White light-emitting quantum dot diodes and tuning of luminescence processes

Liu, Bozhi; Li, Ruifeng; Hu, Lunzhen; Wu, Huizhen

doi:10.1007/s00339-014-8465-5

Cited by 6 publications

(6 citation statements)

References 20 publications

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“…Reproduced with permission from [115], Ó 2011 American Chemical Society. Reproduced with permission from [116], Ó 2012 Wiley InterScience emission from the surface states were employed in WLEDs to generate white light when combined with the blue emission from the hole transport material TPD [119]. One drawback of this kind of QDs is that the intensity of trap states emission depends strongly on the driven voltage, whereas the intensity of the band edge emission remains constant when the saturation emission is attained, causing overall instability of white light.…”

Section: Electroluminescent Wledsmentioning

confidence: 99%

Recent Progress in Quantum Dot Based White Light-Emitting Devices

Su,

Zhang,

Zhang

et al. 2016

Top Curr Chem (Z)

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Colloidal semiconductor quantum dots (QDs) have been widely employed as components of white light-emitting diodes (WLEDs) due to their excellent optical properties (highly saturated emission color, high luminescence quantum yield) as well as thermal and chemical stability. Much effort has been devoted to realize efficient QD-based WLEDs, including the synthesis of superior luminescent nanomaterials with excellent stabilities, and the design of advanced devices structures. In this paper, after introducing photometric parameters of the contemporary QD-based WLEDs, we highlight the recent progress in these devices grouped according to three main mechanisms for white light generation: optical excitation, direct charge carrier injection, and Förster resonance energy transfer. The methods to generate white light, the design of QD emitters and QD-based devices, as well as their fabrication techniques are considered, and the key scientific and technological challenges in the QD-based WLEDs are highlighted. Novel light-emitting materials for WLEDs such as carbon-based nanoparticles are also considered.

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Section: Electroluminescent Wledsmentioning

confidence: 99%

Recent Progress in Quantum Dot Based White Light-Emitting Devices

Su,

Zhang,

Zhang

et al. 2016

Top Curr Chem (Z)

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“…Due to the inefficient charge injection, the exciton recombination zone is located at the CTLs that are adjacent to the QD layer [25,26]. The observed QD emission resulted from the Förster resonant energy transfer (FRET) from the CTLs to the QDs [27][28][29]. Due to the incomplete FRET process, however, emission from the CTLs is also observed.…”

Section: Wqleds With a Mixed-qd Single Emlmentioning

confidence: 99%

“…Due to the incomplete FRET process, however, emission from the CTLs is also observed. As a result, the combination of emission from the CTLs and QDs could lead to the generation of white-light emission [26][27][28][29][30][31]. Moreover, in the early development stage, the performance of the blue QDs is quite poor.…”

Section: Wqleds With a Mixed-qd Single Emlmentioning

confidence: 99%

Recent progress in the device architecture of white quantum-dot light-emitting diodes

Zhang

Chen

2019

Journal of Information Display

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White-light-emission quantum dot light-emitting diodes (WQLEDs) have attracted great attention of late because they could have potential applications in both flat-panel displays and solid-state lighting due to their advantages of tunable emission spectra, low driving voltage, high luminous efficiency, and high brightness. Over the past decades, with the rapid development of both quantum dot (QD) materials and device structures, WQLEDs have achieved tremendous progress. This review investigates the influence of device architectures on the performance of WQLEDs. The importance and status of the WQLEDs based on CdSe-QDs are first discussed. Then WQLEDs with a mixed-QD single light emission layer (EML), a multilayered QD EML, and tandem structures are reviewed. WQLEDs based on cadmium-free QDs are also briefly introduced. Finally, the key challenges that WQLEDs are currently facing are identified, and some possible solutions are proposed for further developing stable and efficient WQLEDs.

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“…As a class of typical ternary II-VI semiconductive compounds, CdSeS alloyed nanostructures [7][8][9][10][11][12][13] have been intensively studied because of their fascinating and tunable optical and electrical properties [8,14] based on quantum confinement effect, such as their tunable band-gaps which can be varied from visible (∼2.42 eV for CdS) to near IR (∼1.73 eV for CdSe) [14]. And their excellent optical properties such as large nonlinear susceptibilities, fast response times, and good photoconduction [15,16] provide them with a wide range of potential applications in biomedicine [17][18][19] and optoelectronic devices [20][21][22][23][24][25]. In particular, those alloyed CdSeS nanostructures with high quantum efficiency, narrow spectral emission, wide band-gap energy, and easy color tunability are very good candidates for the next-generation optoelectronic and biomedical applications [19,26,27], such as solar cell, fluorescent labeling, in vivo imaging, biosensors, and drug delivery.…”

Section: Introductionmentioning

confidence: 99%

A Review on the Synthesis Methods of CdSeS‐Based Nanostructures

Wang

Peng

et al. 2015

Journal of Nanomaterials

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As typical II–VI ternary alloyed chalcogenides, CdSeS nanostructures have attracted intensive worldwide attention due to their excellent tunable optical properties based on quantum confinement effect and optical nonlinear phenomenon. Because CdSeS-based nanostructures have presented a great potential for applications in biomedicine and optoelectronic devices, different synthesis methods have been proposed to prepare CdSeS-based nanostructures with divergent optical properties to meet the needs of those applications, such as fluorescent labeling,in vivoimaging, waveguides, and solar cell. In this review, the tricks, advantages, and disadvantages of all these synthesis methods were discussed, including hot-injection synthesis, one-pot noninjection synthesis, microwave irradiation, solvothermal synthesis, template-assisted electrodeposition, thermal evaporation, and pulsed laser deposition. Special emphasis was put on those methods that are safe, economic, environment-friendly, and suitable for large-scale production of alloyed CdSeS nanostructures with high photoluminescence, high stability, and low/no cytotoxicity.

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White light-emitting quantum dot diodes and tuning of luminescence processes

Cited by 6 publications

References 20 publications

Recent Progress in Quantum Dot Based White Light-Emitting Devices

Recent Progress in Quantum Dot Based White Light-Emitting Devices

Recent progress in the device architecture of white quantum-dot light-emitting diodes

A Review on the Synthesis Methods of CdSeS‐Based Nanostructures

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