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https://olympias.lib.uoi.gr/jspui/handle/123456789/38253Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Μασκανάκη, Αικατερίνη | el |
| dc.contributor.author | Maskanaki, Aikaterini | en |
| dc.date.accessioned | 2024-07-30T06:33:18Z | - |
| dc.date.available | 2024-07-30T06:33:18Z | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/38253 | - |
| dc.rights | Attribution-NonCommercial-NoDerivs 3.0 United States | * |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/us/ | * |
| dc.subject | Organic Light Emitting Diodes | en |
| dc.subject | Electrical Characterization | en |
| dc.subject | Semiconductor Physics | en |
| dc.subject | Οργανικές Δίοδοι Εκπομπής Φωτός | el |
| dc.subject | Ηλεκτρικός Χαρακτηρισμός | el |
| dc.subject | Φυσική Ημιαγωγών | el |
| dc.title | Electrical and Optical Characterization of Organic LEDs with Different Electron Emission Layers | en |
| dc.title | Ηλεκτρικός και Οπτικός Χαρακτηρισμός Οργανικών Διόδων Εκπομπής Φωτός με Διαφορετικά Στρώματα Εκπομπής Ηλεκτρονίων | el |
| dc.type | doctoralThesis | en |
| heal.type | masterThesis | el |
| heal.type.en | Master thesis | en |
| heal.type.el | Μεταπτυχιακή εργασία | el |
| heal.classification | Solid State Physics | |
| heal.classification | Φυσική Στερεάς Κατάστασης | |
| heal.dateAvailable | 2024-07-30T06:34:18Z | - |
| heal.language | en | el |
| heal.access | free | el |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών | el |
| heal.publicationDate | 2024-07 | - |
| heal.abstract | Organic Light Emitting Diodes (OLEDs) consist of one or more organic layers, polymer or not, which are placed between two electrodes; the anode (usually glass with a thin layer of Indium Tin Oxide, ITO, on top) and the cathode (a metal with low work function, e.g. aluminum). After applying voltage on the electrodes, electrons and holes are injected in the organic layer, and when they get close enough, they form an excited state, the exciton. The exciton’s annihilation results in photon emission whose wavelength depends on the energy bandgap of the emissive layer (polymer, small organic molecule or transition metal complex). Choosing the right organic materials and constructing the diode properly are of highest importance in order to create high performance OLEDs. Organic light emitting diodes (OLEDs) are attractive for display applications because of their high brightness, low driving voltage and tunable color. As a result, they are commonly used as a promising technology for solid state lighting and flat panel displays. However, the efficiency and stability of those OLEDs depend on many factors, such as the properties of the used materials and their interfaces with the electrodes. In order to improve the performance of OLEDs it is vital to incorporate carrier transporting interlayers thus reducing the charge energy barrier at the selected electrode/organic emissive layer. Luminance is severely affected by operation time, as it degrades for reasons yet to be completely understood. An occurring explanation would be that electrical aged OLEDs have generated deep interface states and as a result the interfaces need more time to charge. The aim of the present work is to study the electrical characteristics of OLEDs with different materials used as an Electron Transport Layer (ETL) and the effects of deep electron traps. Characteristic curves were obtained simultaneously on fresh or electrically stressed devices to investigate both the current conduction mechanisms as well as the evolution of deep electron traps that affect the turn on voltage and the overall quality of the tested OLEDs. Results show that incorporating an ETL improves the device characteristics and eliminates the generated electron traps. | en |
| heal.advisorName | Evangelou, Evangelos | en |
| heal.committeeMemberName | Evangelou, Evangelos | en |
| heal.committeeMemberName | Evangelakis, Georgios | en |
| heal.committeeMemberName | Avgeropoulos, Apostolos | en |
| heal.academicPublisher | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Φυσικής | el |
| heal.academicPublisherID | uoi | el |
| heal.numberOfPages | 121 p. | el |
| heal.fullTextAvailability | true | - |
| heal.fullTextAvailability | true | - |
| Appears in Collections: | Διδακτορικές Διατριβές - ΦΥΣ | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Μ.Ε. Μασκανάκη Αικατερίνη (2024).pdf | 6.66 MB | Adobe PDF | View/Open |
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