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 5 of 5 for “"bandgap states"”.
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Toward efficient and stable quantum dot solar cells : design and characterization
… the solution-processability and a tunable energy bandgap that covers the optimal bandgap range for single and multi-junction solar cells. However, despite rapid progress, previous QD solar cells still show unsatisfactory efficiency and stability. In this thesis work, room-temperature …
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Understanding and Controlling the Optoelectronic Properties of Cs2AgBiBr6 Double Perovskite
… on device performance, 2) lowering the bandgap through alloying with Sb3+, and 3) understanding the potential and limitations of bismuth-antimony double perovskite alloys for photovoltaic applications. For the first area, I show through cathodoluminescence measurements that grain …
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Reduction of Electronic Traps in Organic Semiconductors by Novel Processing Methods
In a field dominated by inorganic semiconductors, carbon-based materials are emerging as possible replacements for devices where a moderate performance is acceptable, with many desirable traits that make them better suited in certain applications. Specifically, many organic semiconductors can be …
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Understanding defects in germanium and silicon for optoelectronic energy conversion
… focus on understanding the impact defect related bandgap states will have on optoelectronic applications. Optoelectronic devices are minority carrier devices and are particularly sensitive to defect states which can drastically reduce carrier lifetimes in small concentrations. We performed a study …
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Surface trap passivation and characterization of lead sulfide quantum dots for optical and electrical applications
… of QD thin film devices is sub-band-gap states, also referred to as trap states. For instance, trap states impair optical properties and device performance by providing alternative pathways for exciton quenching and carrier recombination. Chemical modification of QDs has been commonly …