Photoacoustic investigation of the carrier transport processes and the thermal properties in n-type GaAs

Jong Tae Lim, Joong-Gill Choi, Yong Hwan Bak, Seung Han Park, Ung Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The carrier-transport processes and the thermal properties of n-type GaAs were investigated by using photoacoustic spectroscopy. The frequency dependence of the photoacoustic signal showed that the photoacoustic effects in n-type GaAs were associated with instantaneous thermalization, nonradiative bulk recombination, and nonradiative surface recombination. In particular, it was found that in the high-frequency region the heat was primarily generated by the nonradiative bulk recombination and the nonradiative surface recombination processes. For the low-frequency region, however, the instantaneous thermalization process was the main origin of the heat. A thermal diffusivity of 0.51 cm 2/s, a diffusion coefficient of 5.2 cm 2/s, a surface recombination velocity of 355 cm/s, and a relaxation time of 5.8 μs were also obtained from the curve fitting of the photoacoustic phase spectrum.

Original languageEnglish
Pages (from-to)608-612
Number of pages5
JournalJournal of the Korean Physical Society
Volume31
Issue number4
Publication statusPublished - 1997 Dec 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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