Abstract
Owing to superior optical properties, ZnO thin films have immense potential in solar cell preparation. ZnO thin films were prepared by sol–gel technology. However, this is prolonged technique and it necessitates a complex precursor solution. In the present work, ZnO thin films are prepared by sol–gel spin coating with simple precursor, zinc acetate. A very remarkable feature of the method is that polycrystalline, non-abrasive and translucent films were obtained. Additionally, novel PbS:Hg quantum dots (QDs) and CdS QDs are successfully synthesized. Moreover, both types of QDs are deposited layer-by-layer over pure ZnO and Ag:ZnO thin films. The films are characterized by X-ray diffraction, and crystallinity continuation is observed even after the addition of QDs layer. Presence of synthesized QDs over thin films is also confirmed. The films were also characterized by scanning electron microscopy (SEM) and UV–Vis spectroscopy. Uniform, dense and porous surface morphology is clearly revealed. Sensitized thin films show a huge decline in band gap and large enhancement in efficiency. Superior current density (\(10.87~\hbox {mA}~\hbox {cm}^{-2})\) is achieved with PbS:Hg/CdS/Ag:ZnO, which leads to enhancement in overall solar conversion efficiency by 6.34 times.
Similar content being viewed by others
References
Choi H, Nahm C, Kim J, Kim C, Kang S, Hwang T et al 2013 Curr. Appl. Phys. 13 2
Hu Y, Wang B, Zhang J, Wang T, Liu R, Zhang J et al 2013 Nanoscale Res. Lett. 8 1
Li Y, Yu H, Song W, Li G, Yi B and Shao Z 2011 Int. J. Hydrog. Energy 36 14374
Gupta M, Sharma V, Shrivastava J, Solanki A, Singh A P, Satsangi V R et al 2009 Mater. Sci. B 32 23
Zhang X, Lu X, Shen Y, Han J, Yuan L, Gong L et al 2011 Chem. Commun. 47 5804
Shejale K P, Laishram D, Gupta R and Sharma R K 2017 Energy Tech. 5 489
Laishram D, Shejale K P, Sharma R K and Gupta R 2016 RSC Adv. 6 78768
Ma J, Fu W, Yang H, Cheng S, Zhang L, Zhou X et al 2013 Thin Solid Films 545 296
Lee Y L, Huang B M and Chien H T 2008 Chem. Mater. 20 6903
Li L, Yang X, Gao J, Tian H, Zhao J, Hagfeldt A et al 2011 J. Am. Chem. Soc. 133 8458
Chen H M, Chen C K, Chang Y C, Tsai C W, Liu R S, Hu S F et al 2010 Angew. Chem. 122 6102
Zhou Z, Yuan S, Fan J, Hou Z, Zhou W, Du Z et al 2012 Nanoscale Res. Lett. 7 1
Yu W W, Qu L, Guo W and Peng X 2003 Chem. Mater. 15 28540
Chou C Y, Li C T, Lee C P, Lin L Y, Yeh M H, Vittal R et al 2013 Electrochim. Acta 88 35
Nozik A J 2008 Chem. Phys. Lett. 457 3
Lee J W, Hong J D and Park N G 2013 Chem. Commun. 49 6448
Senthil K, Tak Y, Seol M and Yong K 2009 Nanoscale Res. Lett. 4 1329
Abd-Elkader O H and Deraz N M 2014 Int. J. Mol. Sci. 15 1842
Lee W, Min S K, Dhas V, Ogale S B and Han S H 2009 Electrochem. Commun. 11 103
Niesen T P and De Guire M R 2001 J. Electroceram. 6 169
Khan W, Khan Z A, Saad A A, Shervani S, Saleem A and Naqvi A H 2013 Int. J. Mod. Phys. 22 630
Mondal S, Kanta K P and Mitra P 2008 J. Phys. Sci. 12 221
Ilican S, Caglar Y, Caglar M and Demirci B 2008 J. Optoelectron Adv. Mater. 10 2592
Thambidurai M, Muthukumarasamy N, Velauthapillai D, Lee C and Kim J Y 2012 J. Sol–Gel Sci. Tech. 64 750
Mali S S, Desai S K, Kalagi S S, Betty C A, Bhosale P N, Devan R S et al 2012 Dalton Trans. 41 6130
Acknowledgements
We would like to thank Chemical Engineering Department, S.V. National Institute, for providing facilities to carry out experimental work and sophisticated analytical instrument facility, S.V. National Institute of Technology, for rendering analytical service for this work.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
LANJEWAR, M., GOHEL, J.V. Highly enhanced solar conversion efficiency of novel layer-by-layer PbS:Hg and CdS quantum dots-sensitized ZnO thin films prepared by sol–gel spin coating. Bull Mater Sci 41, 151 (2018). https://doi.org/10.1007/s12034-018-1664-5
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s12034-018-1664-5