Full-color Carbon Quantum Dots (FCQDs) have intrinsic characteristics as components for White Light Emitting Diode (WLED) technology, but are not yet applied in the current lighting industry. In this work, FCQDs were prepared by optimizing the synthetic route in order to obtain a simple and one-step solvothermal carbonization of citric acid and urea in dimethylformamide. The synthesis at 166 °C for 11 h and 24 min (FCQD2) was selected from spectroscopy in the ultraviolet–visible (UV–Vis) region and its fluorescence indicated emission over almost the entire visible region of the electromagnetic spectrum with a 380 nm excitation source and a concentration of 0.22 mg mL −1. The morphological, structural and optical properties were evaluated and they showed that nanoparticles with dimensions between 2 and 10 nm consisted mainly of carbon atoms with functional groups on the surface. FCQD2 was incorporated in a polymeric matrix (PVA) and the coordinates of the Color Rendering Index (CRI) showed better color quality than a commercial WLED. It appears that FCQD2, with an easy synthesis and being ecofriendly, has potential for incorporation in a solid matrix, as well as application in WLEDs for the improvement of optoelectronic devices, replacing inorganic quantum dots. 

One-pot Solvothermal Synthesis of Full-color Carbon Quantum Dots for Application in Light Emitting Diodes

Luminescent composites by in-suit encapsulating dye in IRMOF-3 for ratiometric temperature sensing and tunable white light emission

A lighting device with a wide color-tunable range is still a challenge for lighting based on either organic light-emitting diodes (OLEDs) or inorganic LEDs. In this work, we first proposed a novel hybrid device of organic LEDs and inorganic blue GaN LEDs to achieve full white and other colors. Organic LEDs were stacked with green and red emissive layers and connected with blue GaN LEDs in parallel but in opposite polarity voltage. Under the alternate-current (AC) driving, the hybrid structure can be controlled independently by applying timing variable opposite voltages to emit the light from either blue LEDs or the stacked OLEDs for forming mixed colors. The hybrid device can generate white light, varying in a wide range by changing the amplitude and duty ratio (DR) of AC-driving signals, from cold white to standard white and to warm white (3668–11 833 K). When an AC voltage of (4.80 V, −2.45 V) was applied, the device has a high color gamut of 95.24% National Television System Committee (NTSC) and a high color rendering index (Ra) of 92.4%. The novel hybrid device with the blue LED and OLED in opposite polarity exhibits potential applications in smart solid-state lighting, display, and light communication.

Hybrid Device of Blue GaN Light-Emitting Diodes and Organic Light-Emitting Diodes with Color Tunability for Smart Lighting Sources

High Color-Rendering Index and Stable White Light-Emitting Diodes Based on Highly Luminescent Quantum Dots

Quantum dots (QDs) have unique properties, which make them valuable in some commercial technologies. This review discusses the major types and applications of QDs, their potential environmental exposures, fates, and adverse effects on organisms. 

Assessing the environmental effects related to quantum dot structure, function, synthesis and exposure

Thick-shell CdZnSe/ZnSe/ZnS quantum dots for bright white light-emitting diodes

Handle everyday research tasks with reliable, citation-backed results

Your personal Research Agent to handle research tasks with citation-backed results

Popular Tasks used by Researchers

How can I help with your research?

Meet SciSpace

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Xiaoying Li

Author Tools

Chat about Author

Papers

Thick-shell CdZnSe/ZnSe/ZnS quantum dots for bright white light-emitting diodes