Abstract
This study aims to improve the experimentally low performance of p-SnS/n-ZnMgO thin film solar cells (TFSCs). We report a modification in the p-SnS/n-ZnMgO cell structure to address the issues with the help of detailed numerical modeling and analysis via solar cell capacitance simulator software (SCAPS). Here, CdS is used as a thin buffer layer about a few nanometers in between the p-SnS absorber layer and n-ZnMgO window layer. However, in terms of band alignment, SnS/CdS interface attributed the minimum band-offset, resulting in the enhancement of open-circuit voltage (Voc) and overall performance. Furthermore, to evaluate the final cell structure, the solar cell simulation has been investigated by varying several parameters such as thickness and defect density of absorber layer; interface defect density and the operating temperature affect the electrical parameters of TFSCs. Initially, the band-alignment engineering has been investigated for variable doping concentration (x) of magnesium (Mg) in the Zn1-xMgxO window layer. However, Mg concentration (x) = 0.18 shows the better results (Voc = ~ 0.7 V, short-circuit current density (Jsc) = 38.54 mA/cm2, Fill Factor = 83%, and efficiency (ɳ) = ~ 23%) with minimum band-offset at the CdS/ZnMgO interface, and the hexagonal nanorod-like morphology of ZnMgO helps to improve open-circuit voltage. Finally, with the optimized parameters (tSnS = 2 μm, tCdS = 50 nm, and tZnMgO = 70 nm) with maximum SnS/CdS interface defect density (Nt = 1 × 1011 cm−2), the simulated optimal p-SnS/CdS/n-ZnMgO cell structure exhibited the highest efficiency ~ 20% comparably higher than the reported p-SnS/n-ZnMgO experimental value of 2.1%.
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References
Andrade-Arvizu JA, Courel-Piedrahita M, Vigil-Galán O (2015) SnS-based thin film solar cells: perspectives over the last 25 years. J Mater Sci: Mater Electron 26(7):4541–4556
Baig F et al (2018) Numerical analysis a guide to improve the efficiency of experimentally designed solar cell. Appl Phys A 124(7):471
Bittau F et al (2018) Analysis and optimisation of the glass/TCO/MZO stack for thin film CdTe solar cells. Sol Energy Mater Sol Cells 187:15–22
Burgelman M et al (2007) Numerical simulation of thin film solar cells: practical exercises with SCAPS
Chantana J et al (2019) Characterization of Cd-free Zn1–xMgxO:Al/Zn1–xMgxO/Cu(In,Ga)(S,Se)2 solar cells fabricated by an all dry process using ultraviolet light excited time-resolved photoluminescence
Cho JY et al (2019) Controlled thickness of a chemical-bath-deposited CdS buffer layer for a SnS thin film solar cell with more than 3% efficiency. J Alloy Compd 796:160–166
Cho JY et al (2020) Achieving over 4% efficiency for SnS/CdS thin-film solar cells by improving the heterojunction interface quality. J Mater Chem 8(39):20658–20665
Devika M et al (2008) Ohmic contacts to SnS films: selection and estimation of thermal stability. J Appl Phys 104(12):124503
Garain R, Basak A, Singh UP (2021) Study of thickness and temperature dependence on the performance of SnS based solar cell by SCAPS-1D. Mater Today 39:1833–1837
Gharibshahian I, Sharbati S, Orouji AA (2018) Potential efficiency improvement of Cu (In, Ga) Se2 thin-film solar cells by the window layer optimization. Thin Solid Films 655:95–104
Ghosh B et al (2011) Fabrication of CdS/SnS heterostructured device using successive ionic layer adsorption and reaction deposited SnS. Thin Solid Films 519(10):3368–3372
Haleem AMA, Ichimura M (2010) Experimental determination of band offsets at the SnS/CdS and SnS/InSxOy heterojunctions. J Appl Phys 107(3):034507
Hertwig R et al. (2020) ALD-ZnMgO and absorber surface modifications to substitute CdS buffer layers in co-evaporated CIGSe solar cells. EPJ Photovolt 11
He X et al (2018) Simulation of high-efficiency CdTe solar cells with Zn1-x Mg x O window layer by SCAPS software. Mater Res Express 5(6):065907
He X et al (2019) The Band Structures of Zn1−xMgxO(In) and the simulation of CdTe solar cells with a Zn1−xMgxO(In) window layer by SCAPS. Energies 12:291
Hodes G, Kamat PV (2015) Understanding the implication of carrier diffusion length in photovoltaic cells. J Phys Chem Lett 6(20):4090–4092
Klochko NP et al (2016) Development of a new thin film composition for SnS solar cell. Sol Energy 134:156–164
Maity S, Sahu PP (2019) Efficient Si-ZnO-ZnMgO heterojunction solar cell with alignment of grown hexagonal nanopillar. Thin Solid Films 674:107–111
Minbashi M et al (2018) Simulation of high efficiency SnS-based solar cells with SCAPS. Sol Energy 176:520–525
Mohammadnejad S, MollaaghaeiBahnamiri Z, EnayatiMaklavani S (2020) Enhancement of the performance of kesterite thin-film solar cells using dual absorber and ZnMgO buffer layers. Superlattice Microst 144:106587
Nguyen D (2020) Modelling and numerical analysis of ZnO/CuO/Cu2O heterojunction solar cell using SCAPS. Engineering Research Express 2
Niemegeers A, Burgelman M, Vos AD (1995) On the CdS/CuInSe2 conduction band discontinuity. Appl Phys Lett 67(6):843–845
Niemeyer M et al (2017) Minority carrier diffusion length, lifetime and mobility in p-type GaAs and GaInAs. J Appl Phys 122(11):115702
Omrani MK et al (2018) Improve the performance of CZTSSe solar cells by applying a SnS BSF layer. Solid-State Electron 141:50–57
Rajpal S and SR Kumar (2019) Effect of Mg concentration on the structural, morphological and optical properties of ternary ZnMgO nanocrystalline thin films. in Innovation in materials science and engineering. Singapore: Springer Singapore
Ramakrishna Reddy KT, Koteswara Reddy N, Miles RW (2006) Photovoltaic properties of SnS based solar cells. Sol Energy Mater Sol Cells 90(18):3041–3046
Reddy KTR et al (2011) Studies on the energy band discontinuities in SnS/ZnMgO Thin film heterojunction.
Rühle S (2016) Tabulated values of the Shockley–Queisser limit for single junction solar cells. solar energy
Singh P et al (2008) Temperature dependence of I-V characteristics and performance parameters of silicon solar cell. Sol Energy Mater Sol Cells 92(12):1611–1616
Sinsermsuksakul P et al (2014) Overcoming efficiency limitations of SnS-based solar cells
Tebyetekerwa M et al (2019) Quantifying quasi-Fermi level splitting and mapping its heterogeneity in atomically thin transition metal dichalcogenides. Adv Mater 31(25):1900522
Todorov TK et al (2017) Ultrathin high band gap solar cells with improved efficiencies from the world’s oldest photovoltaic material. Nat Commun 8(1):682
Xu J, Yang Y (2014) Study on the performances of SnS heterojunctions by numerical analysis. Energy Convers Manage 78:260–265
Acknowledgements
This manuscript is part of the special issue of selected papers from the 6th edition of the biennial International Conference on Nanoscience and Nanotechnology (ICONN-2021). The authors would like to express their gratitude to Dr. Fouran Singh, Inter-University Accelerator Centre (IUAC), New Delhi, for the prolific discussion. The author also acknowledges Dr. Marc Burgelman from the University of Gent for providing SCAPS simulation software.
Funding
This study received funding from the Inter-University Accelerator Centre (IUAC), New Delhi, through project number IUAC/XIII.3A/623O7 dated 11/08/2017.
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Kutwade, V.V., Gattu, K.P., Sonawane, M.E. et al. Contribution in PCE enhancement: numerical designing and optimization of SnS thin film solar cell. J Nanopart Res 23, 146 (2021). https://doi.org/10.1007/s11051-021-05259-5
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DOI: https://doi.org/10.1007/s11051-021-05259-5