Authors:
K Sarkar,K K Ghosh,N K Mandal,DOI NO:
https://doi.org/10.26782/jmcms.2018.04.00009Keywords:
Thin film solar,CdS/CdTe,TCO,Window layer,Schottky Barrier,Back Surface Field (BSF),Abstract
We have commenced an in-depth study through modeling and simulation to investigate the performance of a CdTe solar cell at different Schottky barrier heights for different combinations thicknesses of BSF as well as window layer and front contact oxide layer (TCO) .The inter relation between BSF layer and back contact schottky barrier height has been focused. Effect of the BSF layer regarding the tunneling of charges has been investigated. In the present paper, we achieved in our study the highest ƞ of 18.39%, Voc of 0.591 volt, Isc of 0.411 amp for 0.1 µm absorber and 1nm BSF layer thickness in presence of higher schottky barrier (0.6eV) with higher doping concentration of absorber layer. Thinning of the layers have always been better in terms of performance and cost. But it brings pinhole formation problems what we excluded here in our present work. Keywords : Thin film solar, CdS/CdTe, TCO, Window layer, Schottky Barrier, Back Surface Field (BSF).Refference:
I Amin N, Matin MA, Aliyu MM, Alghoul MA, Karim M, and Sopian K (2010) Prospects of Back Surface Field Effect in Ultra-Thin High-Efficiency CdS/CdTe Solar Cells from Numerical Modeling, Hindawi Publishing Corporation, International Journal of Photoenergy, Article ID 578580, 8 pages, doi:10.1155/2010/578580
II Batzner DL, Romeo A, Zogg H, Tiwari AN, Wendt R (2000) Development of Efficient and Stable Back Contacts on Cdte/Cds Solar Cells, Research gate, DOI: 10.1016/S0040-6090(01)00792-1
III Burgelman M, Nollet P, Degrave S (1999) Electronic behaviour of thin-film CdTe solar cells, Applied Physics A-Materials Science& Processing, A 69, 149–153 / Digital Object Identifier (DOI) 10.1007/s003399900063
IV ChanderSubhash, Dhaka M.S. (2017) Time evolution to CdCl2 treatment on Cd-based solar cell devices fabricated by vapor evaporation, Solar Energy, Volume 150, Pages 577-583, https://doi.org/10.1016/j.solener.2017.05.013
V ChanderSubhash, Dhaka M.S. (2015) Physical properties of vacuum evaporated CdTe thin films with post-deposition, Physica E: Low-dimensional Systems and Nanostructures, Volume 73, Pages 35-39, http://dx.doi.org/10.1016/j.physe.2015.05.008
VI ChanderSubhash, Dhaka M.S. (2015) Optimization of physical properties of vacuum evaporated CdTe thin films with the application of the thermal treatment for solar cells,MaterialsScienceinSemiconductorProcessing40 (2015)708–712,http://dx.doi.org/10.1016/j.mssp.2015.07.063
VII Demtsu SH, Sites JR(2006) Effect of back-contact barrier on thin-film CdTe solar cells,Science direct- Thin Solid Films 510: 320–324
VIII Fang Z, Wang XC, Wu HC, and Zhao CZ (2011) Achievements and Challenges of CdS/CdTe Solar Cells, Hindawi Publishing Corporation-International Journal of Photoenergy, Volume 2011, Article ID 297350, 8 pages, doi:10.1155/2011/297350.
IX Fardi H and Buny F(2013) Characterization and Modeling of CdS/CdTe Heterojunction Thin-Film Solar Cell for High Efficiency Performance, Hindawi Publishing Corporation, International Journal of Photoenergy, Volume 2013, Article ID 576952, 6 pages, http://dx.doi.org/10.1155/2013/576952
X Gessert TA, Dhere RG, Duenow JN, Kuciauskas D, Kanevce A, and Bergeson JD (2011) Comparison Of Minority Carrier Lifetime Measurements In Superstrate and Substrate CdTe PV Devices, 37th IEEE Photovoltaic Specialists Conference (PVSC 37), NREL/CP-5200-50747
XI Hadrich M, Heisler C, Reislohner C, Kraft C, Metzner H (2011) Back contact formation in thin cadmium telluride solar cells ,Thin Solid Films 519: 7156–7159
XII Hossain MS, Amin N, Razykov T (2011) Prospects of Back Contacts with Back Surface Fields in High Efficiency Znxcd1-Xs /Cdte Solar Cells from Numerical Modeling, Chalcogenide Letters, Vol. 8, No. 3, p. 187 – 198 .
XIII Huldt L (1968) Direct Electron-Hole Recombination in Cadmium Sulfide, Helvetica PhysicaActa, Vol. 41, PP. 942-945, http://doi.org/10.5169/seals-113951.
XIV Jones EW, Barrioz V, Irvine SJC, Lamb D (2009) Towards ultra-thin CdTe solar cells using MOCVD, Science Direct- Thin Solid Films 517: 2226–2230, doi:10.1016/j.tsf.2008.10.093
XV Islam MA, Sulaiman Y, Amin N (2011) A Comparative Study of BSF Layers For Ultra-Thin Cds:O/Cdte Solar Cells, Chalcogenide Letters, Vol. 8, No. 2, p. 65 – 75.
XVI Kim K, Kim IH,Yoon KY, Lee J and Jang JH (2015) a-Fe2O3 on patterned fluorine doped tin oxide for efficient photoelectrochemical water splitting, Journal of Materials Chemistry A, 3,7706, DOI: 10.1039/c5ta00027k
XVII Matin MA, Aliyu MM, Quadery AH, Amin N (2010) Prospects of novel front and back contacts for high efficiency cadmium telluride thin film solar cells from numerical analysis, Solar Energy Materials & Solar Cells 94: 1496–1500
XVIII MuhibbullahM, Choudhury M GolamMowla, Mominuzzaman Sharif M (2012), An equation of the width of the depletion layer for a step heterojunction, Trans. Mat. Res. Soc. Japan 37[3] 405-408.
XIX Niasse, O.A., Tankari, M.A., Dia, F., Mbengue, N., Diao, A., Niane, M., Diagne, M., Ba, B. And Levebvre, G. (2016) Optimization of Electrics Parameters CdS/CdTe Thin Film Solar Cell Using Dielectric Model. World Journal of Condensed Matter Physics, 6, 75-86, http://dx.doi.org/10.4236/wjcmp.2016.62011
XX Niemegeers A and Burgelman M (1997) Effects of the Au/CdTe back contact on IV and CV characteristics of Au/CdTe/CdS/TCO solar cells, Journal of Applied Physics 81, 2881; doi: 10.1063/1.363946.
XXI Niemegeers A and Burgelman M (1996) Numerical Modelling Of Ac-Characteristics Of CdTe And CIS Solar Cells, 25nd IEEE Photovoltaic Specialists Conference, Washington, pp. 901-904
XXII Noor N, Parkin I P (2013) Halide doping effects on transparent conducting oxides formed by aerosol assisted chemical vapour deposition, Thin Solid Films 532, 26–30, http://dx.doi.org/10.1016/j.tsf.2012.10.110
XXIII Streetman Ben G., (1982) Solid State Electronic Device, Prentice-hall, Eastern Economy Edition, 2nd Edition, Chapter 5,Junctions,pp. 140-145,
XXIV Tiwari AN, Khrypunov G, Kurdzesau F, Batzner DL, Romeo A , Zogg H (2004). CdTe Solar Cell in a Novel Configuration, Progress in Photovoltaics: Research and Applications 12:33–38 (DOI: 10.1002/pip.525)
XXV Zhang B, Tian Y, Zhang J, CaiW(2010) The FTIR studies on the structural and electrical properties of SnO2:F films as a function of hydrofluoric acid concentration, Optoelectronics And Advanced Materials – Rapid Communications Vol. 4, No. 8, p. 1158 – 1162.
Author(s): K Sarkar,K K Ghosh, N K Mandal View Download