Abstract
We have studied the room-temperature photophysics of variously doped CdS and Cd(Hg)S powders by the microwave photoconductivity technique. Accordingly, we infer that both Cu and Ag are effective hole traps, the rate of hole trapping being limiting for the first order decay of photoconductivity. In CdS:Cu, states 0.14 and 0.33 eV below the conduction band are important to the photophysics of the powders; these have been demonstrated to be associated with sulfide vacancies. The presence of a (neutral) donor state associated with mercury appears to be a useful working hypothesis in the interpretation of observations made on Cd(Hg)S powders. Combination of donor (Ga or Eu) and acceptor (Cu or Ag) dopants leads to formation of spectroscopically detectable charge-transfer complexes in the CdS lattice; the conduction band can be populated directly from the acceptor state of the complex on irradiation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
