Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV18)
Publication date: 21st February 2018
Organo-lead halide perovskites have seen much attention as photoabsorbing layers in solar cells due to their excellent semiconducting properties, low material cost and the wide range of deposition techniques that can be used to make films. Colloidal perovskite nanocrystals (NCs) are increasingly being studied in both perovskite solar cells and light emitting diodes (LEDs). They are strongly fluorescent and show high colour purity. In addition, the nanocrystals’ photophysical properties e.g. size, composition, surface chemistry, band gap and fluorescence, can easily be tuned by changing the preparation route and the precursors used.
Flow chemistry is a highly flexible synthesis route which shows improved mixing and temperature control compared to batch methods. Another advantage is the ability to do inline analysis, automation and rapid screening.1 The flow system also allows for continuous production which is important when scaling up to meet future demands of materials. We have used flow chemistry to synthesise MAPbBr3-xIx colloidal nanocrystals at room temperature with a high control of photoluminescence peak position and peak width (full width at half maximum < 40 nm).2
Though the synthesis is relatively simple, many factors can potentially impact the size and shape of the NCs, which in turn affects the photoluminescent properties. A Design of Experiments (DoE), a systematic and statistical approach to understanding the relationship between inputs and outputs, is now being employed to further explore the factors in the synthesis of the particles and improve the control. In this poster the key factors which influence the synthesis of perovskite nanocrystals will be discussed.
References
1 R. M. Maceiczyk, K. Dümbgen, I. Lignos, L. Protesescu, M. V. Kovalenko and A. J. deMello, Chem. Mater., 2017, acs.chemmater.7b02998.
2 X. Liang, K. Wu, W. Deng, R. Baker, D. Ferdani, F. Marken, L. Torrente-Murciano and P. J. Cameron, 2018, 1–21. https://chemrxiv.org/s/10ba98d62bbd0923f8ba
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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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