Synthesis and optical properties of II-O-VI highly mismatched alloys

Journal Article · Tue Jan 20 04:00:00 EST 2004 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1713021· OSTI ID:836378

Yu, K M ^[1]; Walukiewicz, W; Shan, W; Wu, J; Beeman, J W; Scarpulla, M A; Dubon, O D; Becla, P

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1. LBNL Library

We have synthesized ternary and quaternary diluted II-VI oxides using the combination of O ion implantation and pulsed laser melting. CdO{sub x}Te{sub 1-x} thin films with x up to 0.015, and the energy gap reduced by 150 meV were formed by O{sup +}-implantation in CdTe followed by pulsed laser melting. Quaternary Cd{sub 0.6}Mn{sub 0.4}O{sub x}Te{sub 1-x} and Zn{sub 0.88}Mn{sub 0.12}O{sub x}Te{sub 1-x} with mole fraction of incorporated O as high as 0.03 were also formed. The enhanced O incorporation in Mn-containing alloys is believed to be due to the formation of relatively strong Mn-O bonds. Optical transitions associated with the lower (E{sub -}) and upper (E{sub +}) conduction subbands resulting from the anticrossing interaction between the localized O states and the extended conduction states of the host are clearly observed in these quaternary diluted II-VI oxides. These alloys fulfill the criteria for a multiband semiconductor that has been proposed as a material for making high efficiency, single-junction solar cells.

• Research Organization: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
• Sponsoring Organization: USDOE Director. Office of Science. Office of Basic Energy Sciences. Materials Science and Engineering Division (US)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 836378
• Report Number(s): LBNL--54361
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 11 pt 1 Vol. 95
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
36 MATERIALS SCIENCE
ALLOYS
EFFICIENCY
ENERGY GAP
ION IMPLANTATION
LASERS
MELTING
OPTICAL PROPERTIES
OXIDES
SOLAR CELLS
SYNTHESIS
THIN FILMS