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A low temperature chemical deposition method has been developed to deposit iron/sulfur thin films onto soda lime glass substrates. The chemical bath deposition (CBD) consists of aqueous solution ferrous sulphate, disodium salt of ethylenediaminetetra-acetic acid (Na2EDTA), sodium thiosulphate and organic solutions of ethylenediamine and methanol. The experiments were performed at room temperature...
Reaction pathway investigations of the solvothermal preparation of nanocrystalline CuIn1−xGaxSe2 in triethylenetetramine reveal the early formation of a previously unreported Cu2−xSe(s) intermediate. Over 24 hours, this reacts with In and Se species to form CuInSe2(s). If Ga is present, the reaction proceeds over an additional 48 hours to form CuIn1−xGaxSe2. Adding ammonium halide salts reduces the...
It has recently been established that the ideal bandgap for terrestrial photovoltaics is 1.37 eV and the bandgap for CuInSe2 is only around 1.04 eV. Thus, a larger bandgap is needed. However, neither the substitution of Ga nor of Al has made a high efficiency solar cell absorber with a band gap of 1.37 eV possible. B, an even smaller atom, should require less atomic substitution than either Ga or...
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