Free excitons at room temperature in cadmium telluride : A photoelectrochemical evidence |
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Authors: | P Lemasson |
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Institution: | Laboratoire d''Electrochimie Interfaciale du C.N.R.S. 1, Place Aristide Briand, 92190 Meudon, France |
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Abstract: | Photoelectrochemical experiments with n-type cadmium telluride electrodes are reported. When the semiconductor samples are sufficiently pure and exhibit a low free carrier concentration, the photocurrent vs. photon energy characteristic, at fixed potential, presents an intense and narrow peak which may be correlated to the excitonic absorption of CdTe. A forbidden gap energy value is deduced Eg = 1.475 eV at room temperature. |
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