Polymer Photodetectors: Device Structure, Interlayer and Physics

Polymer Photodetectors: Device Structure, Interlayer and Physics

Bibliographic Details
Main Author: Liu, Xilan
Language:English
Published: University of Akron / OhioLINK 2013
Subjects:
Polymers
Materials Science
Electrical Engineering
polymer photovoltaics
polymer photodetectors
bulk heterojunction
high responsivity
detectivity
inverted device structure
interfacial layers
ZnO nanowire
CdTe quantum dot
device physics
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=akron1384334220
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-akron13843342202021-08-03T06:20:21Z Polymer Photodetectors: Device Structure, Interlayer and Physics Liu, Xilan Polymers Materials Science Electrical Engineering polymer photovoltaics polymer photodetectors bulk heterojunction high responsivity detectivity inverted device structure interfacial layers ZnO nanowire CdTe quantum dot device physics Photodetectors are light responsive devices that convert optical signals into electric signals. Photodetectors have wide applications in image sensing, environmental monitoring, day- and night-surveillance, chemical and biological detection, industrial process control, communication, planetary probing and so on. Currently, photodetectors based on GaN, ZnO, Si, InGaAs and bulk PbS cover different sub-bands from UV to infrared region. These photodetectors are expensive and some of them require to be operated at low temperature, which certainly limits their applications. Polymer photodetectors made with conjugated polymers possess the unique features, including room-temperature operation, high sensitivity, low working voltage, low cost, thin profile, large area and flexibility. Ultrasensitive polymer photodetectors with high response speed and spectral response ranging from UV to near infrared have been demonstrated. However, new device structure, high responsivity and stable polymer photodetectors needs to be developed. In my dissertation, we reported various methods to enhance the performance of polymer photodetectors. By solvent annealing and post-production thermal annealing, we were able to demonstrate that polymer photodetectors possess comparable responsivity to inorganic counterparts. We have, for the first time, developed the inverted device structure for polymer photodetectors. By utilizing inorganic nanowires and quantum dots as either cathode or anode buffer layer, we were able to demonstrate robust polymer photodetectors. We also investigate the device performance versus energy offset between the workfunction of anode electrode and the valance band of conjugated polymers, band offset at the heterojunction and purity of conjugated polymers. 2013 English text University of Akron / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=akron1384334220 http://rave.ohiolink.edu/etdc/view?acc_num=akron1384334220 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Polymers
Materials Science
Electrical Engineering
polymer photovoltaics
polymer photodetectors
bulk heterojunction
high responsivity
detectivity
inverted device structure
interfacial layers
ZnO nanowire
CdTe quantum dot
device physics
spellingShingle Polymers
Materials Science
Electrical Engineering
polymer photovoltaics
polymer photodetectors
bulk heterojunction
high responsivity
detectivity
inverted device structure
interfacial layers
ZnO nanowire
CdTe quantum dot
device physics
Liu, Xilan
Polymer Photodetectors: Device Structure, Interlayer and Physics
author Liu, Xilan
author_facet Liu, Xilan
author_sort Liu, Xilan
title Polymer Photodetectors: Device Structure, Interlayer and Physics
title_short Polymer Photodetectors: Device Structure, Interlayer and Physics
title_full Polymer Photodetectors: Device Structure, Interlayer and Physics
title_fullStr Polymer Photodetectors: Device Structure, Interlayer and Physics
title_full_unstemmed Polymer Photodetectors: Device Structure, Interlayer and Physics
title_sort polymer photodetectors: device structure, interlayer and physics
publisher University of Akron / OhioLINK
publishDate 2013
url http://rave.ohiolink.edu/etdc/view?acc_num=akron1384334220
work_keys_str_mv AT liuxilan polymerphotodetectorsdevicestructureinterlayerandphysics
_version_ 1719434854832013312

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