• P-ISSN 0974-6846 E-ISSN 0974-5645

Indian Journal of Science and Technology


Indian Journal of Science and Technology

Year: 2022, Volume: 15, Issue: 36, Pages: 1800-1807

Original Article

Precursor Molarity Influence on Sprayed Mo-doped ZnO Films for solar cells

Received Date:30 April 2022, Accepted Date:03 September 2022, Published Date:21 September 2022


Objectives: Current research focuses on the role of precursor molarity effect on sprayed Mo-doped ZnO films and their suitability as window layers in solar cells. Methods: Molybdenum (Mo) doped zinc oxide (MZO) thin films were deposited by the technique of spray pyrolysis, varying the Zn molarity in the range, of 0.01 M to 0.20 M at a constant substrate temperature of 400 ◦C. The Mo doping concentration was constant at 2 at. %. Findings: The XPS studies witnessed the presence of Mo and Zn in +6 and +2 state respectively. The XRD pattern showed both (111) and (002) as strong peaks, confirming the hexagonal wurtzite crystal structure. The optical investigations showed that the MZO films with Zn molarity 0.10 M exhibited high optical transmittance having a wide energy band gap. Films with zinc molarity of 0.10 M showed low resistivity and high mobility. The prepared CTS/MZO hetero junction solar cells performance was studied by evaluating parameters such as open circuit voltage (Voc) of 0.14 V, short circuit current density (Jsc) of 6.46 mA cm-2, a fill factor (FF) of 0.27, and a conversion efficiency of 0.25 %. Novelty: Studies on the physical properties of Mo:ZnO layers such as Ritveld refinement analysis and Haze were reported first time. CTS/MZO hetero junction solar cells have not yet been published. The observed results are analogous to improve the efficiency of solar cells using environmentally benign materials.

Keywords: Spray pyrolysis; Thin films; XRD; Optical properties; Haze; Hall measurements


  1. Buryi M, Remeš Z, Babin V, Chertopalov S, Děcká K, Dominec F, et al. Free-Standing ZnO:Mo Nanorods Exposed to Hydrogen or Oxygen Plasma: Influence on the Intrinsic and Extrinsic Defect States. Materials. 2022;15(6):2261. Available from: https://doi.org/10.3390/ma15062261
  2. Fang Y, Commandeur D, Lee WC, Chen Q. Transparent conductive oxides in photoanodes for solar water oxidation. Nanoscale Advances. 2(2):626–632. Available from: https://doi.org/10.1039/C9NA00700H
  3. Goyal D, Solanki P, Marathe B, Takwale M, Bhide V. Deposition of Aluminum-Doped Zinc Oxide Thin Films by Spray Pyrolysis. Japanese Journal of Applied Physics. 1992;31(Part 1, No. 2A):361–364. Available from: https: //doi.org/10.1143/JJAP.31.361
  4. Major S, Kumar S, Bhatnagar M, Chopra KL. Effect of hydrogen plasma treatment on transparent conducting oxides. Applied Physics Letters. 1986;49(7):394–396. Available from: https: //doi.org/10.1063/1.97598
  5. Goyal D, Takwale MG, Bhide VG. National solar energy Convention. (pp. 218) New Delhi. Tata McGraw-Hill. 1990.
  6. Owoeye EVA, Ajenifuja A, Adeoye AOE, Salau S, Adewinbi A. Effect of precursor concentration on corrosion resistance and microstructure of ZnO thin films using spray pyrolysis method. Scientific African. 2022;p. e01073. Available from: https://doi.org/10.1016/j.sciaf.2021.e01073
  7. Alam MW, Ansari MZ, Aamir M, Waheed-Ur-Rehman M, Parveen N, Ansari SA. Preparation and Characterization of Cu and Al Doped ZnO Thin Films for Solar Cell Applications. Crystals. 12(2):128. Available from: https://doi.org/10.3390/ cryst12020128
  8. Mansouri F, Khaaissa Y, Abdelalitalbi K, Nouneh. Molarity Dependent on CVD Misted ZnS Buffer Layer Performance. International Journal of Thin Film Science and Technology. 2021;10(3):239–248. Available from: http://dx.doi.org/10.18576/ijtfst/100314
  9. Hat AE, Chaki I, Essajai R, Mzerd A, Schmerber G, Regragui M, et al. Growth and Characterization of (Tb,Yb) Co-Doping Sprayed ZnO Thin Films. Crystals. 2020;10(3):169. Available from: https://doi.org/10.3390/cryst10030169
  10. Speaks DT. Effect of concentration, aging, and annealing on sol gel ZnO and Al-doped ZnO thin films. International Journal of Mechanical and Materials Engineering. 2020;15(1). Available from: https://doi.org/10.1186/s40712-019-0113-6
  11. Shishiyanu ST, Shishiyanu TS, Lupan OI. Sensing characteristics of tin-doped ZnO thin films as NO2 gas sensor. Sensors and Actuators B: Chemical. 2005;107(1):379–386. Available from: https://doi.org/10.1016/j.snb.2004.10.030
  12. Ozgur U, Alivov YI, Liu C, Teke A, Reshchikov MA, Dogan S, et al. A comprehensive review of ZnO materials and devices. J.Appl. Phys. 2005. Available from: https: //doi.org/10.1063/1.1992666
  13. Joseph BG, Gopchandran KG, Manoj PK, Koshy PK, Vaidyan VK. Optical and electrical properties of zinc oxide films prepared by spray pyrolysis. Bulletin of Materials Science. 1999;22(5):921–926. Available from: https://doi.org/10.1007/BF02745554
  14. Krc J, Lipovsek B, Bokalic M, Campa A, Oyama T, Kambe M, et al. Potential of thin-film silicon solar cells by using high haze TCO superstrates. Thin Solid Films. 2010;518(11):3054–3058. Available from: https://doi.org/10.1016/j.tsf.2009.09.164
  15. Gokulakrishnan V, Parthiban S, Jeganathan K, Ramamurthi K. Investigation of Molybdenum Doped ZnO Thin Films Prepared by Spray Pyrolysis Technique. Ferroelectrics. 2011;423(1):126–134. Available from: https://doi.org/10.1080/00150193.2011.620898
  16. He M, Lokhande AC, Kim IY, Ghorpade UV, Suryawanshi MP, Kim JH. Fabrication of sputtered deposited Cu2SnS3 (CTS) thin film solar cell with power conversion efficiency of 2.39 %. Journal of Alloys and Compounds. 2017;701:901–908. Available from: https://doi.org/10.1016/j.jallcom.2017.01.191
  17. Dahman H, Mir LE. Cu2SnS3 thin films deposited by spin coating route: a promise candidate for low cost, safe and flexible solar cells. Journal of Materials Science: Materials in Electronics. 2015;26(8):6032–6039. Available from: https://doi.org/10.1007/s10854-015-3180-3


© 2022 Chevva et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Published By Indian Society for Education and Environment (iSee


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