Band gap energy determination by photoacoustic spectroscopy under continuous light excitation

Detalhes bibliográficos
Autor(a) principal: Astrath, N. G. C.
Data de Publicação: 2006
Outros Autores: Persson, C., Silva, A. Ferreira da, Sato, F., Pedrochi, F., Medina, A. N., Bento, Antonio Carlos
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/6305
Resumo: In this work the authors used the photoacoustic spectroscopy under continuous light excitation to determine the optical band gap of semiconductors. The experiments were performed in lead iodide PbI2 and hexagonal silicon carbide 4H-SiC samples. The nonradiative relaxation processes are discussed in terms of the generated signal. A mechanism to describe the signal increase/decrease under the continuous excitation is presented. The results showed that the method was useful to locate the band gap directly from the optical absorption spectra
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spelling Astrath, N. G. C.Persson, C.Silva, A. Ferreira daSato, F.Pedrochi, F.Medina, A. N.Bento, Antonio CarlosAstrath, N. G. C.Persson, C.Silva, A. Ferreira daSato, F.Pedrochi, F.Medina, A. N.Bento, Antonio Carlos2012-07-04T13:14:58Z2012-07-04T13:14:58Z20060003-6951http://www.repositorio.ufba.br/ri/handle/ri/6305In this work the authors used the photoacoustic spectroscopy under continuous light excitation to determine the optical band gap of semiconductors. The experiments were performed in lead iodide PbI2 and hexagonal silicon carbide 4H-SiC samples. The nonradiative relaxation processes are discussed in terms of the generated signal. A mechanism to describe the signal increase/decrease under the continuous excitation is presented. The results showed that the method was useful to locate the band gap directly from the optical absorption spectraSubmitted by Santiago Fabio (fabio.ssantiago@hotmail.com) on 2012-07-04T13:14:58Z No. of bitstreams: 1 AAAAA888888888888888.pdf: 351125 bytes, checksum: 3e81fd240b55ebc858869ca3c9a13cef (MD5)Made available in DSpace on 2012-07-04T13:14:58Z (GMT). No. of bitstreams: 1 AAAAA888888888888888.pdf: 351125 bytes, checksum: 3e81fd240b55ebc858869ca3c9a13cef (MD5) Previous issue date: 2006APPLIED PHYSICS LETTERShttp://dx.doi.org/10.1063/1.2402239reponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBABand gap energy determination by photoacoustic spectroscopy under continuous light excitationAPPLIED PHYSICS LETTERSinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleenginfo:eu-repo/semantics/openAccessORIGINALAAAAA888888888888888.pdfAAAAA888888888888888.pdfapplication/pdf351125https://repositorio.ufba.br/bitstream/ri/6305/1/AAAAA888888888888888.pdf3e81fd240b55ebc858869ca3c9a13cefMD51LICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/6305/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52TEXTAAAAA888888888888888.pdf.txtAAAAA888888888888888.pdf.txtExtracted texttext/plain19667https://repositorio.ufba.br/bitstream/ri/6305/3/AAAAA888888888888888.pdf.txt8ea7908acad11b657331752f6e40ff7fMD53ri/63052022-07-05 14:03:45.672oai:repositorio.ufba.br:ri/6305VGVybW8gZGUgTGljZW7vv71hLCBu77+9byBleGNsdXNpdm8sIHBhcmEgbyBkZXDvv71zaXRvIG5vIHJlcG9zaXTvv71yaW8gSW5zdGl0dWNpb25hbCBkYSBVRkJBCgogICAgUGVsbyBwcm9jZXNzbyBkZSBzdWJtaXNz77+9byBkZSBkb2N1bWVudG9zLCBvIGF1dG9yIG91IHNldQpyZXByZXNlbnRhbnRlIGxlZ2FsLCBhbyBhY2VpdGFyIGVzc2UgdGVybW8gZGUgbGljZW7vv71hLCBjb25jZWRlIGFvClJlcG9zaXTvv71yaW8gSW5zdGl0dWNpb25hbCBkYSBVbml2ZXJzaWRhZGUgRmVkZXJhbCBkYSBCYWhpYSBvIGRpcmVpdG8KZGUgbWFudGVyIHVtYSBj77+9cGlhIGVtIHNldSByZXBvc2l077+9cmlvIGNvbSBhIGZpbmFsaWRhZGUsIHByaW1laXJhLCAKZGUgcHJlc2VydmHvv73vv71vLiBFc3NlcyB0ZXJtb3MsIG7vv71vIGV4Y2x1c2l2b3MsIG1hbnTvv71tIG9zIGRpcmVpdG9zIGRlIAphdXRvci9jb3B5cmlnaHQsIG1hcyBlbnRlbmRlIG8gZG9jdW1lbnRvIGNvbW8gcGFydGUgZG8gYWNlcnZvIGludGVsZWN0dWFsIGRlc3NhIFVuaXZlcnNpZGFkZS4gCgogICAgUGFyYSBvcyBkb2N1bWVudG9zIHB1YmxpY2Fkb3MgY29tIHJlcGFzc2UgZGUgZGlyZWl0b3MgZGUgZGlzdHJpYnVp77+977+9bywgZXNzZSB0ZXJtbyBkZSBsaWNlbu+/vWEgZW50ZW5kZSBxdWU6IAoKICAgIE1hbnRlbmRvIG9zICBkaXJlaXRvcyBhdXRvcmFpcywgcmVwYXNzYWRvcyBhIHRlcmNlaXJvcywgZW0gY2FzbyAKZGUgcHVibGljYe+/ve+/vWVzLCBvIHJlcG9zaXTvv71yaW8gcG9kZSByZXN0cmluZ2lyIG8gYWNlc3NvIGFvIHRleHRvIAppbnRlZ3JhbCwgbWFzIGxpYmVyYSBhcyBpbmZvcm1h77+977+9ZXMgc29icmUgbyBkb2N1bWVudG8gKE1ldGFkYWRvcyBkZXNjcml0aXZvcykuCgogRGVzdGEgZm9ybWEsIGF0ZW5kZW5kbyBhb3MgYW5zZWlvcyBkZXNzYSB1bml2ZXJzaWRhZGUgCmVtIG1hbnRlciBzdWEgcHJvZHXvv73vv71vIGNpZW5077+9ZmljYSBjb20gYXMgcmVzdHJp77+977+9ZXMgaW1wb3N0YXMgcGVsb3MgCmVkaXRvcmVzIGRlIHBlcmnvv71kaWNvcy4gCgogICAgUGFyYSBhcyBwdWJsaWNh77+977+9ZXMgZW0gaW5pY2lhdGl2YXMgcXVlIHNlZ3VlbSBhIHBvbO+/vXRpY2EgZGUgCkFjZXNzbyBBYmVydG8sIG9zIGRlcO+/vXNpdG9zIGNvbXB1bHPvv71yaW9zIG5lc3NlIHJlcG9zaXTvv71yaW8gbWFudO+/vW0gCm9zIGRpcmVpdG9zIGF1dG9yYWlzLCBtYXMgbWFudO+/vW0gbyBhY2Vzc28gaXJyZXN0cml0byBhbyBtZXRhZGFkb3MgCmUgdGV4dG8gY29tcGxldG8uIEFzc2ltLCBhIGFjZWl0Ye+/ve+/vW8gZGVzc2UgdGVybW8gbu+/vW8gbmVjZXNzaXRhIGRlIApjb25zZW50aW1lbnRvIHBvciBwYXJ0ZSBkZSBhdXRvcmVzL2RldGVudG9yZXMgZG9zIGRpcmVpdG9zLCBwb3IgCmVzdGFyZW0gZW0gaW5pY2lhdGl2YXMgZGUgYWNlc3NvIGFiZXJ0by4KCiAgICBFbSBhbWJvcyBvIGNhc28sIGVzc2UgdGVybW8gZGUgbGljZW7vv71hLCBwb2RlIHNlciBhY2VpdG8gcGVsbyAKYXV0b3IsIGRldGVudG9yZXMgZGUgZGlyZWl0b3MgZS9vdSB0ZXJjZWlyb3MgYW1wYXJhZG9zIHBlbGEgCnVuaXZlcnNpZGFkZS4gRGV2aWRvIGFvcyBkaWZlcmVudGVzIHByb2Nlc3NvcyBwZWxvIHF1YWwgYSBzdWJtaXNz77+9byAKcG9kZSBvY29ycmVyLCBvIHJlcG9zaXTvv71yaW8gcGVybWl0ZSBhIGFjZWl0Ye+/ve+/vW8gZGEgbGljZW7vv71hIHBvciAKdGVyY2Vpcm9zLCBzb21lbnRlIG5vcyBjYXNvcyBkZSBkb2N1bWVudG9zIHByb2R1emlkb3MgcG9yIGludGVncmFudGVzIApkYSBVRkJBIGUgc3VibWV0aWRvcyBwb3IgcGVzc29hcyBhbXBhcmFkYXMgcG9yIGVzdGEgaW5zdGl0dWnvv73vv71vLgo=Repositório InstitucionalPUBhttp://192.188.11.11:8080/oai/requestopendoar:19322022-07-05T17:03:45Repositório Institucional da UFBA - Universidade Federal da Bahia (UFBA)false
dc.title.pt_BR.fl_str_mv Band gap energy determination by photoacoustic spectroscopy under continuous light excitation
dc.title.alternative.pt_BR.fl_str_mv APPLIED PHYSICS LETTERS
title Band gap energy determination by photoacoustic spectroscopy under continuous light excitation
spellingShingle Band gap energy determination by photoacoustic spectroscopy under continuous light excitation
Astrath, N. G. C.
title_short Band gap energy determination by photoacoustic spectroscopy under continuous light excitation
title_full Band gap energy determination by photoacoustic spectroscopy under continuous light excitation
title_fullStr Band gap energy determination by photoacoustic spectroscopy under continuous light excitation
title_full_unstemmed Band gap energy determination by photoacoustic spectroscopy under continuous light excitation
title_sort Band gap energy determination by photoacoustic spectroscopy under continuous light excitation
author Astrath, N. G. C.
author_facet Astrath, N. G. C.
Persson, C.
Silva, A. Ferreira da
Sato, F.
Pedrochi, F.
Medina, A. N.
Bento, Antonio Carlos
author_role author
author2 Persson, C.
Silva, A. Ferreira da
Sato, F.
Pedrochi, F.
Medina, A. N.
Bento, Antonio Carlos
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Astrath, N. G. C.
Persson, C.
Silva, A. Ferreira da
Sato, F.
Pedrochi, F.
Medina, A. N.
Bento, Antonio Carlos
Astrath, N. G. C.
Persson, C.
Silva, A. Ferreira da
Sato, F.
Pedrochi, F.
Medina, A. N.
Bento, Antonio Carlos
description In this work the authors used the photoacoustic spectroscopy under continuous light excitation to determine the optical band gap of semiconductors. The experiments were performed in lead iodide PbI2 and hexagonal silicon carbide 4H-SiC samples. The nonradiative relaxation processes are discussed in terms of the generated signal. A mechanism to describe the signal increase/decrease under the continuous excitation is presented. The results showed that the method was useful to locate the band gap directly from the optical absorption spectra
publishDate 2006
dc.date.issued.fl_str_mv 2006
dc.date.accessioned.fl_str_mv 2012-07-04T13:14:58Z
dc.date.available.fl_str_mv 2012-07-04T13:14:58Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/6305
dc.identifier.issn.none.fl_str_mv 0003-6951
identifier_str_mv 0003-6951
url http://www.repositorio.ufba.br/ri/handle/ri/6305
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv APPLIED PHYSICS LETTERS
publisher.none.fl_str_mv APPLIED PHYSICS LETTERS
dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1063/1.2402239
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
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reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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