The Investigation of Effect on The Efficiency of CdTe-Based Solar Cell of MoO3 Buffer Layer

Abstract

In this study, the effect on the efficiency of CdS/CdTe solar cell with MoO₃ buffer layer was examined. Two sample was grown as Cam/FTO/SnO₂/CdS/CdTe/Au and Cam/FTO/SnO₂/CdS/CdTe/MoO₃/Au. MoO₃ layer was deposited as a buffer layer between CdTe and metal electrode in the back contact of CdTe solar cell. Solar cells were grown on glass/fluorine tin oxide substrate by Sputtering system. The morphological properties of CdS/CdTe solar cell structure with MoO₃ buffer layer have been evaluated by means of scanning electron microscope (SEM) and atomic force microscopy (AFM) measurements. In addition, the cell device was fabricated to obtain electrical output parameters of both the traditional CdTe-based cell and CdTe cell with MoO₃ buffer layer. The current‒voltage measurements were carried out at room temperature under both dark and air mass 1.5 global radiations. The energy conversion efficiency value has been obtained for traditional cell and the cell with MoO₃ buffer layer as 8.93% and 10.31% 1 Sun, respectively. It was observed that the integration of MoO₃ layer into CdTe-based solar cell increased cell efficiency by 15.45%.

Keywords

• CdTe-based thin film solar cell,MoO3 buffer layer,The energy conversion efficiency

MoO3 Tampon Tabakasının CdTe-Bazlı Güneş Hücresinin Verimliliği Üzerine Etkisinin İncelenmesi

Abstract

Bu çalışmada, MoO₃ tampon tabakasının CdS/CdTe güneş hücresinin verimliliği üzerine etkisi araştırıldı. Cam/FTO/SnO₂/CdS/CdTe/Au ve Cam/FTO/SnO₂/CdS/CdTe/MoO₃/Au olmak üzere iki adet numune üretildi. MoO₃ tabakası CdTe ve arka kontağın metal elektrotu arasına tampon tabaka olarak büyütüldü. Güneş hücreleri cam/flor katkılı kalay oksit alttaş üzerine Sıçratma (Sputtering) sistemi ile büyütüldü. MoO₃ tampon tabakası içeren CdS/CdTe güneş hücresinin morfolojik özellikleri atomik kuvvet mikroskobu (AFM) ve taramalı elektron mikroskobu (SEM) ölçümleri ile incelendi. Ayrıca, güneş hücre yapılarının elektriksel çıkış parametrelerini belirlemek için hem geleneksel CdTe-bazlı güneş hücresinin hem de MoO₃ tabakası içeren CdTe-bazlı güneş hücresinin fabrikasyonları yapıldı. Akım-voltaj ölçümleri oda sıcaklığında karanlık ve 1.5G ışık altında yapıldı. Enerji dönüşüm verimlilik değeri 1 Güneş’de geleneksel ve MoO₃ tabakası içeren güneş hücreleri için sırasıyla %8.93 ve %10.31 olarak elde edildi. MoO₃ tabakasının CdTe-bazlı güneş hücresine entegrasyonunun hücre verimliliğini %15.45 oranında arttığı gözlemlendi.

Keywords

• CdTe-bazlı ince film güneş hücresi,MoO3 tampon tabaka,Enerji dönüşüm verimliliği,Enerji dönüşüm verimliliği

References

1. A.N. Çelik, “Present Status of Photovoltaic Energy in Turkey and Cycle Techno-Economic Analysis of a Grid-Connected Photovoltaic–House,” IEEE Trans. Renewable & Sustaınable Energy Revıews, vol. 10, pp. 370-387, Aug. 2006.
2. Y. Özen, N. Akın, B. Kınacı, and S. Özçelik, “Performance evaluation of a GaInP/GaAs solar cell structure with the integration of AlGaAs tunnel junction,” IEEE Trans. Solar Energy Materials and Solar Cells, vol. 137, pp. 1-5, June 2015.
3. S. Mohammadnejad, M. Dehdast, and A. Bahrami, “Optimized DBR-based back reflector for silicon solar cells,” IEEE Trans. Transaction on Electron Optics, vol. 1, pp. 4-7, 2015.
4. N.R. Paudel, Y. Yan, “Fabrication and characterization of high-efficiency CdTe-based thin-film solar cells on commercial SnO2: F-coated soda-lime glass substrates,” IEEE Trans. Thin Solid Films, vol. 549, pp. 30-35, Dec. 2013.
5. R. Luo, B. Liu, X. Yang, Z. Bao, B. Li, J. Zhang, W. Li, L. Wu, and L. Feng, “The large-area CdTe thin film for CdS/CdTe solar cell prepared by physical vapor deposition in medium pressure,” IEEE Trans. Applied Surface Science, vol. 360, pp. 744-748, Jan. 2016.
6. N. Maticiuc, N. Spalatu, V. Mikli, and J. Hiie, “Impact of CdS annealing atmosphere on the performance of CdS–CdTe solar cell,” IEEE Trans. Applied Surface Science, vol. 350, pp. 14-18, Sep. 2015.
7. J. Britt and C. Ferekides, “Thin-film CdS/CdTe solar cell with 15.8% efficiency,” IEEE Trans. Applied Physics Letters, vol. 62, pp. 2851-2852, May. 1993.
8. X. Li, K. Shen, Q. Li, Y. Deng, P. Zhu, and D. Wang, “Roll-over behavior in current-voltage curve introduced by an energy barrier at the front contact in thin ?lm CdTe solar cell,” IEEE Trans. Solar Energy, vol. 165, pp. 27-34, May. 2018.

9. K. Shena, R. Yanga, D. Wanga, M. Jengc, S. Chaudharyd, K. Hoa, and D. Wang, “Stable CdTe solar cell with V2O5 as a back contact buffer layer,” IEEE Trans. Solar Energy Materials and Solar Cells, vol. 144, pp. 500-508, Jan. 2016.
10. N. R. Paudel, A.D. Compaan, and Y. Yan, “Sputtered CdS/CdTe solar cells with MoO3-x/Au back contacts, ” IEEE Trans. Solar Energy Materials and Solar Cells, vol. 113, pp. 26-30, June 2013.