High Throughput Quantum Dot Based LEDs

Amini, Pegah; Dolatyari, Mahboubeh; Rostami, G.; Rostami, Ali

doi:10.5772/59092

Cited by 3 publications

(2 citation statements)

References 33 publications

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“…The synthesis of colloidal QDs by chemical procedures in solution allows achieving tunable sizes of QDs 30,55 ; also the creation of suitable conditions for synthesis in this method is more convenient. The solution process is economical compared with the other expensive methods like epitaxial which needs a high-vacuum condition 30,31 .…”

Section: The Proposed Switchable Two-color Qd-laser Using Secsmentioning

confidence: 99%

“…Basically, the size of QDs can be controlled by providing suitable experimental conditions such as the concentration of materials, temperature, pH and the speed of rotation of solvent 35,36 . In this technology, the diameter range of QDs can be tuned from 1 nm to 10 nm 30,31,37 . However, having the 0.1 nm size deviation for synthesized QD in the appropriate experimental condition is possible 37-39 .…”

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Switchable Multi-Color Solution-Processed QD-laser

Matloub

Amini

Rostami

2020

Sci Rep

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In this paper, for the first time, the switchable two-color quantum dot laser has been realized considering solution process technology, which has both simultaneous and lonely lasing capability exploiting selective energy contacts. furthermore, both channels can be modulated independently, which is a significant feature in high-speed data transmission. To this end, utilizing superimposed quantum dots with various radii in the active layer provides the different emission wavelengths. In order to achieve the different sizes of QDs, solution process technology has been used as a costeffectiveness and fabrication ease method. Moreover, at the introduced structure to accomplish the idea, the quantum wells are used as separate selective energy contacts to control the lasing channels at the desired wavelength. It makes the prominent device have simultaneous lasing at different emission wavelengths or be able to lase just at one wavelength. the performance of the proposed device has been modeled based on developed rate equation by assuming inhomogeneous broadening of energy levels as a consequence of the size distribution of quantum dots and considering tunnel injection of carriers into the quantum dots via selective energy contacts. Based on simulation results, the simultaneous lasing in both or at one of two wavelengths 1.31 μm and 1.55 μm has been realized by the superimposition of two different sizes of InGaAs quantum dots in a single cavity and accomplishment of selective energy contacts. Besides, controlling the quantum dot coverage leads to managing the output power and modulation response at the desired wavelengths. By offering this idea, one more step is actually taken to approach the switchable QD-laser by the simple solution process method.Nowadays, multi-wavelength lasers have been committed to numerous applications in the field of imaging, tomography and ultra-fast data communication. Thus, the ability to achieve simultaneous lasing at different wavelengths has been the subject of enormous research in the past few years 1-5 . In addition, lasers have drawn great attention due to their wide potential applications in all-optical switching system 6 and on/off switching behavior 7 , ultrafast photonics 8-10 , playing roles as the light irradiation source for cancer therapy 11-14 , analyzing the photo-thermal properties 15-17 and excitation source for Raman spectra measurement 18,19 . Moreover, the high performance of lasers can be accomplished by utilizing quantum dots (QDs) in the active region of laser diodes. Hence, the quantum dot lasers (QD-Lasers) have been received great attention in recent decades among different types of laser structures [20][21][22][23][24][25] . The low threshold current, high modulation bandwidth, narrow linewidth, low-frequency chirp, and temperature stability are the superior advantages of QD-lasers due to the QDs' unique properties such as quantum confinement effect and delta-function-like density of states 4,26-29 . Consequently, the realization of switchable multi-wavelength las...

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Section: The Proposed Switchable Two-color Qd-laser Using Secsmentioning

confidence: 99%

mentioning

confidence: 99%

Switchable Multi-Color Solution-Processed QD-laser

Matloub

Amini

Rostami

2020

Sci Rep

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Ultra-high-efficiency luminescent solar concentrator using superimposed colloidal quantum dots

et al. 2020

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Recent Developments in Applications of Quantum-Dot Based Light-Emitting Diodes

Armăşelu¹

2017

Quantum-Dot Based Light-Emitting Diodes

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Quantum dot-based light-emitting diodes (QD-LEDs) represent a form of light-emitting technology and are regarded like a next generation of display technology after the organic light-emitting diodes (OLEDs) display. QD-LEDs are different from liquid crystal displays (LCDs), OLEDs, and plasma displays due to the fact that QD-LEDs present an ideal blend of high brightness, efficiency with long lifetime, flexibility, and low-processing cost of organic LEDs. So, QD-LEDs show theoretical performance limits which surpass all other display technologies. The goal of this chapter is, firstly, to provide a historical prospective study of QD-LEDs applications in display and lighting technologies, secondly, to present the most recent improvements in this field, and finally, to discuss about some current directions in QD-LEDs research that concentrate on the realization of the next-generation displays and high-quality lighting with superior color gamut, higher efficiency, and high color rendering index.

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High Throughput Quantum Dot Based LEDs

Cited by 3 publications

References 33 publications

Switchable Multi-Color Solution-Processed QD-laser

Switchable Multi-Color Solution-Processed QD-laser

Ultra-high-efficiency luminescent solar concentrator using superimposed colloidal quantum dots

Recent Developments in Applications of Quantum-Dot Based Light-Emitting Diodes

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