Nanosecond laser scribing of CIGS thin film solar cell based on ITO bottom contact
- Nanosecond laser scribing of CIGS thin film solar cell based on ITO bottom contact
- 정증현; 최재명; Seungkuk Kuk; Zhen Wang; Shi Fu; Yi Yin Yu; David J. Hwang
- CIGS; TCO back contact; monolithic integrated module; laser scribing
- Issue Date
- Applied physics letters
- VOL 112, NO 13-134102-5
- Cu(In,Ga)Se2 (CIGS) thin films, a promising photovoltaic architecture, have mainly relied on
Molybdenum for the bottom contact. However, the opaque nature of Molybdenum (Mo) poses
limitations in module level fabrication by laser scribing as a preferred method for interconnect. We examined the P1, P2, and P3 laser scribing processes on CIGS photovoltaic architecture on the indium tin oxide (ITO) bottom contact with a cost-effective nanosecond pulsed laser of 532 nm wavelength. Laser illuminated from the substrate side, enabled by the transparent bottom contact, facilitated selective laser energy deposition onto relevant interfaces towards high-quality scribing. Parametric tuning procedures are described in conjunction with experimental and numerical investigation of relevant mechanisms, and preliminary mini-module fabrication results are also presented.
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