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11	Optical Property Study of 2D Graded Photonic Super-Crystals for Photon Management Hassan, Safaa 05 1900 (has links) In this dissertation, we study the optical property of 2D graded photonic super-crystals (GPSCs) for photon management. We focused primarily on manipulation and control of light by using the newly discovered GPSCs which present great opportunity for electromagnetic wave control in photonic devices. The GPSC has been used to explore the superior capability of improving the light extraction efficiency of OLEDs. The enhancement of extraction efficiency has been explained in term of destructive interference of surface plasmon resonance and out-coupling of surface plasmon through phase matching provided by GPSC and verified by e-field intensity distributions. A large light extraction efficiency up to 75% into glass substrate has been predicted through simulation. We also study the light trapping enhancement in GPSCs. Broadband, wide incident angle, and polarization independent light trapping enhancement is achieved in silicon solar cells patterned with the GPSCs. In addition, novel 2D GPSCs were fabricated using holographic lithography through the interference lithography by two sets of multiple beams arranged in a cone geometry using a spatial light modulator (SLM). Finally, we also report a fabrication of GPSCs with a super-cell size of 12a×12a by using e-beam lithography. Diffraction pattern from GPSCs reveals unique diffraction properties. In an application aspect, light emitting diode arrays can be replaced by a single light emitting diode shinning onto the diffraction pattern for a uniform fluorescence. Graded Photonic Super-Crystals Organic Light-Emitting Diodes (OLED) Silicon Solar Cell Light Absorption Holographic Fabrication Spatial Light Modulator (SLM) E-Beam Lithography Light Trapping
12	The modernization of a DOS-basedtime critical solar cell LBICmeasurement system. Hjern, Gunnar January 2019 (has links) LBIC is a technique for scanning the local quantum efficiency of solar cells. This kind of measurements needs a highly specialized, and time critical controlling software. In 1996 the client, professor Markus Rinio, constructed an LBIC system, and wrote the controlling software as a Turbo-Pascal 7.0 application, running under the MS-DOS 6.22 operating system. By now (2018) both the software and several hardware components are in dire need to be modernized. This thesis thoroughly describes several important aspects of this work, and the considerations needed for a successful result. This includes both very foundational choices about the software architecture, the choice of suitable operating system, the threading model, and the adaptation to new hardware with vastly different behavior. The project also included a new hardware module for position reports and instrument triggering, as well as several adaptations to transform the DOS-based LBIC software into a pleasant modern GUI application. Pascal programming language Linux operating system real-time PREEMPT_RT patch Free Pascal compiler Lazarus multi-threading computer controlled measurements false color map refactoring software modernization adaptation layer MS-DOS GPIB IEEE-488 silicon solar cell quantum efficiency LBIC electron recombination serial communication micro-controller ISR incremental encoder lock-in amplifier trans-impedance amplifier triggered measurement Computer and Information Sciences Data- och informationsvetenskap
13	Modifikace struktury křemíkových solárních článků / Modification of silicon solar cells structure Strachala, Dávid January 2014 (has links) The aim of the work is to create a coherent overview of the silicon monocrystaline solar cell in terms of the physical principle of the structure and sequence of technological operations necessary for its production. The effect of individual manufacturing steps is discussed in relation to the requirement of decreasing recombination, optical and ohmic losses of the monocrystalline solar cell. Due to a theoretical assumption, one-dimensional model of solar cell was created in a PC1D software that was later optimized to achieve the highest possible efficiency. Using the available technologies, final model of the solar cell is manufactured in Solartec company and in the end of the work compared with the output of simulation.

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