Building devices from colloidal quantum dots

Kagan, Cherie R.; Lifshitz, Efrat; Sargent, Edward H.; Talapin, Dmitri V.

doi:10.1126/science.aac5523

Cited by 1,050 publications

(1,012 citation statements)

References 116 publications

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“…QDs have many advantages in display applications, originating from the quantumconfinement effect. [16][17][18][19][20][21][22][23][24] For example, emission wavelengths of CdSe QDs can be tuned by changing their size to emit the entire visible light (Fig. 2a).…”

Section: Materials Design For Efficient Qledsmentioning

confidence: 99%

Flexible quantum dot light-emitting diodes for next-generation displays

et al. 2018

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In the future electronics, all device components will be connected wirelessly to displays that serve as information input and/or output ports. There is a growing demand of flexible and wearable displays, therefore, for information input/output of the nextgeneration consumer electronics. Among many kinds of light-emitting devices for these next-generation displays, quantum dot light-emitting diodes (QLEDs) exhibit unique advantages, such as wide color gamut, high color purity, high brightness with low turn-on voltage, and ultrathin form factor. Here, we review the recent progress on flexible QLEDs for the next-generation displays. First, the recent technological advances in device structure engineering, quantum-dot synthesis, and high-resolution full-color patterning are summarized. Then, the various device applications based on cutting-edge quantum dot technologies are described, including flexible white QLEDs, wearable QLEDs, and flexible transparent QLEDs. Finally, we showcase the integration of flexible QLEDs with wearable sensors, micro-controllers, and wireless communication units for the next-generation wearable electronics.

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Section: Materials Design For Efficient Qledsmentioning

confidence: 99%

Flexible quantum dot light-emitting diodes for next-generation displays

et al. 2018

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“…The required nanoscale inorganic semiconductor building blocks can be formed using chemical synthetic methods, sometimes referred to as ''bottom-up'' approaches, whereby controlled growth yields two-dimensional (2D) nanomembranes or nanoribbons (NMs, NRs), 35,36 one-dimensional (1D) nanowires (NWs), 37 zero-dimensional (0D) nanoparticles, 38 or in complex geometries that incorporate multiple such features. The most widely explored schemes involve NWs, where there are many examples of flexible/ stretchable electronics that exploit the outstanding electrical, 39 mechanical, 40 and optical properties 41 of these materials.…”

Section: Bottom-up Approachesmentioning

confidence: 99%

Inorganic semiconducting materials for flexible and stretchable electronics

et al. 2017

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Recent progress in the synthesis and deterministic assembly of advanced classes of single crystalline inorganic semiconductor nanomaterial establishes a foundation for high-performance electronics on bendable, and even elastomeric, substrates. The results allow for classes of systems with capabilities that cannot be reproduced using conventional wafer-based technologies. Specifically, electronic devices that rely on the unusual shapes/forms/constructs of such semiconductors can offer mechanical properties, such as flexibility and stretchability, traditionally believed to be accessible only via comparatively low-performance organic materials, with superior operational features due to their excellent charge transport characteristics. Specifically, these approaches allow integration of high-performance electronic functionality onto various curvilinear shapes, with linear elastic mechanical responses to large strain deformations, of particular relevance in bio-integrated devices and bio-inspired designs. This review summarizes some recent progress in flexible electronics based on inorganic semiconductor nanomaterials, the key associated design strategies and examples of device components and modules with utility in biomedicine.

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“…14 Com esse conjunto de características, os nanocristais semicondutores apresentam inúmeras aplicações, tais como: dispositivos emissores de luz (LEDs), [15][16][17][18][19] lasers, 3,18 computação quântica, 20 transistores, 21 células solares, 22,23 biomedicina e biossensores, 24,25 e para sistemas catalíticos diversos, [26][27][28] sendo esta última, uma área ainda pouco explorada.…”

Section: Figura 1 Densidade De Estados Em Uma Banda De Um Semicondutunclassified

Pontos quânticos ambientalmente amigáveis: destaque para o óxido de zinco

Sandri¹,

Krieger²,

Costa³

et al. 2017

Quim. Nova

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ENVIRONMENTALLY FRIENDLY QUANTUM DOTS: HIGHLIGHTING ZINC OXIDE. Semiconductor nanocrystals with sizes in the quantum confinement regime (2-10 nm) present special physical and chemical properties. Additionally, environment-friendly quantum dots (QDs), as zinc oxide and zinc sulfide, offer many practical usages. Herein the ZnO semiconductor nanocrystals properties will be preferentially explored, such as its luminescence, broad spectrum UV absorber and electronics performances, and therefore its multifunctionality, as well as its advantages compared to some toxics QDs. A review is carefully presented stressing some synthesis approaches for applications reasons toward devices, chemosensors, biological labels, UV-absorbers and photocatalysis. ZnO QDs have been used in combination with organic and other inorganic materials. Hybrid materials have many advantages compared to their individual contents leading to important contributions to science and technology. As a result, an important growth in material fields is noticeable.Keywords: ZnO quantum dots; environment-friendly quantum dots; photocatalysis; UV-blockers; size-dependent fluorescence emission. INTRODUÇÃOÉ notória a contribuição da nanotecnologia nas ciências biológi-cas, farmacêuticas e da saúde nestas últimas três décadas. Como resultado, tem-se observado uma oferta cada vez maior de novos materiais, inteligentes e funcionais, o melhoramento da qualidade de vida das pessoas e, consequentemente, um aumento na expectativa de vida. 1No início da década de 1980 apareceram os primeiros estudos para uma nova classe de nanocristais com capacidade de exibir propriedades espectroscópicas dependentes do tamanho, 2 advindas do efeito de confinamento quântico.3-5 O confinamento quântico é resultado da mudança da densidade dos estados eletrônicos, que por sua vez, está relacionada com a posição e momento para partículas livres e confinadas. Quando a energia e o momento são definidos, a posição destas partículas não pode ser definida com precisão. Se considerada a relação entre energia e momento para a fase sólida massiva, é como pensar que uma série de vibrações que ocorrem com pequenas diferenças de energia nesta fase serão comprimidas, gerando uma transição intensa e única em um ponto quântico (QD, do inglês quantum dot).5 Dita de outra maneira, com a redução do tamanho das partículas a excitação eletrônica é deslocada para regiões de maior energia e o oscilador fica com restrita capacidade de transição. A Figura 1 ilustra a densidade de estados partindo de um material massivo, tridimensional (a) e que, progressivamente, sofre o confinamento em uma das dimensões (b)-(d). 5QDs podem confinar transportadores de cargas e manter uma coerência de spin destes transportadores em um período de tempo maior que os correspondentes materiais massivos, característica essa fundamental para o desenvolvimento de tecnologia baseada em sistemas quânticos 6 e da manifestação de efeitos excitônicos expressivos, os quais dependem da forma e tamanho da estrutura de confinamento. 7A incidênc...

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Building devices from colloidal quantum dots

Cited by 1,050 publications

References 116 publications

Flexible quantum dot light-emitting diodes for next-generation displays

Flexible quantum dot light-emitting diodes for next-generation displays

Inorganic semiconducting materials for flexible and stretchable electronics

Pontos quânticos ambientalmente amigáveis: destaque para o óxido de zinco

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