Research Article
Non-Toxic Buffer Layers in Flexible Cu(In,Ga)Se2 Photovoltaic Cell Applications with Optimized Absorber Thickness
Table 2
Base parameters of the substitute buffer layers.
| Parameters | ZnO | ZnS | ZnS(O,OH) | Zn1−xSnxOy | ZnSe | In2S3 |
| τ (μm) | 0.03 | 0.04 | 0.05 | 0.05 | 0.04 | 0.05 | Eg (eV) | 3.30 | 3.68 | 3.80 | 3.74 | 2.71 | 2.90 | χe (eV) | 4.60 | 4.13 | 4.24 | 4.06 | 4.09 | 3.85 | Nd (cm−3) | 1 × 1017 | 5 × 1016 | 1 × 1017 | 1 × 1017 | 2 × 1017 | 1 × 1017 | μn (cm2 V−1 s−1) | 100 | 250 | 200 | 160 | 60 | 400 | μp (cm2 V−1 s−1) | 30 | 70 | 60 | 40 | 20 | 120 |
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