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Germanium-based wide band gap kesterite semiconductor Cu2ZnGe(S,Se)4 (CZGeSSe) is considered a very promising absorber compound as top cell in tandem devices. Autonomy to tailor the from ~1.47 eV (Cu2ZnGeSe4-CZGeSe) ~2.2 (Cu2ZnGeS4-CZGeS), well non-toxic constituents makes this strong candidate for further scientific exploration. However, record efficiency of Cu2ZnGeSe4 solar cells still signif...
according to webster and wind (1972) and anderson et al (1987), “organizational buying is a complex process and involves many people from different functional areas, multiple goals and potentially conflicting decision criteria. moreover, the customers of today are also more knowledgeable and selective when making their purchasing decisions. since a key to organizational survival is the retentio...
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