Dissertations / Theses on the topic 'Life time of charge carrier'
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Golda, Martin. "Polovodičové struktury, metoda nábojového sběru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220953.
Full textФедоров, Антон Олександрович. "Час життя в пористих структурах з нанокристалами металів." Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2019. https://ela.kpi.ua/handle/123456789/28877.
Full textThe total amount of work is 72 pages, number of illustrations - 32, tables - 2, bibliographic titles - 18. The lifetime of carriers of unbalanced charge carriers is an important parameter for semiconductor devices and devices. It is generally believed that the presence of metals in silicon leads to a deterioration of the bulk properties of the semiconductor. In the last three decades, such material has become popular as porous silicon, one of the methods of obtaining which is chemical etching in the presence of metals. The purpose of this work is to study the lifetime of unbalanced charge carriers in porous silicon made by the method of chemical etching in the presence of metals. Important factors are the presence of various metals during etching. To conduct the study, you must do the following: • To conduct a review of the literature and get acquainted with the features of porous silicon and methods of its manufacture. • To produce a sufficient number of different samples of porous silicon • Take measurements of life time • Make conclusions about the information obtained during the study The objects of the study are samples of porous silicon containing one or another amount of metallic substances. The following research methods were developed in the work: • Obtaining a realxication characteristic of charge carriers by a method of modulation in point contact. Measuring the resistance of the samples • Studying the morphology of sensor samples using raster electron microscopy. The scientific novelty consists in studying the parameters of porous silicon, etched precisely with help of metal chemical assisting etching with Ag, Au, and Cu, with the subsequent removal of metallic nanoparticles in some cases.
Karlsen, Peter. "Terahertz spectroscopy of charge-carrier dynamics in one-dimensional nanomaterials." Thesis, University of Exeter, 2018. http://hdl.handle.net/10871/33086.
Full textKampfrath, Tobias. "Charge carrier dynamics in solids and gases observed by time resolved terahertz spectroscopy." [S.l.] : [s.n.], 2005. http://www.diss.fu-berlin.de/2006/250/index.html.
Full textAytac, Yigit. "Time-resolved measurements of charge carrier dynamics in Mwir to Lwir InAs/InAsSb superlattices." Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/2039.
Full textOlson, Benjamin Varberg. "Time-resolved measurements of charge carrier dynamics and optical nonlinearities in narrow-bandgap semiconductors." Diss., University of Iowa, 2013. https://ir.uiowa.edu/etd/2596.
Full textHérissan, Alexandre. "Étude par Time Resolved Microwave Conductivity de photocatalyseurs pour la dépollution de l’eau." Thesis, Université Paris-Saclay (ComUE), 2015. http://www.theses.fr/2015SACLS097/document.
Full textThe photocatalysis is based on the excitation of semiconductor by photons with an energy superior or equal to the gap, generating electron-hole pairs. These are very reactive and able to react at the interface, involving for exemple the total oxidation of an organic compound. This method can be used on wastewater to eliminate the organic pollutants. With a view to use the sun as a light source this method may become an economical and ecological way for the water treatment. Light interaction between light and semiconductor and the charge-carrier dynamics are fundamental processes for photocatalysis and it is necessary to understand them in order to manage with this process and develop more efficient materials. The Time Resolved Microwave Conductivity (TRMC) is a method based on the reflexion of microwaves on an excited semiconductor which is linked to the number of photo-generated charge-carriers. This method allows us to probe in real time the charge-carrier dynamics in semiconductor. This work is included in the ANR Photonorm project. It consists in a TRMC study on titanium dioxyde TiO2 used for water depollution by photocatalysis. One part of this study consists in the characterization of the opto-electronic properties of materials for which the charge-carrier dynamics will be compared with the photocatalytic activity. The beneficial effect of nanoparticles deposition of gold, silver or gold-copper bimetallics on commercial TiO2 will be linked to the observation of free electrons observed by TRMC . The beneficial effect on photocatalysis in visible light was linked to an electron injection in TiO2 by bismuth nanoparticles. The second part of this work consists in a more fundamental study of charge-carrier dynamics on commercial or synthetized for the Photonorm project. I will be shown the importance of excitation wavelength and intensities on charge carrier generation. The importance of surface effect and environment will be emphasized by several ways. The first one just consist in surface treatment which can have a major importance on charge-carrier dynamics and photocatalysis, probably in connection with the presence or not of impurities on the surface. The second way consists in impregnating TiO2 by organic dyes which show a strong visible light absorption. The TRMC measurements highlight the interaction between the adsorbed molecules and the semiconducteur, including the electron injection from the excited dye to the TiO2 but also an increased recombination effect. The third method consist in modified the working atmosphere in TRMC. The major role of oxygen is so observed on charge-carrier dynamics, with an effect of electron capture, involving in photocatalytic mechanism.Finally TRMC proves to be a convenient method for studying charge-carrier dynamics in semiconductors, which allow a better understanding of fundamental processes bound to photocatalysis
Jansen, Hendrik [Verfasser]. "Chemical Vapour Deposition Diamond : Charge Carrier Movement at Low Temperatures and Use in Time-Critical Applications / Hendrik Jansen." Bonn : Universitäts- und Landesbibliothek Bonn, 2015. http://d-nb.info/1077289219/34.
Full textRoland, Paul Joseph. "Charge Carrier Processes in Photovoltaic Materials and Devices: Lead Sulfide Quantum Dots and Cadmium Telluride." University of Toledo / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1449857685.
Full textJansen, Hendrik [Verfasser]. "Chemical Vapour Deposition Diamond : Charge Carrier Movement at Low Temperatures and Use in Time-Critical Applications [[Elektronische Ressource]] / Hendrik Jansen." Bonn : Universitäts- und Landesbibliothek Bonn, 2014. http://d-nb.info/1047145537/34.
Full textCadirci, Musa. "Ultrafast charge dynamics in novel colloidal quantum dots." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/ultrafast-charge-dynamics-in-novel-colloidal-quantum-dots(865aba90-9d60-478d-8f49-ad4785516688).html.
Full textKokil, Akshay. "Conjugated Polymer Networks: Synthesis and Properties." online version, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=case1121451946.
Full textMajdi, Saman. "Experimental Studies of Charge Transport in Single Crystal Diamond Devices." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-173599.
Full textGabrysch, Markus. "Charge Transport in Single-crystalline CVD Diamond." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-122794.
Full textVenkatapathi, Sarankumar. "Temperature effects on the electronic properties of lead telluride (PbTe) and the influence of nano-size precipitates on the performance of thermoelectric materials. (SrTe precipitates in PbTe bulk material)." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/51947.
Full textMaster of Science
Villamil, Franco Carolina. "Ultrafast dynamics of excitons and charge carriers in colloidal perovskite nanostructures studied by time-resolved optical spectroscopies." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASF012.
Full textHalide perovskites have emerged as very promising photoactive materials due to their outstanding optoelectronic properties combined with low-cost processability. In spite of their successful implementation in photovoltaic or light-emitting devices, a deep understanding of the dynamics of relaxation and recombination is still missing in order to enhance the device performances. This thesis focuses on the study of two major fundamental processes occurring in colloidal halide perovskite nanostructures: the hot charge carrier/exciton relaxation (“cooling”), after excitation above the optical bandgap, and the non-radiative Auger recombination, taking place after high-fluence or high-photon energy excitation. In particular, time-resolved photoluminescence and femtosecond transient absorption spectroscopy were used to investigate the confinement and composition effects in strongly confined two-dimensional (2D) lead iodide perovskite nanoplatelets (NPLs), that were synthesized following the development and optimizations of colloidal methods. For the investigation of the cooling dynamics, a global analysis method based on single value decomposition was used, where the temporal evolution of the spectral lineshapes was modeled with a sequential kinetic scheme. This method was succesfully applied to effectively describe the continuous energy relaxation in weakly-confined thick FAPbI₃ nanoplates (FA=formamidinium) and allowed disantangleting the hot phonon bottleneck from the Auger reheating effects at high excitation fluence. Furthermore, the global analysis was essential to investigate the cooling dynamics in strongly confined 2D NPLs presenting large Stark effects and discrete excitonic band-edge transition far away from the continuum of states (exciton binding energy in several hundreds of meV). As in the weakly confined samples, the cooling rate of the NPLs decreases with the excitation fluence. However, it is faster in more-strongly confined samples, evidencing the absence of an intrinsic phonon bottleneck. Furthermore, the cooling rate and its evolution with the exciton density were found independent of the nature of the internal cations (FA, MA=methylammonium and Cs=cesium). However, when comparing with the rate measured in 2D layered perovskite thin film with equivalent quantum well thickness, the results strongly suggest a role of the surface ligands in the possibility to release the excess energy to the surrounding environment. This ligand-mediated relaxation mechanism becomes dominent in the thinner NPL samples with enhanced exciton/ligand vibrational mode coupling. Then, the multiple exciton recombination dominated by non-radiative Auger recombination (AR) was studied in the strongly-confined 2D perovskite NPLs. Due to the large asymmetric geometry and the limited exciton wavefunction delocalization, the AR rate strongly depends on the exciton density via the initial average inter-exciton distance. At low fluence, this distance is in several tens of nanometers such as the AR is limited by the exciton diffusion in the 2D plane. It thus occurs on a timescale of several hundreds of picoseconds and depends on the sample dimensionality (thickness and lateral sizes). In contrast, high excitation fluences produce “overlapping” excitons with inter-exciton distances of only a few times the exciton Bohr radius, resulting in AR times of less than 10 ps and independent of the NPL composition nor geometry. Finally, the exciton population dynamics of 2D NPLs after excitation in the ultraviolet was measured. The strong dependence of the AR with the inter-exciton distance allows the identification of multiple exciton generation (MEG), which involves the reaction of “geminate biexcitons” produced by the absorption of a single high-energy photon
Baev, Alexander. "Multi-Photon Interactions with a Time Structure." Doctoral thesis, KTH, Biotechnology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3515.
Full textThe present thesis concerns aspects of the interaction ofmatter in gas, liquid and solid phases, with electromagneticradiation, ranging from the optical to the X-ray region. Overthe last decade the availability of ultrashort strong laserpulses as well as of high power synchrotron sources of tunableX-ray radiation has stimulated a rapid development of newexperimental techniques which makes it possible to analysedifferent physical, chemical and biological processes inunprecedented detail. All of this urges a concomitantdevelopment of adequate theoretical language and methodscombined with simulation techniques.
The first part of the thesis addresses nonlinear propagationof strong optical pulses. This study is motivated by thebreakthrough in synthesis of novel organic materials possessingprespecified nonlinear optical properties and which has led toa multitude of potential applications such as, for example, 3Dimaging and data storage, optical limiting and photodynamiccancer therapy. In order to clarify the underlying physics, astrict solution has been derived of the density matrixequations of a material aiming at an explicit treatment of itsnonlinear polarization without addressing a conventional Taylorexpansion over field amplitudes. Such a formalism is developedfor many-level molecules, allowing to solve the coupledMaxwell's and density matrix equations for the propagation of afew interacting laser pulses through a nonlinear molecularmedium. The theory presented is capable to account formulti-photon processes of an arbitrary order and for differentsaturation effects. The theory is applied to simulations oftwo- and three-photon absorption as well as to upconvertedstimulated emission of organic molecules in solvents.
The second part of the thesis is devoted to resonant X-rayRaman scattering from free molecules, solutions and polymerfilms. The temporal analysis of the spectral profiles isperformed using the technique of scattering duration whichallows to select physical processes with different time scales.The slowing-down/speeding-up of the scattering by frequencydetuning provides insight in the formation of the differentparts of the scattering profile like atomic and molecularbands, resonant and vertical scattering channels, anomalousenhancement of the Stokes doubling effect. The lifetimevibrational interference (LVI), playing a crucial role inresonant scattering, is found to strongly influence thedispersion of the Auger resonances of polymers in agreementwith experiment. An almost complete quenching of the scatteringcross section by LVI is observed for the N2molecule. It is found that the interferenceelimination of the scattering amplitude gives valuableinformation on molecular geometry. The electron Doppler effectis minutely studied making use of a wave packet technique. Thesimulations show an "interference burning" of a narrow hole onthe top of the Doppler broadened profile of the Auger spectraof molecular oxygen. For the SF6molecule the Auger Doppler effect is found to besensitive to the detuning due to the scattering anisotropy. Inall of these studies the temporal language was foundconstructive and enormously helpful for understanding theunderlying physical processes. Most theoretical predictionsmade have been verified by experiments.
Shi, Yaocheng. "Design, Simulation and Characterization of Some Planar Lightwave Circuits." Doctoral thesis, Kista : KTH School of Information and Communication Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4760.
Full textNaureen, Shagufta. "Top-down Fabrication Technologies for High Quality III-V Nanostructures." Doctoral thesis, KTH, Halvledarmaterial, HMA, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-117766.
Full textQC 20130205
Wang, Chien-Jui, and 王千瑞. "Investigation of charge carrier property with time of flight measurement." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/64766096074771554614.
Full text國立中山大學
光電工程學系研究所
100
In this thesis, we investigated charge carrier properties of two series of organic semiconductors with time of flight measurement. Charge carrier mobility is calculated in different electron filed and fitted to Poole-Frenkel model. In the first part, we investigated carrier properties of pyrrole derivatives .The mea- surement result of pyrrole derivatives with different functional group indicate that trans- port properties may effected by this different functional group and the bonding position. There have two different type of transport properties that is single transport and bipolar transport. In addition, carrier mobility have more than two order difference with this different functional group. Finally, we investigated carrier properties of anthracene derivatives. The measure- ment result indicate that the intermolecular aggregation can be solved by synthesizing another functional group to form polymer. This method not only perform excellent thin film stability but also keep bipolar transport property after synthesizing.
Kudriashova, Liudmila. "Photoluminescence Reveals Charge Carrier Recombination in Organic and Hybrid Semiconductors." Doctoral thesis, 2019. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-193437.
Full textIm Rahmen dieser Arbeit wurden Rekombinationsmechanismen in organischen und hybriden Halbleitern mittels statischer und zeitaufgelöster Photolumineszenz-Spektroskopie untersucht. Diese einfachen und flexiblen experimentellen Methoden erlaubten es, sowohl die infrarote Emission rekombinierender freier Ladungsträger in Perowskiten als auch die blaue Lumineszenz intramolekularer Ladungstransferzustände in neuartigen OLED-Emittern zu erforschen. Es wurde gezeigt, dass das Verhalten angeregter Ladungsträger in sehr unterschiedlichen Materialsystemen durch vergleichbare Zustandsdiagramme und kinetische Modelle beschrieben werden kann. Kapitel 4 und 5 legen den Fokus auf Bleiiodid-Perowskite (MAPI und FAPI), deren vergleichsweise etablierte Herstellungsmethode systematische Untersuchungen erlaubt. In MAPI wurde die anomale Abhängigkeit transienter PL von der Repetitionsrate des Lasers verwendet, um die Bedeutung der Grenzflächen zwischen Perowskitschicht und den gängigsten ladungsselektiven Schichten PC60BM, spiro-MeOTAD und P3HT zu untersuchen. Dafür wurde die Perowskitschicht auf ein Substrat aufgebracht, dieses in mehrere gleiche Stücke geteilt und anschließend mit einer jeweils unterschiedlichen ladungsselektiven Schicht bedeckt. Dies sicherte die Vergleichbarkeit der aktiven Schicht der verschiedenen Proben. Durch diesen Ansatz konnten der Einfluss des aktiven Materials als auch der seiner Grenzflächen auf die Ladungsträgerrekombination getrennt beobachtet werden. Ersterer dominierte den schnellen Anteil des PL-Abfalls, letzterer den langsamen Anteil. Die Repetitionsrate des Lasers verlangsamte den PL-Abfall in MAPI-Filmen mit zusätzlichen Grenzflächen signifikant, während sie die Lebensdauer der Ladungsträger in reinen MAPI- Filmen verkürzte. Dieser Effekt konnte durch ein qualitatives Modell erklärt werden, welches strahlende Elektron–Loch-Rekombination sowie nichtstrahlende Rekombination über Ladungsträgerfallen miteinbezieht. Insgesamt konnte gezeigt werden, dass die PL- Lebensdauer in MAPI stark von der Laserrepetitionsrate sowie von Grenzflächeneffekten abhängig ist. Des Weiteren wurde der Photon-Recycling-Effekt in MAPI und FAPI untersucht. Dafür wurde verfolgt, wie sich die lokale PL mit ihrer Ausbreitung durch den dünnen Perowskitfilm verändert. Die Emission konnte bis zu 70 μm entfernt von der Anregung gemessen werden, bei einer Abnahme der Intensität um fünf Größenordnungen. Mit reiner Anwendung des Lambert–Beer’sches Gesetzes konnte das auftretende komplexe Zusammenspiel des ursprünglichen Spektrums mit einer zusätzlichen rotverschobenen Emission nicht erklärt werden. Deshalb wurde ein allgemeines numerisches Modell entwickelt, das sowohl Selbstabsorption als auch die Diffusion sekundärer Ladungsträger berücksichtigt. Entsprechende Simulationen zeigten hervorragende Übereinstimmung mit räumlich aufgelösten experimentellen PL-Messungen. Das Modell kann auf jeden Perwoskitfilm angewendet werden, da die nötigen Parameter auf dem einfach messbaren intrinsischen PL- Spektrum und dem makroskopischen Absorptionskoeffizienten des jeweiligen Films beruhen. In Kapitel6 wird die umfangreiche photophysikalische Untersuchung eines neuartigen kompakten blauen OLED-Emitters, SBABz4, welcher Spiro-Biacridine und Benzonitril-Einheiten enthält, beschrieben. Auch sein Gegenstück DMABz4, als einfacher Donator, wurde betrachtet, um Zusammenhänge zwischen Struktur und Materialeigenschaften hervorzuheben. Beide Verbindungen zeigten thermisch-aktivierte verzögerte Fluoreszenz (TADF), welche unabhängig voneinander sowohl durch Sauerstoff- Fluoreszenzlöschung als auch durch temperaturabhängige transiente PL-Messungen nachgewiesen wurde. Die Spiro-Bindung im Inneren des zweifachen Donators SBABz4 führten zu einer, im Vergleich zur blaugrünen Emission des einfachen Donators DMABz4, reinen blauen Lumineszenz. Im Gegensatz zum Aufbau üblicher TADF-Molekülen mit zentralem Akzeptor, erlaubt in diesem Fall der zentrale Donator also die gewünschte Farbeinstellung im tiefblauen Bereich. Mit Hilfe von PL-Lebensdauern und -Effizienzen wurde eine EQEmax von 7.1% für SBABz4-basierte OLEDs abgeschätzt, während ein reales Testexemplar eine EQEmax von 6.8% aufzeigte. Transiente PL wurde für Lösungen sowie für feste Filme in einem beispiellos großen, dynamischen Bereich von sechs Größenordnungen in Zeit und acht Größenordnungen in Intensität aufgenommen. Die transiente PL der Filme lässt sich gut durch eine gestreckte Exponentialfunktion anpassen, während der PL-Abfall der Lösung rein exponentiell verläuft. Die Einbettung des Emitters in der Gast-Matrix, die Aggregieren verhinderte, führten zu gegenüber dem reinen SBABz4-Film überlegenen TADF- Eigenschaften. Zuletzt wurde die TADF Aktivierungsenergie von 70 meV unter alleiniger Verwendung der temperaturabhängigen transienten PL berechnet. Zusammengefasst steuert diese Doktorarbeit einen Beitrag zu zwei der faszinierendsten Themen der Materialforschung des letzten Jahrzehnts bei: Perowskitabsorbern für die Photovoltaik und TADF-Emittern für OLEDs. Diese Arbeit erlaubte es mit aufkommenden Systemen zu arbeiten und neue Modelle aus bekannten physikalischen Konzepten für sie zu entwickeln. Dies war sowohl spannend als auch anspruchsvoll. Letztlich ist Forschung an neuartigen Materialien immer ein großes Durcheinander. Hoffentlich konnte durch diese Arbeit jedoch ein wenig mehr Klarheit geschaffen werden
Li, Ming Hui, and 李明蕙. "Measurement of Charge Carrier Mobility in Organic Solar Cells Using Time of Flight Method." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/55445342716979788211.
Full text元智大學
光電工程研究所
97
Due to photovoltaic conversion efficiency of the organic polymer solar cells is closely related the charge transport mobility. But it’s low carrier mobility in organic polymer. So, in this study would change the poly-disperity in MEH-PPV to improve the hole mobility. We used chlorobenzene to be the dissolving for MEH-PPV and drop-cast fabricate thick films. Measurement the MEH-PPV hole mobility and poly- dispersity by time of flight method, photoluminescence, hotoluminescence excitation, and GPC. Experimental results show, the holes mobility are improved for change the poly-dispersity MEH-PPV. And then, the photovoltaic conversion efficiency of the organic polymer solar cells will be raised.
Kampfrath, Tobias [Verfasser]. "Charge carrier dynamics in solids and gases observed by time resolved terahertz spectroscopy / Tobias Kampfrath." 2005. http://d-nb.info/980805635/34.
Full textHerrfurth, Oliver. "Development of a femtosecond time-resolved spectroscopic ellipsometry setup." 2017. https://ul.qucosa.de/id/qucosa%3A34720.
Full textMöbius, Martin. "Nutzung der Photolumineszenz von Quantenpunkten für die Belastungsdetektion an Leichtbaumaterialien." 2019. https://monarch.qucosa.de/id/qucosa%3A73361.
Full textThis work focuses on the development of a novel, self-sufficient, film-based sensor system for load detection on lightweight materials. The integrated sensor system is capable to visualize mechanical loads on lightweight structures by quenching the photoluminescence of quantum dots. Structural defects in lightweight materials can thus be detected at an early stage and total failure of an entire lightweight structure can be prevented. In addition to increased safety of individual components and complete structures, this also leads to weight, cost and raw material savings. The quenching of the photoluminescence of quantum dots by charge carrier injection as the main mechanism of the sensor system requires special thin-film layer stacks. By combining these thin-film layer stacks with piezoelectric materials, a self-sufficient sensor system is created. An evaluation, visualization and storage of the information about a mechanical load that has taken place on lightweight materials is thus achieved in a very small space.:Inhaltsverzeichnis Formelverzeichnis Abkürzungsverzeichnis Vorwort 1 Einleitung 1.1 Motivation 1.2 Zielstellung 2 Autarker Sensor für mechanische Beanspruchungen 2.1 Sensorkonzept, -aufbau und Funktionsweise 2.2 Anforderungen an die Funktionalität 2.3 Stand der Technik 3 Theoretische Grundlagen 3.1 Quantum Dots 3.1.1 Größenquantisierungseffekt 3.1.2 Photolumineszenz 3.1.3 Aufbau und Materialien 3.1.4 Kommerziell erhältliche Quantum Dots 3.2 Mechanismen zur Beeinflussung der Photolumineszenz 3.2.1 Ladungsträgerinjektion in den QD Kern 3.2.2 Feldinduzierte Ionisation des Exzitons 3.2.3 Weitere Mechanismen 3.3 Ladungsträgertransportschichten 3.3.1 Poly(N-vinylkarbazol) 3.3.2 N,N,N´,N´-Tetrakis(3-methylphenyl)-3,3´-dimethylbenzidin 3.3.3 Poly(3,4-ethylendioxythiophen)-poly(styrolsulfonat) 3.4 Lithiumfluorid als elektrischer Isolator 3.5 Modellsysteme 3.5.1 Einbettung der QDs in organische Lochtransportschichten 3.5.2 QDs zwischen Elektrode und organischer Lochtransportschicht 3.5.3 QDs zwischen Elektrode und Nichtleiter 4 Experimentelle Vorgehensweise 4.1 Layout und Kontaktierung von Teststrukturen 4.2 Verfahren zur Herstellung dünner Schichten 4.2.1 Physikalische Gasphasenabscheidung 4.2.2 Rotationsbeschichtung 4.2.3 Weitere Verfahren 4.3 Charakterisierung der Schichten und der Gesamtfunktionalität 4.3.1 Mikrospektroskopieaufbau 4.3.2 Weitere Messverfahren 4.4 Integration der Schichtstapel in Faserkunststoffverbund 5 Experimentelle Untersuchungen 5.1 Einordnung der einzelnen Schichten der Modellsysteme 5.1.1 Elektroden 5.1.2 Matrixmaterial und Quantum Dots 5.2 Einordnung des elektrischen Verhaltens der Modellsysteme 5.2.1 Modellsystem I 5.2.2 Modellsystem II 5.2.3 Modellsystem III 5.3 Einfluss externer Beleuchtung am Modellsystem II und III 5.3.1 Modellsystem II 5.3.2 Modellsystem III 5.4 Wiederholbarkeit der elektrischen Beanspruchung am Modellsystem III 5.4.1 Photolumineszenzintensität 5.4.2 Stromdichte 5.4.3 Gesamtwiderstand im Schichtstapel 5.5 Einfluss des elektrischen Feldes am Modellsystem III 5.5.1 Photolumineszenzintensität 5.5.2 Stromdichte 5.5.3 Widerstand 5.6 Einfluss der Integration auf das Verhalten von Modellsystem III 5.6.1 Optisches Verhalten der Laminiertasche und des Harzsystems 5.6.2 Funktionalität des Schichtstapels nach der Integration 5.7 Temperaturwechseltest am integrierten Schichtstapel 5.8 Speicherzeit elektrischer Ladungsträger am Modellsystem III 5.8.1 Stabilität des Lasers und der PL Intensität 5.8.2 Reproduzierbarkeit 5.8.3 Langzeitmessung 5.9 Kopplung des Schichtsystems mit piezoelektrischem Element 6 Zusammenfassung und Ausblick 6.1 Zusammenfassung 6.2 Ausblick Anhang A : Layouts für untere Elektrode E1 und obere Elektrode E2 Anhang B : Halter für die Kontaktierung der Teststrukturen Anhang C : Frontpanel zur Aufnahme der Photolumineszenz Anhang D : Messdaten Profilometer Veeco Dektak 150 Literaturverzeichnis Abbildungsverzeichnis Tabellenverzeichnis Lebenslauf