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Metal Oxide Nanostructure Based Ultr...

Sharma, Prachi.

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Metal Oxide Nanostructure Based Ultraviolet Photodetectors for Smart Lighting Applications.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Metal Oxide Nanostructure Based Ultraviolet Photodetectors for Smart Lighting Applications./
作者:	Sharma, Prachi.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	123 p.
附註:	Source: Dissertation Abstracts International, Volume: 79-12(E), Section: B.
Contained By:	Dissertation Abstracts International79-12B(E).
標題:	Electrical engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10790616
ISBN:	9780438206854

Metal Oxide Nanostructure Based Ultraviolet Photodetectors for Smart Lighting Applications.
Sharma, Prachi.

Metal Oxide Nanostructure Based Ultraviolet Photodetectors for Smart Lighting Applications. - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 123 p.

Source: Dissertation Abstracts International, Volume: 79-12(E), Section: B.

Thesis (Ph.D.)--Rensselaer Polytechnic Institute, 2018.

Ultraviolet (UV) photodetectors are used in a wide range of applications including safety applications such as electric arc and flame detection, strategic applications for detecting missile plumes, for instrumentation in space applications, for environmental applications such as water or air quality monitoring, and for defense applications to detect chemical or biological threats. Existing commercial UV photodetectors provide poor performance with peak responsivity in the ultraviolet range of less than 0.2 A/W.

ISBN: 9780438206854Subjects--Topical Terms:

649834
Electrical engineering.

Metal Oxide Nanostructure Based Ultraviolet Photodetectors for Smart Lighting Applications.
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245 1 0 $a Metal Oxide Nanostructure Based Ultraviolet Photodetectors for Smart Lighting Applications.
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500 $a Source: Dissertation Abstracts International, Volume: 79-12(E), Section: B.
500 $a Adviser: Shayla Sawyer.
502 $a Thesis (Ph.D.)--Rensselaer Polytechnic Institute, 2018.
520 $a Ultraviolet (UV) photodetectors are used in a wide range of applications including safety applications such as electric arc and flame detection, strategic applications for detecting missile plumes, for instrumentation in space applications, for environmental applications such as water or air quality monitoring, and for defense applications to detect chemical or biological threats. Existing commercial UV photodetectors provide poor performance with peak responsivity in the ultraviolet range of less than 0.2 A/W.
520 $a In this thesis, we have developed visible blind UV photodetectors with high responsivity. The application of focus in this work is UV photodetectors for biohazard detection in living spaces. The intrinsic fluorescence at 340 nm from microbes is exploited to detect microbes in the presence of ambient light. High performance UV photodetectors based on metal oxide nanostructures are designed and fabricated. Three metal oxides: tin oxide, zinc oxide and gallium oxide are explored for the fabrication of high performance UV photodetectors.
520 $a Performance enhancement of the photodetectors is achieved by using functionalized multi-walled carbon nanotubes for better charge carrier collection efficiency and faster charge transport. The impact of the thickness of carbon nanotube network on the dark and photo current of the photodetectors is studied. Surface passivation using two polymers: PVA and PVP, is proposed to suppress the parasitic luminescence caused by defects in the metal oxides. Surface passivation is shown to improve the responsivity of the photodetector by a factor of hundred. The polymer properties that dictate the performance enhancement of photodetectors are evaluated. Hollow nanospherical structures are explored to further improve the responsivity. Template free synthesis method for tin oxide hollow nanospheres using Ostwald ripening process is presented. The responsivity of the photodetector fabricated with tin oxide hollow nanospheres shows nine hundred times improvement compared to the nanoparticle-based detector. Whispering gallery mode resonance phenomenon is discussed to explain high responsivity of photodetectors fabricated using hollow nanospheres.
520 $a A modular polystyrene spheres-based template assisted solvothermal method is also presented for the synthesis of zinc oxide and beta gallium oxide hollow nanospheres. Template-based method allows higher tunability of the hollow sphere morphology. These materials are suitable for fabrication of UV-A and UV-C photodetectors.
590 $a School code: 0185.
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