White light generation tuned by dual hybridization of nanocrystals and conjugated polymers

Demir, Hilmi Volkan; Nizamoğlu, Sedat; Özel, Tuncay; Mutlugün, Evren; Huyal, Ilkem Ozge; Sarı, Emre; Holder, Elisabeth; Tian, Nan

doi:10.1088/1367-2630/9/10/362

Cited by 38 publications

(10 citation statements)

References 7 publications

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“…Such hybrid NC-WLEDs that provide warm-white light with high color rendering index have also been realized [16]. Moreover, WLEDs based on the integration of both fluorescent polymers and nanocrystals have also been shown [17,18]. A WLED that consists of a blue/green two-wavelength InGaN/GaN LED integrated with red NCs has been reported [19].…”

mentioning

confidence: 99%

Tuning shades of white light with multi-color quantum-dot–quantum-well emitters based on onion-like CdSe–ZnS heteronanocrystals

Demir¹,

Nizamoğlu²,

Mutlugün³

et al. 2008

Nanotechnology

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We present white light generation controlled and tuned by multi-color quantum-dot-quantum-well emitters made of onion-like CdSe/ZnS/CdSe core/shell/shell heteronanocrystals integrated on InGaN/GaN light-emitting diodes (LEDs). We demonstrate hybrid white LEDs with (x, y) tristimulus coordinates tuned from (0.26, 0.33) to (0.37, 0.36) and correlated color temperatures from 27 413 to 4192 K by controlling the number of their integrated red-green-emitting heteronanocrystals. We investigate the modification of in-film emission from these multi-layered heteronanocrystals with respect to their in-solution emission, which plays a significant role in hybrid LED applications. Our proof-of-principle experiments indicate that these complex heteronanocrystals hold promise for use as nanoluminophors in future hybrid white LEDs.

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mentioning

confidence: 99%

Tuning shades of white light with multi-color quantum-dot–quantum-well emitters based on onion-like CdSe–ZnS heteronanocrystals

Demir¹,

Nizamoğlu²,

Mutlugün³

et al. 2008

Nanotechnology

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“…In analogy to the already very successful donor/acceptor approach for phosphorescent systems, 131 wide bandgap semiconducting polymers are used as donor hosts for semiconductor NCs. 132 In such blend systems, efficient energy transfer from host (polymer) to guest (NCs) takes place when the donor and acceptor moieties are in close spatial proximity and have a sufficient spectral overlap. [132][133][134][135] Energy and charge transfer from the polymer to the NCs requires an energy band offset at the organic/inorganic interface.…”

Section: Technology Driven Exploration Of Hybrid Materialsmentioning

confidence: 99%

“…132 In such blend systems, efficient energy transfer from host (polymer) to guest (NCs) takes place when the donor and acceptor moieties are in close spatial proximity and have a sufficient spectral overlap. [132][133][134][135] Energy and charge transfer from the polymer to the NCs requires an energy band offset at the organic/inorganic interface. To date, conjugated polymer hosts used in hybrid device technology include mainly the commercially available p-type wide bandgap polymers.…”

Section: Technology Driven Exploration Of Hybrid Materialsmentioning

confidence: 99%

Review—Organic-Inorganic Hybrid Functional Materials: An Integrated Platform for Applied Technologies

Mir

Nagahara

Thundat

et al. 2018

J. Electrochem. Soc.

306

156

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Hybrid functional materials, constituting both inorganic and organic components, are considered potential platforms for applications in extremely diverse fields such as optics, micro-electronics, transportation, health, energy, energy storage, diagnosis, housing, environment and the highly relevant area is Internet of Things (IoT). Material properties of hybrid materials can be tuned by modification of the composition on the molecular scale to produce smart materials. Cross-cutting approaches, to synergistically couple molecular engineering and processing allows to tailor complex hybrid systems of various shapes with perfect control over size, composition, functionality, and morphology. The detailed description and discussion of variety of hybrid functional organicinorganic materials and their contribution in the designing of specific modern technologies is the prime focus of this review. There is an enormous demand for hybrid materials to provide technological breakthroughs with the most sought after being the enabling of the IoT. Interest in the field of IoT will witness exponential growth over the next decade as markets realize the true potential of realtime data acquisition for various entertainment, knowledge dissemination, defense, environmental, and healthcare applications. Many of the well-established materials, such as metals, 1 ceramics, 2-4 or plastics 5,6 cannot fulfill all technological desires for the various new applications. In addition to the early interest in structural hybrid materials based on carbon-silicon networks, many recent efforts have centered on the design of functional hybrid materials which harness the chemical activity of their components. This approach has been successfully used in recent years in the design of hybrid polymers 7 with special emphasis on structural hybrid materials based on mixed silicon-carbon networks prepared by sol-gel methods [8][9][10][11][12] which can also entrap additional active species. 13 In this field the stakes are high and scientists aim at producing structural materials with properties between those of inorganic glasses and organic polymers.8 But the expectations go beyond mechanical strength and thermal and chemical stability. These new materials are also sought for improved optical, 14-17 and electrical 18,19 properties, luminescence, 12,20-25 ionic conductivity, [26][27][28] and selectivity, 29-32 as well as chemical [33][34][35] or biochemical 36-38 activity. Chemical activity is of core importance in functional materials. Sensors, selective membranes, all sorts of electrochemical devices, from actuators to batteries or supercapacitors, supported catalysts or photoelectrochemical energy conversion cells are some important devices based on hybrid functional materials.Hybridization is a multifaceted strategy. In some cases, conducting organic polymers act just as a solid polymeric support for active species, whereas in other hybrid systems the activity of organic and inorganic species combines to reinforce or modify each other. But in every case ...

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“…In particular, CdSe-QDs as one kind of typical II-VI semiconductor nanocrystal materials can emit the full visible spectrum by tuning the band gap and crystal sizes [17,18]. Demir et al [19] reported white light generation using layer-by-layer assembly of CdSe/ZnS core-shell NCs closely packed on polyfluorene and hybridized on near-UV emitting nitride-based LEDs. Also, they obtained white light using CdSe/ZnS core-shell nanocrystals of M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 3 single, dual, triple and quadruple combinations hybridized with InGaN/GaN LEDs [20,21].…”

Section: Introductionmentioning

confidence: 99%

Formulating CdSe quantum dots for white light-emitting diodes with high color rendering index

et al. 2015

Journal of Alloys and Compounds

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White light generation tuned by dual hybridization of nanocrystals and conjugated polymers

Cited by 38 publications

References 7 publications

Tuning shades of white light with multi-color quantum-dot–quantum-well emitters based on onion-like CdSe–ZnS heteronanocrystals

Tuning shades of white light with multi-color quantum-dot–quantum-well emitters based on onion-like CdSe–ZnS heteronanocrystals

Review—Organic-Inorganic Hybrid Functional Materials: An Integrated Platform for Applied Technologies

Formulating CdSe quantum dots for white light-emitting diodes with high color rendering index

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