CdTe thin film solar cells by pulsed electron deposition

We report a fabrication process developed at the Laboratory for Photovoltaics and Solid State Physics of Verona University (Prof Alessandro Romeo) for a complete CdTe thin-film solar cells where the CdTe absorber layer is made by pulsed electron deposition (PED) method with Noivion equipment. PED is a high-density pulsed energy thin film deposition system that allows high-energy growth at lower substrate temperatures. In order to analyze and optimize the fabrication process the researchers started from their baseline where CdTe is deposited in a vacuum chamber and then annealed after CdCl2 deposition (by dipping in methanol solution). Cells with CdTe absorbers made by PED and by vacuum evaporation have been compared in terms of electrical and physical properties. Efficiency for thin CdTe devices demonstrates that PED allows fabricating a very compact and dense film.

Related publications:

Salavei Andrei et al. “CdTe thin film solar cells by pulsed electron deposition” proceeding of 43rd IEEE Photovoltaic Specialists Conference, PVSC Portland; United States, 5 – 10 June 2016