Optical properties of ZnMgO films grown by spray pyrolysis and their application to UV photodetection

Lopez Ponce, Manuel; Hierro Cano, Adrián; Marín Borras, V.; Tabares Jimenez, Gema; Kurtz de Griñó, Alejandro; Muñoz Merino, Elias; Albert, Steven; Agouram, Said; Muñoz Sanjosé, Vicente y Ulloa Herrero, José María (2015). Optical properties of ZnMgO films grown by spray pyrolysis and their application to UV photodetection. "Semiconductor Science and Technology", v. 30 (n. 10); pp.. ISSN 0268-1242. https://doi.org/10.1088/0268-1242/30/10/105026.

Descripción

Título: Optical properties of ZnMgO films grown by spray pyrolysis and their application to UV photodetection
Autor/es:
  • Lopez Ponce, Manuel
  • Hierro Cano, Adrián
  • Marín Borras, V.
  • Tabares Jimenez, Gema
  • Kurtz de Griñó, Alejandro
  • Muñoz Merino, Elias
  • Albert, Steven
  • Agouram, Said
  • Muñoz Sanjosé, Vicente
  • Ulloa Herrero, José María
Tipo de Documento: Artículo
Título de Revista/Publicación: Semiconductor Science and Technology
Fecha: Septiembre 2015
Volumen: 30
Materias:
Palabras Clave Informales: ZnO, photodetectors, ZnMgO, spray pyrolysis, optical characterization, Stokes shift, MSM
Escuela: E.T.S.I. Telecomunicación (UPM)
Departamento: Ingeniería Electrónica
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

Texto completo

[img]
Vista Previa
PDF (Document Portable Format) - Se necesita un visor de ficheros PDF, como GSview, Xpdf o Adobe Acrobat Reader
Descargar (2MB) | Vista Previa

Resumen

This work presents a comprehensive optical characterization of Zn1−xMgxO thin films grown by spray pyrolysis (SP). Absorption measurements show the high potential of this technique to tune the bandgap from 3.30 to 4.11 eV by changing the Mg acetate content in the precursor solution, leading to a change of the Mg-content ranging from 0 up to 35%, as measured by transmission electron microscopy-energy dispersive x-ray spectroscopy. The optical emission of the films obtained by cathodoluminescence and photoluminescence spectroscopy shows a blue shift of the peak position from 3.26 to 3.89 eV with increasing Mg incorporation, with a clear excitonic contribution even at high Mg contents. The linewidth broadening of the absorption and emission spectra as well as the magnitude of the observed Stokes shift are found to significantly increase with the Mg content. This is shown to be related to both potential fluctuations induced by pure statistical alloy disorder and the presence of a tail of band states, the latter dominating for medium Mg contents. Finally, metal–semiconductor–metal photodiodes were fabricated showing a high sensitivity and a blue shift in the cut-off energy from 3.32 to 4.02 eV, i.e., down to 308 nm. The photodiodes present large UV/dark contrast ratios (102 − 107), indicating the viability of SP as a growth technique to fabricate low cost (Zn, Mg)O-based UV photodetectors reaching short wavelengths.

Proyectos asociados

TipoCódigoAcrónimoResponsableTítulo
Gobierno de EspañaTEC2011-28076-C02-01/02Sin especificarSin especificarSin especificar
Gobierno de EspañaTEC2014- 60173-C2-2Sin especificarSin especificarSin especificar
Sin especificarPrometeo/2011-035Sin especificarSin especificarSin especificar
Sin especificarISIC/2012/008Sin especificarSin especificarSin especificar

Más información

ID de Registro: 40784
Identificador DC: http://oa.upm.es/40784/
Identificador OAI: oai:oa.upm.es:40784
Identificador DOI: 10.1088/0268-1242/30/10/105026
URL Oficial: http://iopscience.iop.org/article/10.1088/0268-1242/30/10/105026
Depositado por: Memoria Investigacion
Depositado el: 14 Jun 2016 15:58
Ultima Modificación: 01 Oct 2016 22:30
  • Open Access
  • Open Access
  • Sherpa-Romeo
    Compruebe si la revista anglosajona en la que ha publicado un artículo permite también su publicación en abierto.
  • Dulcinea
    Compruebe si la revista española en la que ha publicado un artículo permite también su publicación en abierto.
  • Recolecta
  • e-ciencia
  • Observatorio I+D+i UPM
  • OpenCourseWare UPM