Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 250 for “"Optoelectronic devices"”.
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III-V Bismide Optoelectronic Devices
… epitaxy growth, and fabrication of III-V bismide optoelectronic devices, which are of great importance in modern applications of telecommunication, gas sensing, environment monitoring, etc. In the current room-temperature continuous-wave operational GaSb-based type-I InGaAsSb/AlGaInAsSb quantum …
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Nano-structured materials for optoelectronic devices
… desired nano-structures for solution-processable optoelectronic devices such as solar cells and light-emitting diodes (LEDs), and examine structure-performance relationships in these devices. Short exciton diffusion length limits the efficiency of most exciton-based solar cells. By introducing …
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Excitonic spin engineering in optoelectronic devices
… and quantize the fission yield in these devices, demonstrating that an increase in absorption should lead to even higher EQE values. Next, we utilize an optical light trapping scheme to increase the absorption, driving the EQE as high as 126% with no external optics. Finally, we …
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Physics of intraband quantum dot optoelectronic devices
… been obtained with quantum well based intraband devices, such as quantum cascade lasers and quantum well infrared photodetectors. However due to longer carrier lifetimes in quantum dots, it is expected that optoelectronic devices based on intraband transitions in self-assembled quantum dots would …
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Full-band NEGF Modeling of Optoelectronic Devices
L'abstract è presente nell'allegato / the abstract is in the attachment
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Nanoscale Selective Area Epitaxy for Optoelectronic Devices
… potential applications to quantum electronic and optoelectronic devices they present. The nonuniformity and random ordering resulting from the self-assembly processes, however, are detrimental to potential applications, prohibiting the type of engineering control necessary for complex systems. The …
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Applications of spectral management in optoelectronic devices
The application and efficiency of optoelectronic devices depends on the ability to control the absorption and emission processes of photons in semiconductors. This thesis looks at three different applications of spectral management across a broad range of optoelectronic devices: photovoltaics …
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The development of InP-based optoelectronic devices
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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III-V optoelectronic devices in the BGaInAs material system
… In concentrations) affect BGaInAs-based devices, thus providing a path towards lattice-matched optoelectronic devices on Si.
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Tunable Optical Group Delay in Active Semiconductor Optoelectronic Devices
… prospects for tunable delay elements based on optoelectronic devices are discussed.
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Fabrication of site-controlled quantum structures for optoelectronic devices
… quantum dots (QDs) into electronic and optoelectronic devices, utilizing the three-dimensional quantum confinement effect to improve device performance as well as to create devices with new functionalities. However, despite its prevalence in fabrication of QDs, self-assembled QD growth …
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Tailoring angular and spectral behaviour in perovskite optoelectronic devices
… the angular and spectral behaviour of light in optoelectronic devices is crucial for meeting the demands of advanced applications. Advanced technologies such as displays and optical communications require precise management of light emission, particularly in terms of intensity and angular …
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Optoelectronic devices based on graded bandgap structures utilising electroplated semiconductors
The main aim of the work presented in this thesis is to develop low-cost multi-junction graded bandgap solar cells using electroplated semiconductors. The semiconductor materials explored in this research are CdSe, ZnTe, CdS, CdMnTe and CdTe thin films. These layers were characterised for their …
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Designing Nanomaterials For Electronic And Optoelectronic Devices Through Charge Carrier Control
… to be promising materials for electronic and optoelectronic device applications because of their unique size-dependent properties and low-cost solution processability. However, the integration of these materials into devices has been challenging due to a lack of available methods to: 1) …
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Integrable and Integrated Optoelectronic Devices Grown by Metalorganic Chemical Vapor Deposition
… describes several integrable and integrated optoelectronic devices grown by metalorganic chemical vapor deposition (MOCVD) crystal growth. The emphasis is on device design and fabrication using crystal growth techniques to minimize post-growth processing and add design flexibility.
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Quantum dot polymer composite materials for light management in optoelectronic devices
… a path to achieve high conversion efficiency of optoelectronic devices, including photovoltaic concentrators and LED display modules. Semiconductor nanocrystals, also known as quantum dots (QDs), serve as the pivotal luminescent materials in these devices. A quantum dots encapsulation method was …
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Understanding and optimizing perovskite optoelectronic devices with multi-dimensional imaging techniques
… in understanding and optimizing perovskite-based optoelectronics. Chapters 1 and 2 give the motivation behind this work and background to perovskite optoelectronics and machine learning. Chapter 3 introduces the main experimental techniques. The debated passivation strategies on perovskite solar …
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Large-scale integration of graphene optoelectronic devices in photonic integrated circuits
… for its extremely high mobility and novel optoelectronic properties. In this thesis, we argue in favor of integrating graphene as an active optoelectronic material alongside optical waveguides on the back-end of CMOS ICs for photonic links in access network and computing applications. We …
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