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A series of air-stable Mg-doped CuAlS 2 powder samples and ceramic pellets with large band gaps over 3.0eV have been prepared; their optical and electrical properties have been thoroughly investigated. Mg doping is effective in promoting the p-type conductivity of CuAlS 2 with nominal sacrifice of the optical band gap. Conductivity as high as 41.7Scm −1 is achieved at a doping...
A series of wide band gap semiconductors, CuAlS 2+x , with a chalcopyrite structure were synthesized in bulk form by spark plasma sintering. p-type conductions for all samples were confirmed by positive Seebeck and Hall coefficients. For excess S introduced into the system, the carrier concentration was highly enhanced, reaching 6.9×10 19 cm −3 for the 10% doped sample, which...
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