Gas Sensors and Photo-Conversion Applications

  • Anouar HajjajiEmail author
  • Mosbah Amlouk
  • Mounir Gaidi
  • Brahim Bessais
  • My Ali El Khakani
Part of the SpringerBriefs in Applied Sciences and Technology book series (BRIEFSAPPLSCIENCES)


First, this chapter investigates the electrical behavior as well as stability and reproducibility of Cr doped TiO2 thin films against ethanol gas. Second the TiO2-Cr/SP/Si structures are studied using different techniques such as AFM, SEM, photoluminescence, lifetime and laser-induced current (LBIC). Finally, the optoelectronic and photosensibility properties of such structures based on Cr doped TiO2 revealed potential applications in photovoltaic solar cells.


Conductance Gas sensors Ethanol Sensitivity Microstructure Atomic force microscopy (AFM) Roughness parameter Light Beam Induced Current (LBIC) measurements Reflectivity Photoluminescence Photo-conversion 


  1. 1.
    Abdelghani A, Jaffrezic-Renault N (2001) SPR optical fibre sensor sensitized by fluorosiloxane polymers. Sens Actuators B 74:117Google Scholar
  2. 2.
    Labidi A, Bejaoui A, Ouali H, Akkari FC, Hajjaji A, Gaidi M, Kanzari M, Bessais B, Maaref M (2011) Dry air effects on the copper oxides sensitive layers formation for ethanol vapor detection. Appl Surf Sci 257:9941Google Scholar
  3. 3.
    Yamazoe N (1991) New approaches for improving semiconductor gas sensors. Sens Actuators B 5:7Google Scholar
  4. 4.
    Dolbec R, El Khakani MA (2005) Pulsed laser deposited platinum and gold nanoparticles as catalysts for enhancingthe CO sensitivity of nanostructured SnO2 sensors. Sens Lett 3:216Google Scholar
  5. 5.
    Dolbec R, El Khakani MA (2007) Sub-ppm sensitivity towards carbon monoxide by means of pulsed laser deposited SnO2: Pt based sensor. Appl Phys Lett 90:173114Google Scholar
  6. 6.
    Gaidi M, Labeau M, Chenevier B, Hazemann JL (1998) In-situ EXAFS analysis of the local environment of Pt particles incorporated in thin films of SnO2 semiconductorGoogle Scholar
  7. 7.
    Gaidi M, Chenevier B, Labeau M (2000) Electrical properties evolution under reducing gaseous mixtures (H2, H2S, CO) of SnO2 thin films doped with Pd/Pt aggregates and used as polluting gas sensors. Sens Actuators B 62:43Google Scholar
  8. 8.
    Hajjaji A, Labidi A, Gaidi M, Ben Rabha M, Smirani R, Bejaoui R, Bessais B, El Khakani MA (2011) Structural, optical and sensing properties of Cr-doped TiO2 thin films. J Sens Lett 9:1697Google Scholar
  9. 9.
    Ruiz AM et al (2003) Cr-doped TiO2 gas sensor for exhaust NO2 monitoring. Sens Actuators B 93:509Google Scholar
  10. 10.
    Davidson SM, Dimitriadis CA (1980) Advances in the electrical assessment of semiconductors using the scanning electron microscope. J Microsc 118:275Google Scholar
  11. 11.
    Ioannou DE, Gledhill RJ (1983) SEM-EBIC and traveling light spot diffusion length measurements—normally irradiated charge-collecting diode. IEEE Trans Electron Devices 30:577Google Scholar
  12. 12.
    Khedher N, Hajji M, Bouaicha M, Boujmil MF, Ezzaouia H, Bessais B (2002) Improvement of transport parameters in solar grade monocrystalline silicon by application of a sacrificial porous silicon layer. Solid State Commun 123:7Google Scholar
  13. 13.
    Hajjaji A, Ben Rabha M, Janene N, Dimassi W, Bessais B, El Khakani MA, Gaidi M (2012) Effect of dual treatment based on porous silicon and sputter-3 deposited TiO2 doped Cr film on the optoelectronic properties of monocrystalline Si. J Science JETC Marr 12:1Google Scholar
  14. 14.
    Sproul AB (1994) Dimensionless solution of the equation describing the effect of surface recombination on carrier decay in semiconductors. J Appl Phys 76:2851Google Scholar
  15. 15.
    Ben Rabha M, Bessaïs B (2010) Enhancement of photovoltaic properties of multicrystalline silicon solar cells by combination of buried metallic contacts and thin porous silicon. Sol Energy 84:486Google Scholar
  16. 16.
    Vasquez-A MA, Aguila Rodrigueza GA, Garcia-Salgado G, Romero-Paredesa G, Pena-Sierra R (2007) FTIR and photoluminescence studies of porous silicon layers oxidized in controlled water vapour conditions. Rev Mex Fis 53:431Google Scholar
  17. 17.
    Hajjaji A, Ben Rabha M, Janene N, Gaidi M, Bessais B, El Khakani MA (2012) Effect of dual treatment based on porous silicon and sputter-deposited TiO2 doped Cr film on the optoelectronic properties of monocrystalline Si. Appl Surf Sci 258:8046Google Scholar

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© The Author(s) 2015

Authors and Affiliations

  • Anouar Hajjaji
    • 1
    • 2
    Email author
  • Mosbah Amlouk
    • 3
  • Mounir Gaidi
    • 4
  • Brahim Bessais
    • 2
  • My Ali El Khakani
    • 1
  1. 1.Énergie, Matériaux et TélécommunicationsInstitut National de la Recherche Scientifique (INRS)VarennesCanada
  2. 2.Laboratoire de PhotovoltaïqueCentre de Recherches et des Technologies de l’EnergieHammam-LifTunisia
  3. 3.Unité de Physique des Dispositifs à Semi-Conducteurs, Faculté des Sciences de TunisTunis El-Manar UniversityTunisTunisia
  4. 4.Department of Applied PhysicsUniversity of SharjahSharjahUAE

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