dc.contributor.advisor | Lindgren, Mikael | |
dc.contributor.advisor | Haarberg, Geir | |
dc.contributor.author | Bjelland, Victoria Madeleine | |
dc.date.accessioned | 2021-10-16T17:22:27Z | |
dc.date.available | 2021-10-16T17:22:27Z | |
dc.date.issued | 2021 | |
dc.identifier | no.ntnu:inspera:80800066:30125358 | |
dc.identifier.uri | https://hdl.handle.net/11250/2823508 | |
dc.description | Full text not available | |
dc.description.abstract | Elektrokjemiske eksperimenter som syklisk voltammetri og elektrokjemisk impedans spektroskopi var utført
for å finne den høyeste opptatte molekylære orbitalen (HOMO) og den lavest uokkuperte molekylære
(LUMO) orbitalen for organiske molekyler. Det ble utført i 99.8% ren N,N-Dimethylformamide (DMF)
som løsemiddel med ≥98% 0.1M tetrabutylammonium perchlorate (TBA) som elektrolytt. N,N-Di(1-
naphthyl)-N,Ndiphenyl-(1,1-biphenyl)-4,4-diamine (NPD) hadde et målt HOMO nivå på -5.44eV og et
LUMO nivå på -2.23eV. Tris(2-phenylpyridine)iridium(III) (Ir(ppy)3) hadde et målt HOMO nivå på -
5.38eV. Ferrocene (Fc), som oksiderer på -5.05eV, ble brukt som referanse.
Molekylene Platinum octaethylporphyrin (PtOEP), 2,3,7,8,12,13,17,18-Octaethyl-21H,23H-porphine
palladium(II) (PdOEP), 9,10-Diphenylanthracene (DPA) og Rubrene ble foto-kinetisk analysert. Det spektrale og kinetiske egenskapene til triplett-triplett annihilasjon (TTA) var målt med donator/akseptor parene
PtOEP-DPA og PdOEP-Rubrene. Transient absorbsjon og transient emisjon ble spesifikt brukt for å lokalisere triplett absorbsjonen og finne den korresponderende forsinkede fluorescensen. En kinetisk model for
systemet ble foreslått og simulert. | |
dc.description.abstract | Electrochemical experiments such as cyclic voltammetry and electrochemical impedance spectroscopy
were used to determine the highest occupied molecular orbital (HOMO) and lowest unoccupied molecluar
orbital (LUMO) levels of organic molecules. They were conducted in 99.8% pure N,N-Dimethylformamide
(DMF) as solvent with ≥ 98% 0.1M tetrabutylammonium perchlorate (TBA) as supporting electrolyte. N,NDi(1-naphthyl)-N,Ndiphenyl-(1,1-biphenyl)-4,4-diamine (NPD) had a measured HOMO level of -5.44eV
and a LUMO level of -2.23eV. Tris(2-phenylpyridine)iridium(III) (Ir(ppy)3) had a measured HOMO level
of -5.38 eV. Ferrocene (Fc), which oxidizes at -5.05eV, was used as reference.
The molecules Platinum octaethylporphyrin (PtOEP), 2,3,7,8,12,13,17,18-Octaethyl-21H,23H-porphine
palladium(II) (PdOEP), 9,10-Diphenylanthracene (DPA) and Rubrene were under photo-kinetic investigation. The spectral and kinetic features of triplet-triplet annihilation were measured from the donor-acceptor
pairs PtOEP-DPA and PdOEP-Rubrene. Specifically, transient absorption spectroscopy and transient emission spectroscopy were used to locate the triplet absorption bands and correlate their appearance in time
with the delayed fluorescence. A kinetic model of the system was suggested and simulated of the donor/acceptor pairs and their energy transfers giving rise to the delayed fluorescence. | |
dc.language | eng | |
dc.publisher | NTNU | |
dc.title | Electrochemical and Photo-Physical Investigations of Organic Light Emitting Diode Materials | |
dc.type | Master thesis | |