Chapter 9 concludes with a summary of the characteristic parameters comprising all four solar cell architecture, an overall assessment, some suggestions for future investigations and a comprehensive bibliography.
All devices discussed in the Chapters on double layer, blends and laminated structures show spectral responses covering at least the wavelength range of visible light. The subsequent Chapters deal with the four known device architectures: However, we have also found that the shunt resistor grows 30 to times faster than the series resistor with increasing film thickness favouring thicker films for larger fill factors.
Our results together with the recent literature indicate that heating into the liquid crystalline phase is not necessary. The circuit is constructed of different unit elements based on the one-diode model.
Chapter 2 is aimed to introduce researchers who are planning to work on organic solar cells into this very specialised but also interdisciplinary field.
In this paper, we use a distributed circuit model to investigate lateral inhomogeneity effects on silicon wafer solar cells. Two devices even had a clear photo-response down to a wavelength of nm. The object of this thesis was the investigation of various types of organic semiconductors preferably with low bandgaps in different solar cell architectures.
This is also reflected in the long list of people mentioned in the acknowledgment and consistent with the fact that modern research relies on collaboration and teamwork. The outstanding properties of discotic liquid crystals justify the discussion of this device in a Chapter separated from the single layer device Chapter.
Each of them begins with a survey of characteristic parameters of already reported devices - including the results of this thesis - pointing out specific advantages and encountered problems. It also comprises a survey of the interesting transport charge carrier mobility properties of liquid crystalline semiconductors as well as the mesogenic characterization of a series of discotic molecules from which one has been used to fabricate a single layer solar cell.
Then, the current-voltage characteristics obtained by the distributed circuit model are compared with those obtained from measurements.
The single layer device comprising PTV shows a very strong monoton dependency of the EQE on the wavelength so that the device can be used as simple colour - or even - wavelength detector covering the entire visible range. However, the following findings may be of particular interest for both experts and newcomers in the field: Two laminated devices are discussed in Chapter 6.
We have introduced a new device architecture that combines advantages of double layer and blend devices and opens exciting new possibilities in device design such as selective doping. We have studied effects of film thickness and have found that those devices that have the thinnest films nm, which is near the estimated exciton diffusion length give the highest currents.
In fact, this Chapter contains a unique compilation and summary of "organic solar cell relevant knowledge" that is consistent with the experience, understanding and view of the author.
Under a Creative Commons license open access Abstract Solar cell models implemented in simulation packages for example Sentaurus TCAD are typically restricted either to only one or two dimensions, or to small scales. Finally, one kind of large-scale lateral effect, the voltage distribution across the solar cell area, is analysed.
In Chapter 8 we describe how the standard solar spectrum can be simulated with a relatively simple setup that can be built in most laboratories for a fraction of the cost of commercial simulators.
Due to lateral ohmic voltage drops, the electric potential at the cell surface is shown to be higher in the middle between two busbars or fingers than close to them. In Chapter 7 we have shown that dyes with liquid crystalline properties can be used as active semiconducting components in solar cells.
They therefore neglect effects of local inhomogeneities or large scale phenomena such as lateral transport to fingers or busbars. First, the design of the distributed circuit model is described.
Chapter 7 concerns single layer devices comprising a liquid crystalline semiconductor. The presented model is used to simulate the distributed current flow in a solar cell. Previous article in issue. How solar cell efficiencies can be determined in a reasonable yet practical way either by setting up a solar simulator or numerical simulation is discussed in Chapter 8.
A method to estimate the optimal thickness has been introduced. Details of sample preparation and measurements as well as a list of publications by the author and a brief CV can be found in the Appendices in Chapter Electrical simulation of organic solar cells in solar category is one of his thesis example simulation.
and simulation for thin film solar cell.
The general trends in the past decade of increasing solar cell efficiency, decreasing PV system costs, increasing government incentive programs, and several other thesis proposes is an approach to control the inverters real and reactive power output to grid-tied PV system was performed in the PSCAD software simulation environment.
Solar cell parameters used in the simulation of this work. j sc is the short-circuit current density, j s is the reverse saturation current density, w b is the width of a busbar, w b is the width of a finger, l f is the length of a finger, d f is the distance between two fingers, h b is the height of a busbar, h f is the height of a finger, ß.
MODELING AND SIMULATION OF A DUAL-JUNCTION CIGS SOLAR CELL USING SILVACO ATLAS. Konstantinos Fotis: Lieutenant, Hellenic Navy photovoltaic cell is investigated in this thesis. Research into implementing a dual-junction I would like tothank a former graduate student of the Naval Postgraduate School.
solar cell structures, cells featuring a local BSF (LBSF) have demonstrated some of the highest e ciencies seen to date. Implementation of this technology in industry, however.
1. Introduction. AMPS is a well-known solar cell simulation tool developed by Fonash et al. at the Pennsylvania State mint-body.com is particularly well adapted to simulating amorphous and polycrystalline solar cells with large densities of .Download