Papers by Mohd Adib Ibrahim
European Journal of …, 2009
European Journal of Scientific Research ISSN 1450-216X Vol.28 No.1 (2009), pp.141-154 © EuroJourn... more European Journal of Scientific Research ISSN 1450-216X Vol.28 No.1 (2009), pp.141-154 © EuroJournals Publishing, Inc. 2009 http://www.eurojournals.com/ejsr.htm ... Multi-Composition Cu-Zn-Al Catalyst Supported on ZSM-5 for ... Zahira Yaakob Faculty of Chemical and ...
Journal of Materials Research and Technology, 2020
This paper presents a humidity sensing based on perovskites nanostructured thin film for improved... more This paper presents a humidity sensing based on perovskites nanostructured thin film for improved sensitivity and optical performance. The nickel-doped zinc thin oxide (NZTO) perovskites thin film was used as a sensing material for the humidity sensing application. The NZTO was deposited on borosilicate glass substrates via aerosol-assisted chemical vapour deposition (AACVD) and nickel (Ni) dopant with 2 %mol was added into the precursor solution. The optical performance was investigated by inserting the NZTO into the optical reflection cavity. The cavity comprises NZTO on the glass that placed in a fixed position in front of single-mode fiber (SMF) and SMF was adjusted using x-direction of the 3-axis stage to obtained different cavity lengths. The performance was evaluated from the free-spectral range (FSR) and extinction ratio (E R) of the different cavity lengths. Then, the cavity with an optimized length was placed inside the humidity chamber for sensing applications. The result shows that the optimized cavity length is 100 m with FSR and E R of 12.05 nm and 7.247 dB. The sensitivity of the humidity sensing is 0.2657 nm/RH% indicates that the NZTO is an excellent candidate for humidity sensing application.
The surface plays an important role in thin silicon solar cells, especially with regard to the su... more The surface plays an important role in thin silicon solar cells, especially with regard to the surface state and interface electronic properties that influence the electron and hole to recombine. In order to keep the recombination loss at a tolerable minimum and avoid an unacceptably large efficiency loss when moving towards thinner silicon materials, the surface must be electronically wellpassivated. Passivation is the most significant step for the functionalization of silicon. In this study, Si functionalization with a dye molecule might increase the absorption of light that acts as light-harvesting material on the silicon surface. Two types of dye molecular were used; DiL (λpeak = 549 nm) and DiO (λpeak = 484 nm). Both dyes were deposited using a spin-coating technique. These dye layers on the silicon surface were characterized using a Kelvin probe (KP) and photoluminescence (PL) spectroscopy. A different mechanism of slow charge trapping and detrapping was observed using KP meas...
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Papers by Mohd Adib Ibrahim