Photothermovoltaic effects induced by CO2 laser illumination of PbTe-metal junctions

Steponas P. Asmontas; Z. Dashevsky; M. P. Dariel; Jonas Gradauskas; A. Jarashneli; S. Shusterman; Algirdas Suziedelis; Gintaras Valusis

doi:10.1117/12.417602

8 March 2001 Photothermovoltaic effects induced by CO2 laser illumination of PbTe-metal junctions

Steponas P. Asmontas, Z. Dashevsky, M. P. Dariel, Jonas Gradauskas, A. Jarashneli, S. Shusterman, Algirdas Suziedelis, Gintaras Valusis

Author Affiliations +

Proceedings Volume 4318, Smart Optical Inorganic Structures and Devices; (2001) https://doi.org/10.1117/12.417602
Event: Advanced Optical Materials and Devices, 2000, Vilnius, United States

Abstract

Our study is concerned with the photo-thermovoltaic effects caused by the absorption of CO₂ laser light in narrow gap A^IVB^VI semiconductors. We report on results of experimental study of photoresponse induced in n-type and p- type lead telluride with Ni contacts. We show that in the case of ohmic contacts (n-PbTe-Ni and p-PbTe-Ni at 300K) the detected signal originated from thermoemf due to created crystal lattice temperature gradient. In the case of p- PbTe-Ni at 80K we have Schottky contacts and the photoresponse consists at least of two components: fast and great in value photoemf- due to carrier generation resulting from two-photon absorption, and slow as well as of lower magnitude thermoemf.

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Steponas P. Asmontas, Z. Dashevsky, M. P. Dariel, Jonas Gradauskas, A. Jarashneli, S. Shusterman, Algirdas Suziedelis, and Gintaras Valusis "Photothermovoltaic effects induced by CO2 laser illumination of PbTe-metal junctions", Proc. SPIE 4318, Smart Optical Inorganic Structures and Devices, (8 March 2001); https://doi.org/10.1117/12.417602

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