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In this paper, a Ba0.6Sr0.4TiO3 (BST) tunable phase shifter with TiO2 films as microwave buffer layer between BST and silicon (Si) substrates is presented. The TiO2 buffer layer is grown by atomic layer deposition (ALD) onto Si substrate followed by pulsed laser deposition (PLD) of BST thin films onto the TiO2 buffer layer. The phase shifter fabricated on(More)
In a stand alone system such as a hybrid electrical vehicle (HEV) and an electrical propulsion ship, an electric energy is transferred from a generator to a target motor via a converter-inverter set to control the motor torque or speed. In this case, whole power is handled by the converter-inverter system, and the power rating of the converter tends to be(More)
Highly ordered TiO2 nanotube arrays were prepared by anodic oxidation of Ti foil in an application to dye-sensitized solar cells (DSCs). A fullerene derivative called PC61BM was used as a material for the surface modification of TiO2 nanotube arrays to improve the power conversion efficiency of DSCs Although open circuit voltages (Voc) were slightly(More)
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