Abstract
In this work, the results about the properties of CdTe:Bi thin films grown by the Closed Space Vapor Transport (CSVT) method are presented. Two procedures were developed for the CdTe:Bi films deposition: (a) using powders with different Bi concentrations at a constant pressure in the CSVT chamber and (b) varying the total final Ar pressure in the CSVT chamber. The CdTe powders used in our experimental conditions were obtained by using CdTe:Bi crystals grown by the vertical Bridgman method, varying the nominal Bi-dopant concentration in the 1.0 × 1017 to 4 × 1019 at/cm3 range. Finally, the possible influence of both parameters on the existence of an intermediate band in CdTe:Bi thin films and CdS/CdTe solar cell characteristics is analyzed.
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D.L. Batzner, A. Romeo, M. Terheggen, M. Dobeli, Stability aspects in CdTe/CdS solar cells. Thin Solid Films 451–452, 536–543 (2004)
N. Romeo, A. Bosio, R. Tedeschi, V. Canevari, Growth of polycrystalline CdS and CdTe thin layers for high efficiency thin film solar cells. Mat. Chem. Phys. 66, 201–206 (2000)
J. Aguilar-Hernandez, G. Contreras-Puente, J. Vidal-Larramendi, O. Vigil-Galan, Influence of the growth conditions on the photoluminescence spectrum of CdTe polycrystalline films deposited by the close space vapor transport technique. Thin Solid Films 426, 132–134 (2003)
N. Lopez, L.A. Reichertz, K.M. Yu, K. Campman, W. Walukiewicz, Engineering the electronic band structure for multiband solar cells. Phys. Rev. Lett. 106, 028701 (2011)
W.M. Wang, A.S. Lin, J.D. Phillips, Intermediate-band photovoltaic solar cell based on ZnTe:O. Appl. Phys. Lett. 95, 011103 (2009)
P. Wahnon, J.C. Conesa, P. Palacios, R. Lucena, I. Aguilera, Y. Seminovskia, F. Fresno, V-doped SnS2: a new intermediate band material for a better use of the solar spectrum. Phys. Chem. Chem. Phys. 13, 20401–20407 (2011)
A. Martí, D.F. Marrón, A. Luque, Evaluation of the efficiency potential of intermediate band solar cells based on thin-film chalcopyrite materials. J. Appl. Phys. 103, 073706 (2008)
A. Luque, A. Martí, Increasing the efficiency of ideal solar cells by photon induced transitions at intermediate levels. Phys. Rev. Lett. 78, 5014–5017 (1997)
E. Saucedo, O. Martínez, C.M. Ruiz, O. Vigil-Galán, I. Benito, L. Fornaro et al., Growth and properties of CdTe:Bi-doped crystals. J. Cryst. Growth 291, 416–423 (2006)
E. Saucedo, C.M. Ruiz, V. Bermúdez, E. Dieguez, E. Gombia, A. Zappettini, A. Baraldi, N.V. Sochinskii, Photoluminescence and photoconductivity in CdTe crystals doped with Bi. J. Appl. Phys. 100, 104901 (2006)
C.M. Ruiz, O. Vigil, E. Saucedo, G. Contreras-Puenteand, V. Bermúdez, Bi doped CdTe: increasing potentialities of CdTe based solar cells. J. Phys.: Condens. Matter 18, 7163 (2006)
Y. Seminóvski, P. Palaciosa, P. Wahnóna, in First principles study of Bi doped CdTe thin film solar cells: electronic and optical properties, Imagine Nano, Bilbao Exhibition Center, Bilbao, Spain, 11–14 April 2011
O. Vigil-Galán, E. Sánchez-Meza, J. Sastré-Hernández, F. Cruz-Gandarilla, E. Marín, G. Contreras-Puente, E. Saucedo, C.M. Ruiz, M. Tufiño-Velázquez, A. Calderón, Study of the physical properties of Bi doped CdTe thin films deposited by close space vapour transport. Thin Solid Films 516, 3818–3823 (2008)
O. Vigil-Galana, A. Arias-Carbajal, R. Mendoza-Perez, G. Santana, J. Sastre-Hernández, G. Contreras-Puente, A. Morales-Acevedo, M. Tufino-Velázquez, Spectral response of CdS/CdTe solar cells obtained with different S/Cd ratios for the CdS chemical bath. Solar Energy Mater. Solar Cells 90, 2221–2227 (2006)
J.J. Loferski, Theoretical considerations governing the choice of the optimum semiconductor for photovoltaic solar energy conversion. J. Appl. Phys. 27, 777 (1956)
G.B. Harris, Philos. Mag. 43, 113 (1952)
Acknowledgments
This work was carried out with support from CeMIE-Sol-207450/P25 and CeMIE-Sol-207450/P26. O. Vigil-Galán, and F. Cruz-Gandarilla acknowledge support from COFAA and EDI of IPN. M. Courel thanks BEIFI and CONACYT fellowship support.
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Vigil-Galán, O., Courel, M., Cruz-Gandarilla, F. et al. CdTe:Bi films deposited by closed space vapor transport under variable pressure and doping levels: evidences of the possible formation of an intermediate band. J Mater Sci: Mater Electron 27, 6088–6095 (2016). https://doi.org/10.1007/s10854-016-4534-1
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DOI: https://doi.org/10.1007/s10854-016-4534-1