Pulsed and continuous wave solid phase laser annealing of electrodeposited CuInSe2 thin films

Ashish Bhatia; Helen Meadows; Alexandre Crossay; Phillip J. Dale; Michael A. Scarpulla

doi:10.1117/12.930147

12 October 2012 Pulsed and continuous wave solid phase laser annealing of electrodeposited CuInSe₂ thin films

Ashish Bhatia, Helen Meadows, Alexandre Crossay, Phillip J. Dale, Michael A. Scarpulla

Proceedings Volume 8473, Laser Material Processing for Solar Energy; 84730F (2012) https://doi.org/10.1117/12.930147
Event: SPIE Solar Energy + Technology, 2012, San Diego, California, United States

Abstract

Cu(In,Ga)Se₂ (CIGS) thin film photovoltaic absorber layers are primarily synthesized by vacuum based techniques at industrial scale. In this work, we investigate non-vacuum film synthesis by electrochemical deposition coupled with pulsed laser annealing (PLA) and or continuous wave laser annealing (CWLA) using 1064 nm laser. PLA results indicate that at high fluence (≥100 mJ/cm²) CuInSe₂ films melt and dewet on both Mo and Cu substrates. In the submelt PLA regime (≤70 mJ/cm²) no change in XRD results is recorded. However CWLA at 50 W/cm² for up to 45 s does not result in melting or dewetting of the film. XRD and Raman data indicate more than 80% reduction in full width at half maximum (FWHM) in their respective main peaks for annealing time of 15 s or more. No other secondary phases are observed in XRD or Raman spectrum. These results might help us in setting up the foundation for processing CIGS through an entirely non-vacuum process.

Citation Download Citation

Ashish Bhatia, Helen Meadows, Alexandre Crossay, Phillip J. Dale, and Michael A. Scarpulla "Pulsed and continuous wave solid phase laser annealing of electrodeposited CuInSe₂ thin films", Proc. SPIE 8473, Laser Material Processing for Solar Energy, 84730F (12 October 2012); https://doi.org/10.1117/12.930147

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