Cochin University of Science and Technology

About: Cochin University of Science and Technology is a education organization based out in Kochi, Kerala, India. It is known for research contribution in the topics: Thin film & Natural rubber. The organization has 5382 authors who have published 7690 publications receiving 103827 citations. The organization is also known as: CUSAT & Cochin University.

Hydrogen from photo-electrocatalytic water splitting

Abstract: Photoelectrochemical water splitting has been frontier research in the last 50 years to meet the energy demand from sustainable hydrogen production. Various materials have designed and engineered to split the water to the constituents. However, the efforts in this regard do not lead the process to a viable scale. The chapter deals with the perspective on the current scenario of material designing approach and its consequences. Also, a revisit to the genesis of the photoelectrochemical water splitting in the boom years and cited the essential articles in the field appeared before 1990 in the form of a chronological table. A prospect for the future of the field has been suggested based on the effect of the photon as well as electric field together in the system—also, a proposition on the materials design aspects given.

Influence of substrate temperature on the properties of vacuum evaporated InSb films

Abstract: Indium Antimonide (InSb) thin films were grown onto well cleaned glass substrates at different substrate temperatures (303, 373 and 473 K) by vacuum evaporation. The elemental composition of the deposited InSb film was found to be 52.9% (In) and 47.1% (Sb). X-ray diffraction studies confirm the polycrystallinity of the films and the films show preferential orientation along the (111) plane. The particle size (D), dislocation density (δ) and strain (e) were evaluated. The particle size increases with the increase of substrate temperature, which was found to be in the range from 22.36 to 32.59 nm. In Laser Raman study, the presence of longitudinal mode (LO) confirms that the deposited films were having the crystalline nature. Raman peak located at 191.26 cm–1 shift towards the lower frequencies and narrows with increase in deposition temperature. This indicates that the crystallinity is improved in the films deposited at higher substrate temperatures. Hall measurements indicate that the films were p-type, having carrier concentration ≅1016 cm–3 and mobility (4–7.7) ×103 cm2/Vs. It is observed that the carrier concentration (N) decreases and the Hall mobility (μ) increases with the increase of substrate temperature. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)