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Exciton Dynamics in Lead Halide Perovskite Nanocrystals

Exciton Dynamics in Lead Halide Perovskite Nanocrystals
Author: Bernhard Johann Bohn
Publisher: Springer Nature
Total Pages: 169
Release: 2021-05-18
Genre: Science
ISBN: 303070940X

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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.


Exciton Dynamics in Lead Halide Perovskite Nanocrystals

Exciton Dynamics in Lead Halide Perovskite Nanocrystals
Author: Bernhard Johann Bohn
Publisher:
Total Pages: 0
Release: 2021
Genre:
ISBN: 9783030709419

Download Exciton Dynamics in Lead Halide Perovskite Nanocrystals Book in PDF, ePub and Kindle

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.


Halide Perovskites

Halide Perovskites
Author: Tze-Chien Sum
Publisher: John Wiley & Sons
Total Pages: 312
Release: 2019-03-25
Genre: Technology & Engineering
ISBN: 3527341110

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Real insight from leading experts in the field into the causes of the unique photovoltaic performance of perovskite solar cells, describing the fundamentals of perovskite materials and device architectures. The authors cover materials research and development, device fabrication and engineering methodologies, as well as current knowledge extending beyond perovskite photovoltaics, such as the novel spin physics and multiferroic properties of this family of materials. Aimed at a better and clearer understanding of the latest developments in the hybrid perovskite field, this is a must-have for material scientists, chemists, physicists and engineers entering or already working in this booming field.


Halide Perovskite Semiconductors

Halide Perovskite Semiconductors
Author: Yuanyuan Zhou
Publisher: John Wiley & Sons
Total Pages: 517
Release: 2023-12-22
Genre: Science
ISBN: 3527829032

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Halide Perovskite Semiconductors Enables readers to acquire a systematic and in-depth understanding of various fundamental aspects of halide perovskite semiconductors Halide Perovskite Semiconductors: Structures, Characterization, Properties, and Phenomena covers the most fundamental topics with regards to halide perovskites, including but not limited to crystal/defect theory, crystal chemistry, heterogeneity, grain boundaries, single-crystals/thin-films/nanocrystals synthesis, photophysics, solid-state ionics, spin physics, chemical (in)stability, carrier dynamics, hot carriers, surface and interfaces, lower-dimensional structures, and structural/functional characterizations. Included discussions on the fundamentals of halide perovskites aim to expand the basic science fields of physics, chemistry, and materials science. Edited by two highly qualified researchers, Halide Perovskite Semiconductors includes specific information on: Crystal/defect theory of halide perovskites, crystal chemistry of halide perovskites, and processing and microstructures of halide perovskites Single-crystals of halide perovskites, nanocrystals of halide perovskites, low-dimensional perovskite crystals, and nanoscale heterogeneity of halide perovskites Carrier mobilities and dynamics in halide perovskites, light emission of halide perovskites, photophysics and ultrafast spectroscopy of halide perovskites Hot carriers in halide perovskites, correlating photophysics with microstructures in halide perovskites, chemical stability of halide perovskites, and solid-state ionics of halide perovskites Readers can find solutions to technological issues and challenges based on the fundamental knowledge gained from this book. As such, Halide Perovskite Semiconductors is an essential in-depth treatment of the subject, ideal for solid-state chemists, materials scientists, physical chemists, inorganic chemists, physicists, and semiconductor physicists.


Semiconductor Nanocrystals

Semiconductor Nanocrystals
Author: Alexander L. Efros
Publisher: Springer Science & Business Media
Total Pages: 277
Release: 2013-06-29
Genre: Technology & Engineering
ISBN: 1475736770

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A physics book that covers the optical properties of quantum-confined semiconductor nanostructures from both the theoretical and experimental points of view together with technological applications. Topics to be reviewed include quantum confinement effects in semiconductors, optical adsorption and emission properties of group IV, III-V, II-VI semiconductors, deep-etched and self assembled quantum dots, nanoclusters, and laser applications in optoelectronics.


Nonlinear Photonics

Nonlinear Photonics
Author: Hyatt M. Gibbs
Publisher: Springer Science & Business Media
Total Pages: 218
Release: 2012-12-06
Genre: Science
ISBN: 3642754384

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Nonlinear photonics is the name given to the use of nonlinear optical devices for the generation, communication, processing, or analysis of information. This book is a progress report on research into practical applications of such devices. At present, modulation, switching, routing, decision-making, and detection in photonic systems are all done with electronics and linear optoelectronic devices. However, this may soon change, as nonlinear optical devices, e.g. picosecond samplers and switches, begin to complement optoelectonic devices. The authors succinctly summarize past accomplishments in this field and point to hopes for the future, making this an ideal book for newcomers or seasoned researchers wanting to design and perfect nonlinear optical devices and to identify applications in photonic systems.


Quantum-dot Based Light-emitting Diodes

Quantum-dot Based Light-emitting Diodes
Author: Morteza Sasani Ghamsari
Publisher: BoD – Books on Demand
Total Pages: 171
Release: 2017-10-25
Genre: Technology & Engineering
ISBN: 9535135759

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Quantum dot-based light emitting diodes were assigned to bringing together the latest and most important progresses in light emitting diode (LED) technologies. In addition, they were dedicated to gain the perspective of LED technology for all of its advancements and innovations due to the employment of semiconductor nanocrystals. Highly selective, the primary aim was to provide a visual source for high-urgency work that will define the future directions relating to the organic light emitting diode (OLED), with the expectation for lasting scientific and technological impact. The editor hopes that the chapters verify the realization of the mentioned aims that have been considered for editing of this book. Due to the rapidly growing OLED technology, we wish this book to be useful for any progress that can be achieved in future.


Charge Carrier and Exciton Dynamics Within Hybrid Lead Halide Perovskites of Mixed Composition and Dimensionality

Charge Carrier and Exciton Dynamics Within Hybrid Lead Halide Perovskites of Mixed Composition and Dimensionality
Author: Marine Eva Fedora Bouduban
Publisher:
Total Pages: 151
Release: 2019
Genre:
ISBN:

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Mots-clés de l'auteur: hybrid perovskites ; photophysics ; charge transfer excitons ; charge carriers dynamics ; interfaces ; femtosecond transient absorbance ; electroabsorption.


Perovskite Quantum Dots

Perovskite Quantum Dots
Author: Ye Zhou
Publisher: Springer Nature
Total Pages: 374
Release: 2020-08-27
Genre: Technology & Engineering
ISBN: 9811566372

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This book addresses perovskite quantum dots, discussing their unique properties, synthesis, and applications in nanoscale optoelectronic and photonic devices, as well as the challenges and possible solutions in the context of device design and the prospects for commercial applications. It particularly focuses on the luminescent properties, which differ from those of the corresponding quantum dots materials, such as multicolor emission, fluorescence narrowing, and tunable and switchable emissions from doped nanostructures. The book first describes the characterization and fabrication of perovskite quantum dots. It also provides detailed methods for analyzing the electrical and optical properties, and demonstrates promising applications of perovskite quantum dots. Furthermore, it presents a series of optoelectronic and photonic devices based on functional perovskite quantum dots, and explains the incorporation of perovskite quantum dots in semiconductor devices and their effect of the performance. It also explores the challenges related to optoelectronic devices, as well as possible strategies to promote their commercialization. As such, this book is a valuable resource for graduate students and researchers in the field of solid-state materials and electronics wanting to gain a better understanding of the characteristics of quantum dots, and the fundamental optoelectronic properties and operation mechanisms of the latest perovskite quantum dot-based devices.


Perovskite Photovoltaics and Optoelectronics

Perovskite Photovoltaics and Optoelectronics
Author: Tsutomu Miyasaka
Publisher: John Wiley & Sons
Total Pages: 484
Release: 2022-03-21
Genre: Technology & Engineering
ISBN: 3527347488

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Perovskite Photovoltaics and Optoelectronics Discover a one-of-a-kind treatment of perovskite photovoltaics In less than a decade, the photovoltaics of organic-inorganic halide perovskite materials has surpassed the efficiency of semiconductor compounds like CdTe and CIGS in solar cells. In Perovskite Photovoltaics and Optoelectronics: From Fundamentals to Advanced Applications, distinguished engineer Dr. Tsutomu Miyasaka delivers a comprehensive exploration of foundational and advanced topics regarding halide perovskites. It summarizes the latest information and discussion in the field, from fundamental theory and materials to critical device applications. With contributions by top scientists working in the perovskite community, the accomplished editor has compiled a resource of central importance for researchers working on perovskite related materials and devices. This edited volume includes coverage of new materials and their commercial and market potential in areas like perovskite solar cells, perovskite light-emitting diodes (LEDs), and perovskite-based photodetectors. It also includes: A thorough introduction to halide perovskite materials, their synthesis, and dimension control Comprehensive explorations of the photovoltaics of halide perovskites and their historical background Practical discussions of solid-state photophysics and carrier transfer mechanisms in halide perovskite semiconductors In-depth examinations of multi-cation anion-based high efficiency perovskite solar cells Perfect for materials scientists, crystallization physicists, surface chemists, and solid-state physicists, Perovskite Photovoltaics and Optoelectronics: From Fundamentals to Advanced Applications is also an indispensable resource for solid state chemists and device/electronics engineers.