| 摘要 |
A novel pseudobinary alloy of Pb1-xMxS, wherein 0<x<1 and M is selected from the group consisting of Sr and Ca, exists as a single phase at all compositions. With change in composition of Pb1-xSrxS, the energy gap at 300K has been found to change continuously from 0.4 eV for PbS to 4.6 eV for SrS. For compositions with x</=0.2, p-type and n-type thin films have been prepared by doping with Tl or Ag and with Bi, respectively. Similar single phase behavior and composition dependence of the energy gap is found with Pb1-xCaxS.
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