Master of Engineering Science( Research)
Kam Chi Kent( Award Conferred 23 July 2025)
Koay Kang Hao( Award Conferred 19 February 2025)
Darren Tze Huei Lee( Award Conferred 23 July 2025)
Afri Ahamed Mohamed Rasmi( Award Conferred 15 June 2025)
DOCTOR OF PHILOSOPHY
Chong Wei Kean( Award Conferred 2 April 2025)
Title of Thesis:‘ Development of Highly Effective Zinc Indium Sulfide-Based Photocatalytic System for Solar-Driven Overall Water Splitting.’
Solar energy, the most abundant yet underutilised renewable resource, stands as the quintessential focal point for technological innovation in response to escalating global energy demand and environmental concerns. Solar-driven water splitting, driven by light-activated photocatalysts, holds the promise of harnessing solar energy to produce clean hydrogen fuel. This study delves into the exploration and development of a highly efficient zinc indium sulfide-based photocatalytic system, from both experimental investigations and computational analyses, to realise ambient solar-driven water splitting to generate hydrogen as an ideal substitute for fossil fuels.
Supervisor: Professor Siang Piao Chai Associate Supervisor: Dr Boon Junn Ng Associate Supervisor: Dr Lling Lling Tan
Ming-Wei Chu( Award Conferred 7 September 2025)
Title of Thesis:‘ Ferroelectric-Modulated Photocathode BiFeO3( BFO) Thin Film Heterostructures via Rare-Earth Substitutions.’
Ferroelectric polarization in the p-type bismuth ferrite( BFO) thin film heterostructures is effectively modulated through the choice of crystal facet orientations( i. e.,( 001)-facet and( 111)-facet), polarization directions( i. e., upward polarization and downward polarization), and rare-earth( RE) doping( i. e., 7 % Nd, 10 % Sm, and 7 % Gd). The manipulated ferroelectricity tunes the efficiency of charge separation, transfer, and recombination in photoelectrochemical( PEC) water splitting significantly. Among all the samples, the 7 % Gd-doped BFO( BGFO) heterostructure coupled with( 111)-facet and upward polarization exhibits the highest ferroelectric polarization and charge dynamics due to its lowest oxygen vacancy concentration and electrical leakage. Thus, the BGFO is most effective in facilitating separation and transport of charge carriers and shielding charge recombination, leading to the increased incident photon-to-current efficiency( IPCE), interfacial charge accumulation, and downward band bending at the BGFO / electrolyte interface in the PEC water reduction.
Supervisor: Associate Professor Chang Wei Sea External Supervisor: Associate Professor Chang Fu Dee
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