Abstract
This paper presents the results of studying the photoelectric properties of CdSe/CdTe heterojunctions synthesized by the hot-wall epitaxy method. The CdSe/CdTe heterojunctions were manufactured by consecutive growth of CdSe and CdTe layers on a conductive ITO/glass substrate purchased from Solaronix Swiss. As ohmic contact for CdTe, Ni was deposited by thermal evaporation. The CdSe layer thickness (1–3 µm) was controlled according to the time of deposition of the layer. The temperature of the substrate and the source for CdTe growing were 400 ℃ and 520 ℃, respectively and reached the thickness 15 µm. The synthesis process for heterojunctions with CdTe layers includes the treatment of the entire structure in a CdCl2 solution, followed by annealing in air at a temperature of 450 ℃ for 30 min. Upon the deposition of CdTe layer, due to the diffusion of Se into the growing CdTe film, a transition layer of the CdSexTe1–x solid solution is formed at the interface, evidenced by the spectral dependence of the photocurrent. The investigation of the current-voltage characteristics at different intensity of illuminations shown that nonideality factor n has a value of 1.7–2.0, which indicate a generation-recombination mechanism of current in the CdSe/CdTe heterojunctions. The best photovoltaic parameters for CdSe/CdTe heterojunctions were achieved for structures with thicker CdSe layer and are as follows: JSC = 24.6 mA/cm2, UOC = 730 mV, FF = 0.5, η = 7.6%.
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References
Simaschevici, A., Gorceac, L., Serban, D.: Conversia fotoltaic a energiei solare. Cent. Ed. USM, Кишинeв (2002)
Munshi, A.H., et al.: Polycrystalline CdSeTe/CdTe absorber cells with 28 mA/cm2 short-circuit current. IEEE J. Photovolt 8(1), 310–314 (2018). https://doi.org/10.1109/JPHOTOV.2017.2775139
Swanson, D.E., Sites, J.R., Sampath, W.S.: Co-sublimation of CdSexTe1−x layers for CdTe solar cells. Sol. Energy Mater. Sol. Cells 159, 389–394 (2017). https://doi.org/10.1016/j.solmat.2016.09.025
Paudel, N.R., Yan, Y.: Enhancing the photo-currents of CdTe thin-film solar cells in both short and long wavelength regions. Appl. Phys. Lett. 105(18), 183510 (2014). https://doi.org/10.1063/1.4901532
Fiducia, T., et al.: Understanding the role of selenium in defect passivation for highly efficient selenium-alloyed cadmium telluride solar cells. Nat. Energy 4(6), 504–511 (2019). https://doi.org/10.1038/s41560-019-0389-z
Yang, X., et al.: Preparation and characterization of pulsed laser deposited CdS/CdSe bi-layer films for CdTe solar cell application. Mater. Sci. Semicond. Process. 48, 27–32 (2016). https://doi.org/10.1016/j.mssp.2016.03.009
Poplawsky, J.D., et al.: Structural and compositional dependence of the CdTe x Se 1 x alloy layer photoactivity in CdTe-based solar cells. Nat. Commun. 7, 12537 (2016). https://doi.org/10.1038/ncomms12537
Baines, T., et al.: Incorporation of CdSe layers into CdTe thin film solar cells. Sol. Energy Mater. Sol. Cells 180, 196–204 (2018). https://doi.org/10.1016/j.solmat.2018.03.010
Fang, X., et al.: Investigation of recombination mechanisms of CdTe solar cells with different buffer layers. Sol. Energy Mater. Sol. Cells 188, 93–98 (2018). https://doi.org/10.1016/j.solmat.2018.08.015
Grice, C.R., Archer, A., Basnet, S., Paudel, N.R., Yan, Y.: Characterization of CdS/CdSe window layers in CdTe thin film solar cells. In: 43rd Photovoltaic Specialists Conference (PVSC) (2016). https://doi.org/10.1109/PVSC.2016.7749859
Green, M., Dunlop, E., Hohl‐Ebinger, J., Yoshita, M., Kopidakis, N., Hao, X.: Solar cell efficiency tables (version 57). Progress in Photovoltaics: Research and Applications 1–13 (2020). https://doi.org/10.1002/pip.3371
Potlog, T.: The production of new types of CdTe photovoltaic devices with high efficiency. Pub. By Research Signpost, 87–121 (2014). ISBN: 978-81-308-0533-7
Potlog, T., Ghimpu, L., Gashin, P., Pudov, A., Sites, J.: Influence of annealing in different chlorides on the photovoltaic parameters of CdS/CdTe solar cells. Sol. Energy Mater. Sol. Cells 80(3), 327–334 (2003). https://doi.org/10.1016/j.solmat.2003.08.007
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The authors thank the Ministry of Education and Research of the Republic of Moldova for funding research grants 20.80009.5007.16.
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Gagara, L., Lungu, I., Ghimpu, L., Potlog, T. (2024). Synthesis Technology for CdSe/CdTe Heterojunctions and Characterization of Their Photoelectric Properties. In: Sontea, V., Tiginyanu, I., Railean, S. (eds) 6th International Conference on Nanotechnologies and Biomedical Engineering. ICNBME 2023. IFMBE Proceedings, vol 91. Springer, Cham. https://doi.org/10.1007/978-3-031-42775-6_23
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