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Author | Title | Accn# | Year | Item Type | Claims |
| 1 |
Alvertis, Antonios M |
On Exciton???Vibration and Exciton???Photon Interactions in Organic Semiconductors |
I11874 |
2021 |
eBook |
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| 2 |
Bohn, Bernhard Johann |
Exciton Dynamics in Lead Halide Perovskite Nanocrystals |
I11766 |
2021 |
eBook |
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1.
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| Title | On Exciton???Vibration and Exciton???Photon Interactions in Organic Semiconductors |
| Author(s) | Alvertis, Antonios M |
| Publication | Cham, Springer International Publishing, 2021. |
| Description | XIX, 202 p. 70 illus., 60 illus. in color : online resource |
| Abstract Note | What are the physical mechanisms that underlie the efficient generation and transfer of energy at the nanoscale? Nature seems to know the answer to this question, having optimised the process of photosynthesis in plants over millions of years of evolution. It is conceivable that humans could mimic this process using synthetic materials, and organic semiconductors have attracted a lot of attention in this respect. Once an organic semiconductor absorbs light, bound pairs of electrons with positively charged holes, termed `excitons???, are formed. Excitons behave as fundamental energy carriers, hence understanding the physics behind their efficient generation and transfer is critical to realising the potential of organic semiconductors for light-harvesting and other applications, such as LEDs and transistors. However, this problem is extremely challenging since excitons can interact very strongly with photons. Moreover, simultaneously with the exciton motion, organic molecules can vibrate in hundreds of possible ways, having a very strong effect on energy transfer. The description of these complex phenomena is often beyond the reach of standard quantum mechanical methods which rely on the assumption of weak interactions between excitons, photons and vibrations. In this thesis, Antonios Alvertis addresses this problem through the development and application of a variety of different theoretical methods to the description of these strong interactions, providing pedagogical explanations of the underlying physics. A comprehensive introduction to organic semiconductors is followed by a review of the background theory that is employed to approach the relevant research questions, and the theoretical results are presented in close connection with experiment, yielding valuable insights for experimentalists and theoreticians alike. |
| ISBN,Price | 9783030854546 |
| Keyword(s) | 1. Computational Physics and Simulations
2. COMPUTER SIMULATION
3. EBOOK
4. EBOOK - SPRINGER
5. ELECTRONIC STRUCTURE
6. Electronic Structure Calculations
7. Materials science???Data processing
8. MATHEMATICAL PHYSICS
9. OPTICAL ENGINEERING
10. OPTOELECTRONIC DEVICES
11. PHOTONICS
12. Photonics and Optical Engineering
13. Photovoltaic power generation
14. PHOTOVOLTAICS
15. Quantum chemistry???Computer programs
16. SEMICONDUCTORS
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| Item Type | eBook |
Multi-Media Links
Please Click here for eBook
Circulation Data
| Accession# | |
Call# | Status | Issued To | Return Due On | Physical Location |
| I11874 |
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On Shelf |
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2.
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| Title | Exciton Dynamics in Lead Halide Perovskite Nanocrystals : Recombination, Dephasing and Diffusion |
| Author(s) | Bohn, Bernhard Johann |
| Publication | Cham, Springer International Publishing, 2021. |
| Description | XXII, 152 p. 62 illus., 58 illus. in color : online resource |
| Abstract Note | Less than a decade ago, lead halide perovskite semiconductors caused a sensation: Solar cells exhibiting astonishingly high levels of efficiency. Recently, it became possible to synthesize nanocrystals of this material as well. Interestingly; simply by controlling the size and shape of these crystals, new aspects of this material literally came to light. These nanocrystals have proven to be interesting candidates for light emission. In this thesis, the recombination, dephasing and diffusion of excitons in perovskite nanocrystals is investigated using time-resolved spectroscopy. All these dynamic processes have a direct impact on the light-emitting device performance from a technology point of view. However, most importantly, the insights gained from the measurements allowed the author to modify the nanocrystals such that they emitted with an unprecedented quantum yield in the blue spectral range, resulting in the successful implementation of this material as the active layer in an LED. This represents a technological breakthrough, because efficient perovskite light emitters in this wavelength range did not exist before |
| ISBN,Price | 9783030709402 |
| Keyword(s) | 1. EBOOK
2. EBOOK - SPRINGER
3. Electronic materials
4. Electronics???Materials
5. Nanoparticles
6. Nanophysics
7. NANOSCIENCE
8. OPTICAL MATERIALS
9. OPTICAL SPECTROSCOPY
10. Photovoltaic power generation
11. PHOTOVOLTAICS
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| Item Type | eBook |
Multi-Media Links
Please Click here for eBook
Circulation Data
| Accession# | |
Call# | Status | Issued To | Return Due On | Physical Location |
| I11766 |
|
|
On Shelf |
|
|
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