A novel CISe/Ga-Se two–step stack approach to electrodeposit photovoltaic quality Cu-poor CuInGaSe2 thin films

Publication date: Available online 23 May 2019Source: Materials LettersAuthor(s): Ramkumar Chandran, Akhya Kumar Behera, Archana MallikAbstractIn the present work, we report on the electrodeposition of CuIn1-xGaxSe2 by a novel two-step deposition process. Initially, near stoichiometric CuInSe2 thin films of [Cu/In] ratio ∼ 1.15 was electrodeposited by single step technique using citric acid-sodium dodecyl sulfate (SDS) electrolyte. Further, the Ga-Se thin film was deposited potentiostatically in tartrate electrolyte to obtain a CISe/Ga-Se bilayer stack. The annealed CISe, CIGSe layers were subjected to XRD, FE-SEM and Raman studies to understand the structural, morphological, compositional and phase changes. The final composition of the annealed CIGSe thin film exhibited a CuIn0.66Ga0.34Se1.66 stoichiometry.
Source: Materials Letters - Category: Materials Science Source Type: research