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Development of uncooled infrared detector based on lead selenide

dc.contributor.advisorSrdić, Vladimir
dc.contributor.otherCvejić, Željka
dc.contributor.otherSrdić, Vladimir
dc.contributor.otherMilanović, Marija
dc.contributor.otherStijepović, Ivan
dc.contributor.otherBajac, Branimir
dc.creatorStanojev, Jovana
dc.date.accessioned2021-03-18T09:47:44Z
dc.date.available2021-03-18T09:47:44Z
dc.date.issued2020-12-25
dc.identifier.urihttps://www.cris.uns.ac.rs/DownloadFileServlet/Disertacija16031089592821.pdf?controlNumber=(BISIS)115432&fileName=16031089592821.pdf&id=16965&source=NaRDuS&language=srsr
dc.identifier.urihttps://www.cris.uns.ac.rs/record.jsf?recordId=115432&source=NaRDuS&language=srsr
dc.identifier.urihttps://www.cris.uns.ac.rs/DownloadFileServlet/IzvestajKomisije16031089737361.pdf?controlNumber=(BISIS)115432&fileName=16031089737361.pdf&id=16966&source=NaRDuS&language=srsr
dc.identifier.uri/DownloadFileServlet/IzvestajKomisije16031089737361.pdf?controlNumber=(BISIS)115432&fileName=16031089737361.pdf&id=16966
dc.identifier.urihttps://nardus.mpn.gov.rs/handle/123456789/18113
dc.description.abstractRazvoj infracrvenih detektora je bitan zbog primene u vojnoj industriji (detekcija letelica i laserskog zračenja), kao i kod molekularne spektroskopije, analize gasova, detekcije eksploziva, pesticida, analize hrane, analize lekova itd. Halkogenidi olova, u čiju grupu spada i olovo selenid (PbSe), predstavljaju poluprovodnike IV-VI grupe sa uskom energijom zabranjene zone, koja za PbSe iznosi 0,27 eV na sobnoj temperaturi, što odgovara talasnoj dužini 4,8 μm. Zbog navedenog, ali i drugih posebno3sti (visoka detektivnost na sobnoj temperaturi, relativno jednostavna tehnologija izrade itd), olovo selenid je jedan od dominantnih materijala za razvoj nehlađenog infracrvenog detektora, koji radi u srednjoj oblasti infracrvenog zračenja od 1 do 5 μm. U tehnologiji izrade detektora danas preovlađuju strukture polikristalnih filmova. Metode za izradu polikristalnih filmova na bazi olovo selenida su termičko naparavanje i hemijska depozicija. Nezavisno od procesa dobijanja, film PbSe mora da se termički tretira u kontrolisanoj atmosferi kiseonika ili kiseonika i halogena da bi postao osetljiv na infracrveno zračenje. Dakle, performanse detektora su usko povezane sa parametrima sinteze i termičkog procesiranja kao što su: veličina kristalita, morfologija, fazni sastav, temperatura i atmosfera termičkog tretmana itd. Komercijalno dostupni infracrveni detektori na bazi olovo selenida su uglavnom fotoprovodni infracrveni detektori. Cilj ove doktorske disertacije je zapravo razvoj fotonaponskog infracrvenog detektora na bazi olovo selenida, koji poseduje p-n homospoj. Upotrebom impulsnog izvora svetlosti, kao što su laser ili ksenonska lampa, dolazi do formiranja temperaturnog gradijenta duž poprečnog preseka polikristalnog filma olovo selenida, gde se na površini dostiže temperatura potrebna za senzitizaciju i difuziju kiseonika, dok površina koja je vezana za supstrat ostaje na sobnoj temperaturi. Paralelno su procesirani fotoprovodni i fotonaponski detektori na bazi olovo selenida. Strukturna, morfološka i električna karakterizacija su vršene u cilju poređenja različitih procesa senzitizacije. Predložena nova struktura je „sendvič“ struktura sa olovo selenidnim aktivnim filmom između kolektorskih elektroda. Ovakva lateralna struktura ima potencijal da bude bolji izbor od standardno koiršćene podužne strukture, koja se koristi u fotoprovodnim infracrvenim detektorima. Drugi deo ove doktorske disertacije je bio fokusiran na razvoj elektrode na bazi višeslojnih ugljeničnih nanocevi, koja je transparentna u srednjem IC opsegu. Jednostavnom i ekonomski isplativom tehnikom sloj-po-sloj su precesirani tanki filmovi višeslojnih ugljeničnih nanocevi i polietilen imina. Ispitivan je uticaj debljine filmova na transparentnost u srednjem infracrvenom opsegu i na otpornost. Dobijeni su filmovi transparentnosti oko 70% u srednjem infracrvenom opsegu. Naredni korak će biti nanošenje transparentnih elektroda na filmove olovo selenida u kojima je formiran p-n spoj duž poprečnog preseka. Finalno će svi uzorci biti podvrgnuti strukturnoj i funkcionalnoj karakterizaciji.sr
dc.description.abstractDevelopment of the infrared detectors is essential for millitary purposes (aircraft detection and laser detection), as well as for molecular spectroscopy, gas analysis, explosive detection, pesticide detection, food and drugs analysis etc. Lead chalcogenides, such as lead selenide (PbSe), are in the group of IV-VI semiconductors with narrow bandgap, that is 0,27 eV for PbSe at room temperature, which corresponds to wavelength 4,8 μm. Considering everything mentioned above and some other features (high detectivity at room temperature, easy processing technology etc.), lead selenide is one of the dominant materials for development of uncooled infrared detectors, operating in the mid-infrared range from 1 to 5 μm. In the detector manufacturing technology prevail structures such as polycrystalline films. Methods for synthesis of polycrystalline films based on lead selenide are thermal evaporation and chemical deposition. After the synthesis, PbSe film needs to be thermally treated in controlled oxygen atmosphere or mixture of oxygen and chalogen in order to become infrared sensitive. Therefore, detector performances are tightly connected with synthesis parameters and thermal processing such as: grain size, morphology, phase composition, temperature and atmosphere of the thermal treatment etc. Commercially available lead selenide based infrared detectors are usually photoconductive infrared detectors. The goal of this PhD thesis is actually the development of the photovoltaic infrared detector based on lead selenide, that has p-n homojunction. Using pulsed source of the electromagnetic radiation, such as laser or xenon lamp, thermal gradient will form across the cross section of the polycrystalline lead selenide film, where surface reaches the temperature necessary for the thermal treatment and oxygen difusion, while the surface connected to the substrates remains at the room temperature. In this thesis in paralell were developed both photoconductive and photovoltaic detectors based on lead selenide. Structural, morphological and electrical characterization were used for comparison of different processing techniques. New proposed “sandwich” structure consists of lead selenide film in the middle of collector electrodes. This lateral structure has a potential to be a better choice in comparison to longitudinal structure, used for photoconductive infrared detectors. Second part of this PhD thesis was focused on development of the electrode based on multiwalled carbon nanotubes, transparent in the mid-infrared range. Layer-by-layer technique that is simple and low-cost was used for processing of the thin films based on multiwalled carbon nanotubes and polyethileneimine. Influence of the film thickness on the transparency in the midinfrared range and sheet resistance was examined. Processed films had 70% transparency in the mid-infrared range. Next step will be deposition of the transparent electrode onto the lead selenide films made with p-n homojunction. Finally, all samples will be characterized for their structural and functional properties.en
dc.languagesr (latin script)
dc.publisherУниверзитет у Новом Саду, Технолошки факултетsr
dc.rightsopenAccessen
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourceУниверзитет у Новом Садуsr
dc.subjectolovo selenidsr
dc.subjectLead selenideen
dc.subjectinfracrveni detektorisr
dc.subjectpoluprovodnik p-n tipasr
dc.subjectvišeslojne ugljenične nanocevisr
dc.subjecttehnika sloj-po-slojsr
dc.subjectinfrared detectorsen
dc.subjectsemiconductor p-n typeen
dc.subjectmultilayered carbon nanotubesen
dc.subjectlayer-by-layer techniqueen
dc.titleRazvoj nehlađenog infracrvenog detektora na bazi olovo selenidasr
dc.title.alternativeDevelopment of uncooled infrared detector based on lead selenideen
dc.typeDoktorska disertacijasr
dc.rights.licenseBY-NC-ND
dc.identifier.fulltexthttp://nardus.mpn.gov.rs/bitstream/id/70092/IzvestajKomisije.pdf
dc.identifier.fulltexthttp://nardus.mpn.gov.rs/bitstream/id/70091/Disertacija.pdf
dc.identifier.rcubhttps://hdl.handle.net/21.15107/rcub_nardus_18113


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