Photocurrent study of Fe-doped semi-insulating InP

✍ Scribed by M. Avella; J. Jiménez; A. Alvarez; M.A. González; L.F. Sanz

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 337 KB
• Volume: 28
• Category: Article
• ISSN: 0921-5107
• DOI: 10.1016/0921-5107(94)90027-2

✦ Synopsis

Fe distribution is studied in semi-insulating liquid-encapsulated Czochralski (LEC) Fe-doped InP, by means of spatially resolved photocurrent measurements. Local fluctuations of the extrinsic photocurrent are related to Fe distribution inhomogeneities, which are related to the dislocation atmospheres. The electronic transitions involved are modelled by a set of rate equations. The theoretical model gives an excellent fit of the experimental data, thus allowing us to obtain an estimation of the local Fe 3 ÷ concentration, which can fluctuate by up to 15% of the average concentration.