been obtained, allowing the formation of homogeneous thin films. OPV devices have been realized and their performances have been assessed by J-V curves measurements. With P3HT:PCBM as an active layer, power conversion efficiency of 3,2% and 2,5% have been obtained in standard and inverted structures and aging experiments have also been carried out. The effect of annealing conditions of the whole stack in inverted structure has been studied. These performances have been compared to reference cells using PEDOT:PSS. Consequences of aging on electronic properties and on inorganic/organic interface are in progress.
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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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