In this context, the work of this PhD thesis aims to develop coated upconversion nanopowder based thin films to extend the spectral sensitivity of solar cells to the NIR (Near Infra Red) spectrum.The idea is to investigate the efficiency of a low temperature procedure to get an efficient upconversion emission that can be used to improve the performance of Si solar cells. To address this issue, special attention is given to the upconversion luminescence process in which the sequential absorption of two or more photons leads to the emission of light at shorter wavelength (Visible) than the excitation wavelength (Near Infra Red) that can be reabsorbed by the cell. Unfortunately, one of the main drawbacks of Si solar cells is their limited efficiency absorption of long wavelength sunlight. Using photovoltaic cells, the energy of sunlight can be converted into electricity. Solar energy remains one of the most common renewable energy sources. Broadband reflection between 3 nm wavelengths has been suppressed to 2% for nano-grass Solar cell and maximum efficiency of 16.57% is achieved. Eventually all the spin doped silicon nano-grass solar cell with sol–gel Al2O3 passivation provides a very promising route of cost effective high efficiency silicon solar cell technology. Later front surface has been passivated by sol–gel Al2O3 passivation. The sheet resistance of the nano-grass silicon wafer is varied with respect to different spin-on diffusion profile. Adopting the idea by simulation method this paper has reported silicon front sided nano-grass n-type c-Si solar cell by spin on diffusion source and rapid thermal annealing. The detrimental effect of nano-grass formation on both side of the wafer is briefly demonstrated here by simulation methods. This results in ultimate reduction of efficiency. During this chemical etching unwanted nanograss is formed on both side of the wafer, resulting considerable transmission loss from rear side. Highly ordered silicon nano-grass is formed by chemical etching process. Organic solar cell (OSC), spray coating, fluid quantity and low investment costs, unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, undergraduate, research, Universiti Malaysia Sarawak.Silicon nano-grass Solar cell has the advantage of enhancing efficiency with cost effective method.
Project Report (B.Sc) -University Malaysia Sarawak, 2017. Besides, the spray coating method is also able to produce a smoother surface morphology than Parameters of 10 cm height, 8 spray times and airbrush pressure of 0.1 MPa. Based on the results of this study, the spray coating method is able to produce a film-thickness nearest to the thickness of spin coating at the However, the AFM can produce a greater level of detail for surfaces when compared to SEM. The SEM and AFM are used to read across the surface of the samples and they are capable to sense the smallest variations on the Furthermore, the comparison between surface morphology of spin and spray coated samples have also been observed and The data of thickness measurement for spin and spray coating methods was graphed with high-low lines in order to facilitate reporting of observational studies. Therefore, the parameters included the distance between nozzle and glass substrate, number of spray times and pressure of airbrush have been taken into account.
Apart from that, I also want to examine at which parameters of spray coating method are able to produce a filmthickness near to the thickness of the spin coating method. Therefore, this study wasĬonducted in order to observe the difference of surface morphology and thickness between spin and spray coating methods when an active layer of P3HT:PCBM inĬhlorobenzene was fabricated on the glass substrate. Nowadays, OSC has a lot of demand because of its production is cheaper than the inorganic solar cell where the spray coating method is introduced due to its ability to reduce waste of fluid quantity and low investment costs. Bulk-heterojunction structure consists of anode electrode, hole transporting layer, active layer, electron transporting layer, cathode electrode and substrate. OSC consists of single layer, bilayer and bulk-heterojunction Organic solar cell (OSC) is a renewable energy device that used to convert sunlight into electrical energy.
Solarcell ir coating pdf#
PDF (Please get the password from Digital Collection Development Unit, ext: 082-583932 / 082-583914) Fabrictaion of an active layer of organic solar cell (OSC) by using spray coating.
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