Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV16)
Publication date: 28th March 2016
When the first report of a perovskite solar cell was made by Miyasaka et al in 2009, the power conversion efficiency stood at 3%. However, when reports were almost simultaneously made by both Snaith and Park, of photovoltaic devices achieving 10.9% and 9.2% respectively, the field began its exponential growth. Since then, there has been burgeoning research into the field of perovskite photovoltaics, with perovskites being called a “wonder material” which promises to transform the industry. From its humble beginnings at a mere 3%, perovskite based photovoltaics are now leading the pack of emerging solar technologies, with certified efficiencies of 21%.
To date, all reports of perovskite films manufactured via solution methods require the use of high boiling point, polar, aprotic solvents. While the most frequently used solvent is dimethylformamide (DMF), other solvents include dimethyl sulfoxide (DMSO, γ-butyrolactone (GBL) and more recently, dimethylacetamide (DMA). While DMF is a very commonly used industrial solvent, it is very readily absorbed through the skin, easily carrying with it any other chemicals which may be dissolved in the solvent. DMF is not classified as carcinogenic however, it is toxic to the kidneys, liver and the central nervous system. While when used safely, the use of DMF is not a tremendous cause for concern, a cleaner, less harmful solvent would be far more desirable.
Here, we report on a new, non-toxic, low boiling point solvent system for the processing of organic, inorganic hybrid perovskite films. The use of a low boiling point solvent enables the rapid crystallisation of the perovskite material, while maintaining a large crystal sizes of up to 3 microns. This is in stark contrast to many other methods of rapid crystallisation in which the crystal sizes are between 400-800 nm. The use of this low, boiling point solvent results in high quality, dense, pin-hole free films with desirable optoelectronic properties. Through the optimisation of solution composition and deposition conditions, we fabricate planar heterojunction solar cells with power conversion efficiencies of up to 18 %, the first of their kind to be fabricated without the use of a high boiling point solvent.
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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.