Temperature Effect on the Performance of of n-Type uc -Si Film Grown by Linear Facing Target Sputtering for Thin Film Silicon Photovoltaic Devices

Abstract

In this work, the effect of temperature on performance of (Al+Ag)/n+- c –Si/ p-Si/Al thin Film Grown by Linear Facing Target Sputtering thin Film solar cells devices has been investigated. c n+-Si type is used as donor whereas p-type used as an acceptor. The optimised device has an efficiency of ~23.5% at room temperature. Investigations on the optimized device show that temperature has significant effect on the photovoltaic performance. Short circuit current density (Jsc) and fill factor (FF) increase whereas open circuit voltage (Voc) increases with reduction in temperature. The increasing in Jsc has been attributed to the temperature dependent electronic properties of the active c n+-Si layers while the increment in the Voc has been attributed to the reduction in band bending and increment in built in voltage (Vbi) on lowering of temperature. In overall the efficiency first increases and then decreases with reduction in temperature.

Keywords

• thin film solar cells, electrical performance, Electronic properties, Fill factor, Short circuit current density, Open circuit voltage, series and shunt resistances

Kaynakça

1. J .Y. Kim, K .Lee, N. E. Coates, D. Moses, T.Q. Nguyen, M. Dante , A.J. Heeger, Efficient Tandem Polymer Solar Cells Fabricated by All-Solution Processing, Science, Vol.317(5835) 1126/science.1141711 225. DOI:
2. Y. Zhao, Z. Xie, C. Qin, Y. Qu, Y. Geng, L. Wang, Enhanced charge collection in polymer photovoltaic cells by using an ethanol-soluble conjugated poly- fluorene as cathode buffer layer, Sol. Energy Mater. Sol. Cells 93 (2009) 608. doi:10.1016/j.solmat.2008.12.007
3. N. Ghoneim, Interface state mapping in a Schottky barrier Spectrochim. Acta Pt. A 56 (2000) 1003-1010. semiconductor terrylene,
4. J.A. Hauch, P. Schilinsky, S. A. Choulis, R. Childers, M. Biele , C.J. Brabec, Solar Energy Mater Solar Cells, 92 (2008) 727.
5. F.C. Krebs, H. Spanggaard, Chem Mater, 17 (2005)
6. C. Lungenschmied, G. Dennler, H. Neugebauer, S. N. Sariciftci, M. Glatthaar, T. Meyer , A. Meyer, Solar Energy Mater Solar Cells, 91 (2007) 379.
7. T. Noda, H. Ogawa, Y. Shirota, Adv Mater, 11 (1999)
8. J.C. Renuarez, R.J. Garice-Sanchez, A. Ortz-Conde, Procedure for determining diode parameters at very low forward voltage, Solid State Electron. 43 (1999) 2129

9. K. Ocakoglu, F. Yakuphanoglu, J.R. Durrant, S. Icli, The effect of temperature on the charge transport and transient absorption properties of K27 sensitized DSSC, Sol. Energy Mater. Sol. Cells 92 (2008) 1047-1053. doi:10.1016/j.solmat.2008.03.006
10. F. Yakuphanoglu, Photovoltaic properties of the organic-inorganic photo- diode based on polymer and fullerene blend for optical sensors, Sens. Actuators A 141 (2008) 383-389.
11. Kumar P, Jain S C, Kumar V, Misra A, Chand S & Kamalasanan M N, Synth Met, 157 (2007) 905.
12. Kumar P, Misra A, Kamalasanan M N, Jain S C & Kumar V, Charge transport through conducting organic poly(2-methoxy-5- phenylenevinylene)”, J Phys D:Appl Phys, 40 (2007) doi:10.1088/0022-3727/40/2/034
13. Kumar P, Chand S, Dwivedi S & Kamalasanan M N, Appl Phys Lett, 90 (2007) 23501
14. Jain S C, Willander M & Kumar V, Conducting Organic Materials and Devices (Academic Press, San Diego), 2007.
15. Brabec C J, Cravino A, Meissner D, Sariciftci N S, Fromhertz T, Rispens M T, Sanchez L & Hummelen J C, Adv Funct Mater, 11 (2001) 374.
16. Douglas W. Sievers, Vishal Shrotriya, and Yang Yang, “Modeling optical effects and thickness dependent current in polymer bulk-heterojunction solar cells”, J Appl Phys, 95 (2004) 2816. doi:10.1063/1.2388854
17. Katz E A, Faiman D, Tuladhar S M, Kroon J M, Wienk M M, Fromherz T, Padinger F, Brabec C J & Sariciftci N S, J Appl Phys, 90, No.10 (2001) 5343. ISSN: 0021-8979
18. Peumanns & Forrest S R, “Very-high-efficiency double-heterostructure photovoltaic cells”, Appl Phys Lett, 79 (2001) 126. doi:10.1063/1.1384001 copper phthalocyanine/C60