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. 2021 Mar 3;8(9):2004313. doi: 10.1002/advs.202004313

Figure 6.

Figure 6

Thin film atomic force microscopy (AFM) topography images and SKPM potential maps. a) AFM topography, b) SKPM potential map, and c) plots of the topography and potential line scans of CZTSSe films without Li‐doping. d) AFM topography, e) potential map, and f) plots of the topography and potential line scans of CZTSSe films after Li‐doping. Reproduced with permission.[ 45 ] Copyright 2015, The Royal Society of Chemistry. g) Apparent carrier concentration derived from room‐temperature C–V measurements for (LixCu1− x)2ZnSn(S,Se)4 thin film solar cells. Reproduced with permission.[ 48 ] Copyright 2018, Wiley‐VCH.