Impact of Back Surface Field (BSF) Layers in Cadmium Telluride (CdTe) Solar Cells from Numerical Calculation
C. Doroody1, K. S. Rahman2, H. N. Rosly3, M. N. Harif4, Y. Yusoff5, S. Fazlili6, M. A. Matin7, S. K. Tiong8, N. Amin9
1C. Doroody, College of Engineering, Universiti Tenaga Nasional (@The National Energy University), Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, Malaysia.
2H. N. Rosly, College of Engineering, Universiti Tenaga Nasional (@The National Energy University), Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, Malaysia.
3M. N. Harif, College of Engineering, Universiti Tenaga Nasional (@The National Energy University), Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, Malaysia.
4K. S. Rahman, Institute of Sustainable Energy, Universiti Tenaga Nasional (@the National Energy University), Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, Malaysia.
5Y. Yusoff, Institute of Sustainable Energy, Universiti Tenaga Nasional (@the National Energy University), Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, Malaysia.
6S. Fazlili, Institute of Sustainable Energy, Universiti Tenaga Nasional (@the National Energy University), Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, Malaysia.
7S. K. Tiong, Institute of Sustainable Energy, Universiti Tenaga Nasional (@the National Energy University), Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, Malaysia.
8N. Amin, Institute of Sustainable Energy, Universiti Tenaga Nasional (@the National Energy University), Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, Malaysia.
9M. A. Matin, Renewable Energy Laboratory, Chittagong University of Engineering and Technology, Chittagong 4349, Bangladesh.

Manuscript received on November 12, 2019. | Revised Manuscript received on November 25, 2019. | Manuscript published on 30 November, 2019. | PP: 6218-6222 | Volume-8 Issue-4, November 2019. | Retrieval Number: D5143118419/2019©BEIESP | DOI: 10.35940/ijrte.D5143.118419

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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: In this study, numerical simulation has been executed using Solar Cell Capacitance Simulator (SCAPS-1D) to study the prospect of favourable efficiency and stable CdS/CdTe cell in various cell configurations. A basic structure of CdS/CdTe cell is studied with 4 μm CdTe as absorber layer, 100 nm tin oxide (SnO2) as front contact and 25 nm cadmium sulfides (CdS) as buffer layer. Four back surface fields (BSF) layers namely ZnTe, ZnTe: Cu, Cu2Te and MoTe2 are investigated to reduce the minority carrier recombination at back contact. The cell structure of glass/SnO2/CdS/CdTe/MoTe2 has shown a nearly ohmic contact with CdTe with the highest efficiency of 17.02% (Voc=0.91 V, Jsc=24.79 mA/cm2, FF=75.41). Simulation results have verified that MoTe2 as BSF layer is appropriate for an efficient CdS/CdTe cell. Moreover, it is found that a few nanometres (about 40 nm) of BSF layer are enough to achieve high efficiency. For MoTe2 layer, more than 17% efficiency has been achieved compared to other BSF layers.
Keywords: Back Surface Field Layers, Cadmium Telluride and Solar Cell
Scope of the Article: Numerical Modelling of Structures.