Article

Multi-Species Diffusion in CdTe

Inst. of Phys., Charles Univ., Prague, Czech Republic
IEEE Transactions on Nuclear Science (impact factor: 1.45). 09/2009; DOI:10.1109/TNS.2009.2022163 pp.1763 - 1767
Source: IEEE Xplore

ABSTRACT We studied theoretically chemical self-diffusion and the diffusion of extrinsic atoms in CdTe. We compiled a general model describing the multi-species diffusion of arbitrary amounts of elements in a form optimized for numerical calculations and applied it to a model system of CdTe doped with slow- or fast-diffusing elements. The diffusion of slowly diffusing atoms was analyzed and compared with experimental findings. We uncovered possible drawbacks in the experimental data that might affect the ensuing analysis by researchers, so generating incorrect conclusions. We suggest a method of purifying CdTe from fast-diffusing impurities based on a proper annealing/etching process.

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Keywords

arbitrary amounts
 
CdTe
 
CdTe doped
 
diffusing atoms
 
diffusion
 
ensuing analysis
 
experimental data
 
extrinsic atoms
 
fast-diffusing elements
 
fast-diffusing impurities
 
general model
 
incorrect conclusions
 
multi-species diffusion
 
numerical calculations
 
possible drawbacks
 
proper annealing/etching process
 
purifying CdTe
 
theoretically chemical self-diffusion