First attempt to design CIGS/SWCNT tandem solar cells promises 38.91% efficiency

Indian researchers have proposed to build tandem solar cells based on a CIGS top cell and a bottom cell relying on a single-walled carbon nanotube (SWCNT) absorber. SWCNTs were previously used in solar research as an alternative to conventional metal grid contacts or hole transport layers (HTLs), as they combine optoelectronic properties, flexibility, chemical stability, and simple transfer protocols. Scientists led by the M. M. M. University of Technology, Gorakhpur in India have developed a tandem solar cell based on a copper, indium, gallium and diselenide (CIGS) top cell and a bottom cell ...

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