All-solution-processed, multilayered CuInS_2/ZnS colloidal quantum-dot-based electroluminescent device

Kim, Jong-Hoon; Yang, Heesun

doi:10.1364/ol.39.005002

Cited by 47 publications

(55 citation statements)

References 28 publications

(48 reference statements)

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“…It can be synthesized by using ar oute similar to the cation-exchange approach used to produce III-V NCs starting from Cu 2 S. [177] Since the size and shape of the NCs remain unchanged, it should again enable shape control, as already exists for Cu 2 S. [178] However,t he complex crystal structures lead to high-density sub-band-gap states being formed that cause the emission to become broader.C uInS 2 NCs have also been successfully incorporated into direct-injection LEDs,a lbeit with modest results. [179,180] Inorganic perovskite NCs of CsPbX 3 (X = Cl, Br,I )a re another example of ternary compounds that can serve as possible candidates for future display applications,b ut they also contain the undesired heavy metal Pb.T hese materials can be synthesized in avariety of sizes and shapes,with facile compositional tuning. [181][182][183][184][185][186] Inorganic perovskite NCs demonstrate high chemical stability,e specially for blue-and green-emitting perovskites.T heir high QY values (ca.…”

Section: Heavy-metal-free Scncsmentioning

confidence: 99%

Colloidal Quantum Nanostructures: Emerging Materials for Display Applications

2018

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Colloidal semiconductor nanocrystals (SCNCs) or, more broadly, colloidal quantum nanostructures constitute outstanding model systems for investigating size and dimensionality effects. Their nanoscale dimensions lead to quantum confinement effects that enable tuning of their optical and electronic properties. Thus, emission color control with narrow photoluminescence spectra, wide absorbance spectra, and outstanding photostability, combined with their chemical processability through control of their surface chemistry leads to the emergence of SCNCs as outstanding materials for present and next‐generation displays. In this Review, we present the fundamental chemical and physical properties of SCNCs, followed by a description of the advantages of different colloidal quantum nanostructures for display applications. The open challenges with respect to their optical activity are addressed. Both photoluminescent and electroluminescent display scenarios utilizing SCNCs are described.

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Section: Heavy-metal-free Scncsmentioning

confidence: 99%

Colloidal Quantum Nanostructures: Emerging Materials for Display Applications

2018

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“…This results in characteristic broad emission linewidths and long lifetimes. 107,108 Ref. 109 provides a comprehensive overview of the synthesis of ternary and quaternary chalcogenides, so it will not be discussed here.…”

Section: Synthesis Of Non-toxic Alternativesmentioning

confidence: 99%

“…In spite of the challenges associated with intra-band trap states in ternary chalcogenides, CIS-based NCs have also been successfully incorporated into direct-injection LEDs, 107,166,167 albeit with modest results. The best performance to date has been achieved using yellow-emitting CIS/ZnS in a hybrid organicinorganic architecture similar to that used for Cd-based LEDs (see Fig.…”

Section: Heavy-metal-free Nc Ledsmentioning

confidence: 99%

A sustainable future for photonic colloidal nanocrystals

2015

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Colloidal nanocrystals - produced in a growing variety of shapes, sizes and compositions - are rapidly developing into a new generation of photonic materials, spanning light emitting as well as energy harvesting applications. Precise tailoring of their optoelectronic properties enables them to satisfy disparate application-specific requirements. However, the presence of toxic heavy metals such as cadmium and lead in some of the most mature nanocrystals is a serious drawback which may ultimately preclude their use in consumer applications. Although the pursuit of non-toxic alternatives has occurred in parallel to the well-developed Cd- and Pb-based nanocrystals, synthetic challenges have, until recently, curbed progress. In this review, we highlight recent advances in the development of heavy-metal-free nanocrystals within the context of specific photonic applications. We also describe strategies to transfer some of the advantageous nanocrystal features such as shape control to non-toxic materials. Finally, we present recent developments that have the potential to make substantial impacts on the quest to attain a balance between performance and sustainability in photonics.

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“…In the common device architecture of QD-LED, the emissive layer of QD array is directly sandwiched by the layers of electron transport layer and hole transport layer that enable an efficient charge injection from cathode and anode, respectively, and an improved balance of charge carriers injected [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%