Enhanced solar-driven water splitting by ZnO/CdTe heterostructure thin films-based photocatalysts

Mamoona Riffat, Hassan Ali, H. A. Qayyum, M. Bilal, Tanvir Hussain*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Solar-driven hydrogen production by water splitting using a photocatalyst is considered the most effective approach to produce hydrogen. Hydrogen is the most suitable renewable energy source. The efficiency of hydrogen production is still low. The efficiency of hydrogen production through photocatalysis can be enhanced by preparing a suitable and efficient photocatalyst. In this work, ZnO thin films were deposited on CdTe thin films at 600 °C, 650 °C, and 700 °C temperatures to form ZnO/CdTe heterostructure thin films by chemical vapor deposition (CVD) as photoelectrodes for water splitting. The photoelectrochemical properties showed that ZnO/CdTe heterostructure thin films have better photocurrent response compared to pristine ZnO and CdTe thin films. EIS results showed that the charge transfer at the electrode-electrolyte interface for ZnO/CdTe heterostructure thin films is much better than that of the pristine ZnO film. The ZnO/CdTe-700 °C heterostructure thin film has a 112-fold higher rate of photocatalytic hydrogen generation than pure ZnO.

Original languageEnglish
Pages (from-to)22069-22078
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume48
Issue number58
DOIs
StatePublished - 8 Jul 2023

Bibliographical note

Publisher Copyright:
© 2023 Hydrogen Energy Publications LLC

Keywords

  • Chemical vapor deposition
  • Heterostructures
  • Hydrogen generation
  • Photoelectrochemical properties
  • Solar energy

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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