Copper zinc tin sulfide(CZTS)thin film was synthesized on soda lime glass substrate by using spin coating method.The synthesized CZTS thin film showed maximum absorption coefficient of 0.193×104 cm-1 and maximum ...Copper zinc tin sulfide(CZTS)thin film was synthesized on soda lime glass substrate by using spin coating method.The synthesized CZTS thin film showed maximum absorption coefficient of 0.193×104 cm-1 and maximum extinction coefficient of 0.011.The direct optical band gap,Urbach energy and steepness parameter of the synthesized CZTS thin film were 1.52 eV,0.52 eV and 0.05 respectively.The CZTS thin film was found to be polycrystalline tetragonal in nature.The scanning electron microscopy(SEM)revealed that the texture structure was formed for the CZTS thin film.展开更多
Renewable energy technology is one of the prospective sources which can meet the energy demand and can contribute to achieve sustainable development goals.Concentrated collectors are widely used in solar thermal power...Renewable energy technology is one of the prospective sources which can meet the energy demand and can contribute to achieve sustainable development goals.Concentrated collectors are widely used in solar thermal power generation and water heating system also.It is very popular due to its high thermal efficiency,simple construction requirements and low manufacturing cost.This paper is concerned with an experimental study of parabolic trough collector for water heating technology.It focuses on the performance of concentrating solar collector by changing the reflector materials(aluminum sheet,aluminum foil and mirror film).In Bangladesh,it is possible to use low cost solar concentrating technologies for domestic as well as industrial process heat applications.The line focusing parabolic trough collectors have been designed,developed and evaluated its performance by collecting solar radiation,inlet and outlet water temperature,flow rate,efficiency etc.展开更多
Small-scale vertical axis wind turbine (VAWT) rotor is developed for use in areas lacking adequate energy infrastructure. The materials and methods of construction are selected to minimize cost as much as possible. Th...Small-scale vertical axis wind turbine (VAWT) rotor is developed for use in areas lacking adequate energy infrastructure. The materials and methods of construction are selected to minimize cost as much as possible. The paper describes the design of different kinds of vertical axis wind turbine rotors having different number of blades and twist angle. The aim of the work is to study the influence of the different designs on rotational speed and power of rotor in different wind speed.展开更多
Due to the availability, non-toxicity and cost-effectivity, natural dyes are becoming popular day by day. This study explains the fabrication method of dye-sensitized solar cells (DSSCs) using natural dyes containing ...Due to the availability, non-toxicity and cost-effectivity, natural dyes are becoming popular day by day. This study explains the fabrication method of dye-sensitized solar cells (DSSCs) using natural dyes containing anthocyanins extracted from pomegranate, blackberry and beetroot. Doctor blade method was employed to prepare TiO2 film as photoanode on FTO glass. The structural and morphological properties of photoanode was studied using X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM), respectively. The extracted dye absorption was evaluated by UVVis- NIR spectroscopy. The fabricated cells have efficiency in the range of 0.015-0.042% which has been measured by sun simulator.展开更多
文摘Copper zinc tin sulfide(CZTS)thin film was synthesized on soda lime glass substrate by using spin coating method.The synthesized CZTS thin film showed maximum absorption coefficient of 0.193×104 cm-1 and maximum extinction coefficient of 0.011.The direct optical band gap,Urbach energy and steepness parameter of the synthesized CZTS thin film were 1.52 eV,0.52 eV and 0.05 respectively.The CZTS thin film was found to be polycrystalline tetragonal in nature.The scanning electron microscopy(SEM)revealed that the texture structure was formed for the CZTS thin film.
文摘Renewable energy technology is one of the prospective sources which can meet the energy demand and can contribute to achieve sustainable development goals.Concentrated collectors are widely used in solar thermal power generation and water heating system also.It is very popular due to its high thermal efficiency,simple construction requirements and low manufacturing cost.This paper is concerned with an experimental study of parabolic trough collector for water heating technology.It focuses on the performance of concentrating solar collector by changing the reflector materials(aluminum sheet,aluminum foil and mirror film).In Bangladesh,it is possible to use low cost solar concentrating technologies for domestic as well as industrial process heat applications.The line focusing parabolic trough collectors have been designed,developed and evaluated its performance by collecting solar radiation,inlet and outlet water temperature,flow rate,efficiency etc.
文摘Small-scale vertical axis wind turbine (VAWT) rotor is developed for use in areas lacking adequate energy infrastructure. The materials and methods of construction are selected to minimize cost as much as possible. The paper describes the design of different kinds of vertical axis wind turbine rotors having different number of blades and twist angle. The aim of the work is to study the influence of the different designs on rotational speed and power of rotor in different wind speed.
文摘Due to the availability, non-toxicity and cost-effectivity, natural dyes are becoming popular day by day. This study explains the fabrication method of dye-sensitized solar cells (DSSCs) using natural dyes containing anthocyanins extracted from pomegranate, blackberry and beetroot. Doctor blade method was employed to prepare TiO2 film as photoanode on FTO glass. The structural and morphological properties of photoanode was studied using X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM), respectively. The extracted dye absorption was evaluated by UVVis- NIR spectroscopy. The fabricated cells have efficiency in the range of 0.015-0.042% which has been measured by sun simulator.
