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Electrodeposition of ternary compounds for novel PV application and optimisation of electrodeposited CdMnTe thin-films

Scientific Reports 2020, 10, 21445; https://www.nature.com/articles/s41598-020-78066-y

Development of photovoltaic materials is critical to realising a low carbon economy.  Many current devices rely on manufacturing using vacuum processing techniques, requiring large chambers and extensive pumping.  Electrodeposition from a liquid electrolyte promises a far less capital intensive route, leading to cheaper PV panels as well as deposition on a range of shapes and materials.  In this work, CdMnTe films have been electro deposited and characterised by a range of techniques, including Sputtered Neutral Mass Spectrometry (SNMS) on the Hiden SIMS workstation.  SNMS is a high resolution sputter depth profiling method, similar to SIMS but with a linear response at high concentrations (0.1 to 100%), making it ideal for this type thin layer analysis.  The method is also fast, with complete layer profiles being obtained in around 7 minutes.

 Figure 5: Sputtered neutral mass spectra for the CdCl2-treated CdMnTe sample grown at 1430 mV with corresponding 5-points Fast Fourier Transform (FFT) smoothing.

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