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Colloidal Quantum Dot Light Emitting Diodes

2024-02-20 Technology & Engineering
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Release : 2024-02-20
Genre : Technology & Engineering
Kind : eBook
Book Rating : 275/5 ( reviews)

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Book Synopsis Colloidal Quantum Dot Light Emitting Diodes by : Hong Meng

Download or read book Colloidal Quantum Dot Light Emitting Diodes written by Hong Meng. This book was released on 2024-02-20. Available in PDF, EPUB and Kindle. Book excerpt: Explore all the core components for the commercialization of quantum dot light emitting diodes Quantum dot light emitting diodes (QDLEDs) are a technology with the potential to revolutionize solid-state lighting and displays. Due to the many applications of semiconductor nanocrystals, of which QDLEDs are an example, they also hold the potential to be adapted into other emerging semiconducting technologies. As a result, it is critical that the next generation of engineers and materials scientists understand these diodes and their latest developments. Colloidal Quantum Dot Light Emitting Diodes: Materials and Devices offers a comprehensive introduction to this subject and its most recent research advancements. Beginning with a summary of the theoretical foundations and the basic methods for chemically synthesizing colloidal semiconductor quantum dots, it identifies existing and future applications for these groundbreaking technologies. The result is tailored to produce a thorough understanding of this area of research. Colloidal Quantum Dot Light Emitting Diodes readers will also find: An author with decades of experience in the field of organic electronics Detailed discussion of topics including advanced display technologies, the patent portfolio and commercial considerations, and more Strategies and design techniques for improving device performance Colloidal Quantum Dot Light Emitting Diodes is ideal for material scientists, electronics engineers, inorganic and solid-state chemists, solid-state and semiconductor physicists, photochemists, and surface chemists, as well as the libraries that support these professionals.

Colloidal Quantum Dot Optoelectronics and Photovoltaics

2013-11-07 Science
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Release : 2013-11-07
Genre : Science
Kind : eBook
Book Rating : 267/5 ( reviews)

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Book Synopsis Colloidal Quantum Dot Optoelectronics and Photovoltaics by : Gerasimos Konstantatos

Download or read book Colloidal Quantum Dot Optoelectronics and Photovoltaics written by Gerasimos Konstantatos. This book was released on 2013-11-07. Available in PDF, EPUB and Kindle. Book excerpt: Captures the most up-to-date research in the field, written in an accessible style by the world's leading experts.

Quantum-dot Based Light-emitting Diodes

2017-10-25 Technology & Engineering
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Release : 2017-10-25
Genre : Technology & Engineering
Kind : eBook
Book Rating : 759/5 ( reviews)

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Book Synopsis Quantum-dot Based Light-emitting Diodes by : Morteza Sasani Ghamsari

Download or read book Quantum-dot Based Light-emitting Diodes written by Morteza Sasani Ghamsari. This book was released on 2017-10-25. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Colloidal Quantum Dot Optoelectronics and Photovoltaics

2013-11-07 Technology & Engineering
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Author :
Release : 2013-11-07
Genre : Technology & Engineering
Kind : eBook
Book Rating : 368/5 ( reviews)

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Book Synopsis Colloidal Quantum Dot Optoelectronics and Photovoltaics by : Gerasimos Konstantatos

Download or read book Colloidal Quantum Dot Optoelectronics and Photovoltaics written by Gerasimos Konstantatos. This book was released on 2013-11-07. Available in PDF, EPUB and Kindle. Book excerpt: Capturing the most up-to-date research in colloidal quantum dot (CQD) devices, this book is written in an accessible style by the world's leading experts. The application of CQDs in solar cells, photodetectors and light-emitting diodes (LEDs) has developed rapidly over recent years, promising to transform the future of clean energy, communications, and displays. This complete guide to the field provides researchers, students and practitioners alike with everything they need to understand these developments and begin contributing to future applications. Introductory chapters summarise the fundamental physics and chemistry, whilst later chapters review the developments that have propelled the field forwards, systematically working through key device advances. The science of CQD films is explained through the latest physical models of semiconductor transport, trapping and recombination, whilst the engineering of organic and inorganic multilayered materials is shown to have enabled major advances in the brightness and efficiency of CQD LEDs.

Efficiency Loss Mechanisms in Colloidal Quantum-dot Light-emitting Diodes

2013
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Release : 2013
Genre :
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Book Synopsis Efficiency Loss Mechanisms in Colloidal Quantum-dot Light-emitting Diodes by : Yasuhiro Shirasaki

Download or read book Efficiency Loss Mechanisms in Colloidal Quantum-dot Light-emitting Diodes written by Yasuhiro Shirasaki. This book was released on 2013. Available in PDF, EPUB and Kindle. Book excerpt: Saturated and tunable emission colors make colloidal quantum-dot light-emitting diodes (QD-LEDs) interesting for the next generation of display and lighting technologies. However, there still remain various hurdles to the commercialization of QD-LEDs, including their relatively low external quantum efficiencies (EQE). In this thesis, we study the efficiency loss mechanisms present in the latest generation of QD-LEDs. We start with understanding the origin of reduced efficiencies at high current density operation, known as the efficiency roll-off. Through simultaneous measurement of quantum dot (QD) electroluminescence (EL) and photoluminescence (PL) efficiencies during device operation, we identify that the reduced PL efficiency of the QDs at high current densities is the cause for the efficiency roll-off. Furthermore, comparison of QD EL spectra, taken under forward bias, and PL spectra, taken under reverse bias, suggests that this reduced PL efficiency is electric-field-induced. We use the relationship between PL peak-shifts and PL quenching of QDs subject to the quantum confined Stark effect to predict the efficiency roll-off in forward bias. The roll-off predicted by this analysis is in excellent agreement with our experimental data and correctly traces an EQE reduction of nearly 50%. We complement the ELPL study with electroabsorption spectroscopy measurements of a biased QD-LED, which confirms that the charging of the QDs is not voltage bias dependent and is thus unrelated to the roll-off. Finally, we study the effect of Auger recombination on QD-LEDs by varying the QD layer thickness. QD-LEDs with thicker QD layers exhibit lower peak EQEs and QD transient PL with stronger bi-exponential behavior. We attribute the strength of the bi-exponential behavior to the fraction of the QDs charged in the device, which can explain the correlation between the strength of the bi-exponential behavior and the EQE.

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