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The performance of Cu2ZnSnS4(CZTS) solar cell was investigated using a simulator called Solar Cell Capacitance Simulator(SCAPS). An n doped Zinc Oxide(n-ZnO)/Indium Sulfide(In2S3)/CZTS structure was used in the simulation. These materials are cheap and non-toxic which is an important factor keeping the idea of mass production in mind. The performance was recorded for different thicknesses of CZTS...
In this paper, single CZTSe layer and stacked layer of CZTS and CZTSe have been optimized as absorber layers in thin film solar cell and the variation of cell performance was observed. CZTSe layer was optimized by varying thickness, carrier density and defect density and obtained Jsc of 27.87 mAcm-2, Voc of 0.702V, fill factor of 65.41% and efficiency of 12.79%. By varying the thickness and carrier...
This paper proposes a utility supply driven single stage PFC based LED driver using Cúk converter. For low DC voltage output requirement of LED driver, Cúk converter is a convenient choice due to its topological suitability for PFC application and stepping the voltage down at a desired level unlike the Boost Converter. A hysteresis current control scheme is adopted to operate the converter in Continuous...
An improved algorithm for MTPA (Maximum Torque Per Ampere) and Field Weakening operation which is suitable for implementation with Field Oriented Control, has been proposed for the Synchronous Reluctance motor (SynRel) for high dynamic performance. The proposed method overcomes the problem of excessive current flow into the machine while generating the d-axis and q-axis current commands independently...
In this paper, numerical analysis was done to evaluate the performance of newly modified structure of CdS/CdTe based thin film solar cell. In this proposed cell conventional absorber CdTe layer, back contact Ni was used along with a 500nm thick Cu2Te BSF layer. The viability of ultra-thin CdTe absorber layer was examined together with newly added CdS:O layer instead of conventional CdS layer. It was...
In this paper, the performance of Cu2ZnSnS4 (CZTS) thin film solar cell has been analysed numerically using SCAPS-1D. Firstly, the thickness, carrier density and defect density of CZTS absorber layer and then the thickness and carrier density of CdS buffer layer was varied to observe their effect on the cell performance. From the simulated results, the optimal thickness of 3000 nm, carrier density...
This paper has numerically evaluated the performance of a proposed modified structure of thin film solar cell based on CdS/CdTe. In this proposed cell, conventional CdTe layer has been used as absorber, but a new back contact Ni has been used along with newly introduced 100 nm thick ZnO layer to increase the performance of the conventional solar cell. The feasibility of ultra-thin CdTe absorber layer...
In LTE, resource scheduling algorithm is one of the key parameters that determine the overall system and UE performances in terms of throughput and fairness respectively. Multiple scheduling techniques are available that emphasizes on optimizing any one of the key system performance parameters. Among them the most potential algorithms are proportional fair (PF) and round robin (RR). PF optimizes UE...
Nanoplasmonic couplers using gallium lanthanum sulfide (GLS) and cuprous oxide (Cu2O) are proposed. Their characteristics and performances are analyzed numerically using the finite-difference time-domain (FDTD) method. A coupling efficiency of 67% has been achieved at the optical communication wavelength when GLS is used as the coupler whereas a coupling efficiency of 56% has been achieved when cuprous...
Multimedia streaming applications are among the most energy hungry applications in smartphones. The energy consumption mostly depends on the delivery techniques and on the power management techniques of wireless interfaces (Wi-Fi and 3G). In order to provide insights on what kind of streaming techniques exist, how they work on different mobile platforms, and what is their impact on the energy consumption...
Generally smart grid is a modern technology of power system which can convert the whole power system in to digital format. In brief, a smart grid is the use of sensors, communications, computational ability and control in some form to enhance the overall functionality of the electric power delivery system. A system becomes smart by sensing, communicating, applying intelligence, exercising control...
The electrical characteristics of a 60W, 12V PV panel is presented on this paper for geographical location of Latitude = 23° 43′N and Longitude = 90°25′E (Islamic University of Technology, Gazipur, Dhaka, Bangladesh). The open circuit voltage and short circuit current of the panel are measured and recorded at an interval of three minutes along with the total solar irradiation. The total solar irradiation...
As is well known, analyzing the frequency components of the EEG is important for the sleeping. There are many methods of studies to analyze the EEG frequency data for recognizing the sleep and its quality, and so on. However, there is no established method for the analysis of the sleeping EEG. For this reason we went for a very useful tool in signal analysis - spectral analysis. An analysis of the...
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