Top: Photograph of Ref CIGS (without AGS layer and thickness of CIGS = 300 nm) and CIGS modified with AGS layers. Bottom: Human eye sensitivity response curve and transmittance spectrum for Ref and modified CIGS on ITO-glass. Averaged values of transmittance for each film (Ref: CIGS [300 nm], AGS [0 nm]; O45: CIGS [230 nm], AGS [45 nm]; O90: CIGS [400 nm], AGS [90 nm]; O135: AGS [45 nm]; O90) in the spectral range of 400 to 800 nm are enclosed in the brackets in the legend. For example, O45 represents a combination of 230 nm CIGS and 45 nm AGS layers, and has average transmittance of 25.5%. Reproduced with permission.[79]Copyright 2016, Royal Society of Chemistry.
