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Showing 1 to 20 of 185 for “"organic semiconductors"”.
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Theoretical studies on organic semiconductors
… with the calculation o f carrierm obilities in organic molecular crystals.Five models which have been proposed to account for thetransport of charge carriers in such crystals are discussed andevaluated in the light of the most recent improvements in theestimates of transfer integrals; and from …
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Spin Dynamics in Organic Semiconductors
Organic semiconductors exhibit exceptionally long spin lifetimes, and recent observations of the inverse spin hall effect as well as micrometer spin diffusion lengths in conjugated polymers have spiked interest in employing such carbon-based materials in spintronics applications. The charge …
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Seebeck coefficient in organic semiconductors
… to quantify the role of energetic disorder in organic semiconductors. To this end, a microfabricated chip was designed to perform accurate measurements of the Seebeck coefficient within the channel of the active layer in a field-effect transistor (FET). When measured within an FET, the Seebeck …
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Spin Transport in Organic Semiconductors
… and low temperature solution processability of organic semiconductors have enabled many applications such as light emitting diodes, flexible logic and solar cells, they are unexploited in their potential for use in solid state devices for spintronics and spin-based information processing. …
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Spin Currents in Organic Semiconductors
Organic semiconductors have recently been found to have a comparably large spin diffusion time and length. This makes them ideal candidates for spintronic devices. However, spin injection, transport and detection properties in organic materials have yet to be fully understood. This work studies …
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Chromophore-Matrix Interaction in Organic Semiconductors
Organische Halbleiter sind Moleküle und Polymere, welche durch die Konjugation ihres Elektronensystems Eigenschaften erhalten, die klassischen anorganischen Halbleitern ähnlich sind. Dadurch eignen sie sich zur Anwendung in Solarzellen, Leuchtdioden, Farbstoffen und Photokatalysatoren. Im Gegensatz …
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POLYMER ORGANIC SEMICONDUCTORS AND THEIR DEVICES
Organic semiconducting (OSC) polymers has been used in wide range of applications, such as light-emitting diodes, solar cells, and transistors. Here, different aspects regarding the optimization of this layer are discussed in their respective devices. Firstly, synthetic methodology based on Suzuki …
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Simulating exciton dynamics in organic semiconductors
Organic semiconductors are carbon-based semiconductors with number of unique benefits over traditional semiconductors such as low production costs, versatile synthesis processes, and high portability. Unlike traditional crystalline semiconductors that exhibit high level of homogeneity, organic …
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Synthesis and characterisation of novel organic semiconductors
Organic semiconductors (OSCs) attract considerable attention from blue-chip companies and research communities as potential substitutes of inorganic counterparts in electronic devices. Thiophenes are one of the most extensively studied and highly topical classes of electron-rich OSCs. Linked …
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Spin and Charge Dynamics in Organic Semiconductors
This thesis presents 3 experimental investigations combined with the underlying theoret ical framework: chapter 6 details the efforts made to investigate lateral spin transport (LST) in metal phthalocyanines with the underlying theory explained in chapter 3. We present the full process of obtaining …
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Charge carrier transport in amorphous organic semiconductors
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.
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Spin injection and manipulation in organic semiconductors
The use of organic semiconductors to enable organic spintronic devices requires the understanding of transport and control of the spin state of the carriers. This thesis deals with the above issue, focusing on the interface between the organic semiconductor and the spin source. The morphology of …
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Charge-carrier transport in amorphous organic semiconductors
… of efficient luminescence and absorption in organic semiconductors, organic light-emitting devices (OLEDs) and photovoltaics (OPVs) have attracted increasing interest. Organic semiconductors have proven to be a promising material set for novel optical and/or electrical devices. Not only do …
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Self-interaction and charge transfer in organic semiconductors
The fascinating properties of organic molecular semiconductors paved the way for a new class of electronic devices such as organic light-emitting diodes, transistors, or solar cells. Despite an inferior efficiency as compared to commonly used silicon-based technologies, organic semiconductors …
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Electronic evaluation of organic semiconductors towards electronic devices
Organic π-conjugated macromolecules, (polymers and oligomers) are an important class of semiconductor which are used in applications such as: field effect transistors, photovoltaics, organic light emitting diodes and electrochromic devices. The π-conjugated systems have tuneable band gaps (Eg) and …
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Acenaphthylene Based CP-PAH Materials for Organic Semiconductors
Organic-based electronic devices have received considerable attention because of their presumable advantages over traditional inorganic-based electronics, such as low cost, flexibility, and applicability for large area production. Because of the possible commercialization of electronic products …
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Localised states in organic semiconductors and their detection
In den letzten Jahren ist eine Vielzahl neuer organischer Polymere und niedermolekularer Verbindungen synthetisiert worden, die sich als aktive Komponente für Elektrolumineszenz-Bauelemente und andere elektronische Anwendungen eignen. Trotz der großen technologischen Bedeutung und des erheblichen …
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Towards Self-assembling Multichromophoric Materials for Organic Semiconductors
Organic semiconductors are generally lightweight, flexible materials that can be solution processed. These properties make them an economical alternative to inorganic semiconductors, as they can be more easily manufactured and integrated into existing infrastructure. However, organic electronic …
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Probing Spin in Organic Semiconductors via Magnetic Resonance
The study of spin dynamics in organic semiconductors is interesting not only for the exceptionally long spin lifetimes present in organics, but also because it can act as a probe of charge dynamics. Tools and techniques developed over the past 15 years aim to probe this connection, focusing on how …
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An investigation into vibrational dynamics in organic semiconductors
… effect on charge transport in thin films of organic semiconductors. Two classes of organic semiconductors are investigated- crystalline small molecules and conjugated polymers. Although device performance of both classes of materials has greatly improved over last two decades, detailed …
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