Universidad Complutense de Madrid
E-Prints Complutense

Sub-bandgap spectral photo-response analysis of Ti supersaturated Si



Downloads per month over past year

Mártil de la Plaza, Ignacio and García Hemme, Eric and García Hernansanz, Rodrigo and González Díaz, Germán and Olea Ariza, Javier and Prado Millán, Álvaro del (2012) Sub-bandgap spectral photo-response analysis of Ti supersaturated Si. Applied physics Letters, 101 (19). ISSN 0003-6951


Official URL: http://dx.doi.org/10.1063/1.4766171



We have analyzed the increase of the sheet conductance (Delta G(square)) under spectral illumination in high dose Ti implanted Si samples subsequently processed by pulsed-laser melting. Samples with Ti concentration clearly above the insulator-metal transition limit show a remarkably high Delta G(square), even higher than that measured in a silicon reference sample. This increase in the Delta G(square) magnitude is contrary to the classic understanding of recombination centers action and supports the lifetime recovery predicted for concentrations of deep levels above the insulator-metal transition.

Item Type:Article
Additional Information:

© 2012 American Institute of Physics. Authors would like to acknowledge the CAI de Técnicas Físicas of the Universidad Complutense de Madrid for the ion implantations and metallic evaporations and the Nanotechnology and Surface Analysis Services of the Universidad de Vigo C.A.C.T.I. for ToF-SIMS measurements. This work was partially supported by the Project NUMANCIA II (Grant No. S-2009/ENE/1477) funded by the Comunidad de Madrid. Research by E. García-Hemme was also supported by a PICATA predoctoral fellowship of the Moncloa Campus of International Excellence (UCM-UPM). J. Olea and D. Pastor thanks Professor A. Martí and Professor A. Luque for useful discussions and guidance and acknowledge financial support from the MICINN within the program Juan de la Cierva (JCI-2011-10402 and JCI-2011-11471), under which this research was undertaken.

Uncontrolled Keywords:Solar-Cells, Semiconductors.
Subjects:Sciences > Physics > Electricity
Sciences > Physics > Electronics
ID Code:25807
Deposited On:12 Jun 2014 09:41
Last Modified:10 Dec 2018 14:58

Origin of downloads

Repository Staff Only: item control page