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Electrodeposition and sol–gel derived nanocrystalline N–ZnO thin films for photoelectrochemical splitting of water: Exploring the role of microstructure

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  • Singh, Nirupama
  • Kumari, Babita
  • Sharma, Shailja
  • Chaudhary, Surbhi
  • Upadhyay, Sumant
  • Satsangi, Vibha R.
  • Dass, Sahab
  • Shrivastav, Rohit

Abstract

Nanocrystalline thin films of nitrogen (N)-incorporated ZnO, deposited on glass substrate by sol–gel (SG) and electrodeposition (ED) routes, have been investigated for their possible relevance to photoelectrochemical (PEC) splitting of water. XRD pattern established dominant evolution of hexagonal wurtzite ZnO. SEM analysis indicated continuous and homogenous growth of particles, while AFM analysis revealed favored growth of nanocrystallites along the c-axis. SG-derived films were denser with reduced film thickness. ED-derived samples were fluffy with relatively rougher top surface. All the samples exhibited broad absorption threshold at ∼400 nm with only marginal dip to the band gap on N incorporation. By comparing the performance of SG- and ED-derived samples, results of the study highlight crucial role of semiconductor microstructure, viz. film thickness, density, particle size and distribution, and film surface characteristics on their PEC response.

Suggested Citation

  • Singh, Nirupama & Kumari, Babita & Sharma, Shailja & Chaudhary, Surbhi & Upadhyay, Sumant & Satsangi, Vibha R. & Dass, Sahab & Shrivastav, Rohit, 2014. "Electrodeposition and sol–gel derived nanocrystalline N–ZnO thin films for photoelectrochemical splitting of water: Exploring the role of microstructure," Renewable Energy, Elsevier, vol. 69(C), pages 242-252.
    • Handle: RePEc:eee:renene:v:69:y:2014:i:c:p:242-252
    DOI: 10.1016/j.renene.2014.03.042
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    1. Lembke B., 1918. "√ a. p," Journal of Economics and Statistics (Jahrbuecher fuer Nationaloekonomie und Statistik), De Gruyter, vol. 111(1), pages 709-712, February.
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    1. Rai, Snigdha & Ikram, Ashi & Sahai, Sonal & Dass, Sahab & Shrivastav, Rohit & Satsangi, Vibha R., 2015. "Photoactivity of MWCNTs modified α-Fe2O3 photoelectrode towards efficient solar water splitting," Renewable Energy, Elsevier, vol. 83(C), pages 447-454.
    2. Sharma, Shailja & Pai, Mrinal R. & Kaur, Gurpreet & Divya, & Satsangi, Vibha R. & Dass, Sahab & Shrivastav, Rohit, 2019. "Efficient hydrogen generation on CuO core/AgTiO2 shell nano-hetero-structures by photocatalytic splitting of water," Renewable Energy, Elsevier, vol. 136(C), pages 1202-1216.
    3. Biswas, Neeraj Kumar & Srivastav, Anupam & Saxena, Sakshi & Verma, Anuradha & Dutta, Runjhun & Srivastava, Manju & Upadhyay, Sumant & Satsangi, Vibha Rani & Shrivastav, Rohit & Dass, Sahab, 2023. "Temperature of photoanode for photoelectrochemical water oxidation," Renewable Energy, Elsevier, vol. 208(C), pages 504-511.

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