Nearly warm white-light emission of silicon-rich amorphous silicon carbide

Tai, Hung-Yu; Cheng, Chih-Hsien; Wang, Po-Sheng; Wu, Chih-I; Lin, Gong‐Ru

doi:10.1039/c5ra19775a

Cited by 8 publications

(5 citation statements)

References 34 publications

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“…In the future, such a band-engineered a-SiC solid-state phosphor could easily nd its potential role in monolithically integrating with semiconductor light-emitting or laser devices for white-lighting applications. 47…”

Section: Resultsmentioning

confidence: 99%

Stoichiometry detuned silicon carbide as an orange and white light band solid-state phosphor

et al. 2016

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Section: Resultsmentioning

confidence: 99%

Stoichiometry detuned silicon carbide as an orange and white light band solid-state phosphor

et al. 2016

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“…Tohmon et al claimed that the PL of NOV defects in oxygendeficient high-purity silica glass at 459 nm [80]. The blue PL for NOV defects not only in the Si- In contrast to SiO x , either SiN x or SiC x is also considered as host matrix to confine the Si-QDs [63][64][65][66][67][68][69][70][71][72][73][74][75][76]. In 1992, Chen et al utilized the PECVD and Ar + -laser annealing to fabricate the Si:H/SiN x :H multiple quantum well (MQW).…”

Section: Photoluminescence Of Si-qdmentioning

confidence: 99%

“…Huang et al changed the SiH 4 fluence from 0.5 to 8 sccm to suppress the C/Si composition ratio and increase the Si-QD size for blue-to-green shifting PL wavelength from 440 to 520 nm [72]. Tai et al further demonstrated the Si-rich SiC synthesis for obtaining red PL between 630 and 660 nm from Si-QDs and 480 nm for SiC-QDs [73,74].…”

Section: Photoluminescence Of Si-qdmentioning

confidence: 99%

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Si-QD Synthesis for Visible Light Emission, Color Conversion, and Optical Switching

Cheng

Lin

2020

Materials

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This paper reviews the developing progress on the synthesis of the silicon quantum dots (Si-QDs) via the different methods including electrochemical porous Si, Si ion implantation, and plasma enhanced chemical vapor deposition (PECVD), and exploring their featured applications for light emitting diode (LED), color-converted phosphors, and waveguide switching devices. The characteristic parameters of Si-QD LED via different syntheses are summarized for discussion. At first, the photoluminescence spectra of Si-QD and accompanied defects are analyzed to distinguish from each other. Next, the synthesis of porous Si and the performances of porous Si LED reported from different previous works are compared in detail. Later on, the Si-QD implantation in silicide (SiX) dielectric films developed to solve the instability of porous Si and their electroluminescent performances are also summarized for realizing the effect of host matrix to increase the emission quantum efficiency. As the Si-ion implantation still generates numerous defects in host matrix owing to physical bombardment, the PECVD method has emerged as the main-stream methodology for synthesizing Si-QD in SiX semiconductor or dielectric layer. This method effectively suppresses the structural matrix imperfection so as to enhance the external quantum efficiency of the Si-QD LED. With mature synthesis technology, Si-QD has been comprehensively utilized not only for visible light emission but also for color conversion and optical switching applications in future academia and industry.

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“…White emitting nanomaterials are of current interest for use in organic light emitting diodes, pollution monitoring, and detection of ions . Sensors based on white emitting particles are expected to be more sensitive to analytes because white light is composed of three color components in specific intensity ratios, and any change in one color intensity can produce detectable, off‐white emission.…”

Section: Introductionmentioning

confidence: 99%

White-Emitting Protein Nanoparticles for Cell-Entry and pH Sensing

Stromer

Kumar

2016

Adv. Funct. Mater.

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Facile synthesis of white‐emitting, protein‐based, metal‐free, stable, nontoxic, and pH sensitive, advanced functional nanoparticles (GlowDots), as alternatives to quantum dots, is reported here. Controlled cross‐linking of bovine serum albumin resulted in facile formation of spherical nanoparticles of 35 nm in diameter with a sharp size distribution (±10 nm), which were then conjugated with specific dyes to produce white‐emitting particles with tunable excitation wavelengths. Chemical novelty is that the particle size, size distribution, stability, surface chemistry, and emission properties are under full chemical control where the size and absorption/emission properties are independently tuned. Up to 100 dye molecules were attached to each particle, on an average, and hence, particles acquired strong absorption cross‐sections as well as high brightness. White fluorescence of GlowDots is strongly sensitive to pH over a range of pH 2–11, and pH‐induced emission changes are fully reversible. The particles readily entered HeLa cells and emission color depended on particle location in the live cells, which is most likely due to the local environment surrounding the particles. These are the very first reports of white‐emitting advanced functional nanoparticles that are biodegradable, sensitive to pH, and amenable for live cell imaging to probe the subcellular compartments.

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Nearly warm white-light emission of silicon-rich amorphous silicon carbide

Abstract: An amorphous Si-rich SiC film with nearly warm white-light photoluminescence is synthesized to serve as a solid-state phosphorous material for white-lighting applications.

Cited by 8 publications

References 34 publications

Stoichiometry detuned silicon carbide as an orange and white light band solid-state phosphor

Stoichiometry detuned silicon carbide as an orange and white light band solid-state phosphor

Si-QD Synthesis for Visible Light Emission, Color Conversion, and Optical Switching

White-Emitting Protein Nanoparticles for Cell-Entry and pH Sensing

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