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Vol. 27, Special Issue, May 2014, pp. 142-146




Hybrid Solar Cells Based on Silicon Nanowire Arrays for Remote Chemical Sensing

1, * Jol DAVENAS, 1 Andrzej RYBAK, 2 David CORNU, 3 Georges BREMOND

1 Polymer Materials Institute, Lyon University - CNRS UMR 5223, 43 bd du 11 Novembre, 69622 Villeurbanne, France
2 European Membrane Institute, Montpellier University - ENSCM - CNRS UMR 5635, 1919 route de Mende, 34095 Montpellier, France
3 Lyon Nanotechnology Institute, INSA-CNRS UMR 5270, 7 avenue Jean Capelle, 69621 Villeurbanne, France
* Tel.: + 33-472431983

E-mail: Joel.Davenas@univ-lyon1.fr


Received: 31 December 2012 /Accepted: 10 August 2013 /Published: 26 May 2014

Digital Sensors and Sensor Sysstems


Abstract: Disordered arrays of silicon nanowires have been produced by the OAG technique. The UV-visible absorption spectrum of the SiNWs shows a main increase of the absorption extending in the near infrared and similar absorption than bulk crystalline silicon below 400 nm. T EMT simulation of the UV absorption of silicon nanowires predicts a main optical absorption for a nanowire orientation parallel to the electric field vector of the incident light, as expected for SiNW lying with a dominant orientation parallel to the substrate. The enhanced optical absorption tail extending above 400 nm has been attributed to the combination of band gap opening shown by the PL emission and high densities of silicon surface states at high surface/volume ratio. Hybrid solar cells have been fabricated through the dispersion of silicon nanowires in a poly(3-hexylthiophene) thin film leading to a 1.14 % conversion yield, which was increased to 3.04 % upon SiNW surface functionalization, opening new perspectives for self sufficient power supplies applicable to remote sensing.


Keywords: Silicon nanowires, P3HT, Photoluminescence, Quantum confinement, Hybrid solar cells


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