Abstract
The CdTe solar cells have extensively researched for ultra-thin CdTe absorber and ohmic-contact at the back but still there is room to increase performance by improving front contact. The main focus of this study is to develop CdTe solar cells using different front contact and to observe the influence of different layers on the performance of CdTe solar cells. The simulation has been done with well-known device simulation software called Analysis of Microelectronic and Photonic Structures (AMPS-1D). To reduce the optical loss and increase electrical conductivity Indium Tin Oxide (ITO) has been chosen as TCO layer. Again, ZnO is explored as a high resistivity transparent (HRT) buffer layer to solve weak diode and pinhole problems. After modification in front contact with HRT and high mobility TCO layer, we obtained a convincing result of 23.13% efficiency. A single Anti Reflection Coating layer has been inserted for further improvement. Finally, a MgF 2 /ITO/ZnO/CdS/CdTe/As 2 Te 3 solar cells with 700 nm CdTe absorber thickness has been proposed which has Jsc = 25.716 mA/cm2, Voc = 1082 mV, FF = 87.8% and 24.43% efficiency.
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