Issue 10, 2016

Fluorescent polyvinyl alcohol films based on nitrogen and sulfur co-doped carbon dots towards white light-emitting devices

Abstract

Nitrogen and sulfur co-doped carbon dots (NS-CDs) were synthesized via a facile hydrothermal process using citric acid monohydrate as the carbon source and L-cysteine as the additive. The morphology, surface structure and fluorescence properties of as-obtained sample were elaborated in detail. The results show that the size of NS-CDs is about 2.9 nm without any obvious aggregation. Oxygen-, nitrogen- and sulfur-containing functional groups exist on the surface of NS-CDs. As the as-prepared NS-CDs possess promising optical properties, such as high quantum yield (67.41%), strong absorption in UV region and excitation-dependent feature, fluorescent films of the NS-CDs in polyvinyl alcohol (PVA) matrix were prepared. These films exhibit a broad emission covering the entire visible region as with NS-CDs aqueous solution, and a drastically elevated blue-to-red spectral composition (61.30%) compared with NS-CDs aqueous solution (31.60%). Beyond that, white light-emitting diodes, which were produced by dispersing NS-CDs in PVA matrix with a 365 nm UV-LED chip, emit warm white light with a color coordinate of (0.40, 0.38), a correlated color temperature of 3980 K and luminance of 3629 cd m−2.

Graphical abstract: Fluorescent polyvinyl alcohol films based on nitrogen and sulfur co-doped carbon dots towards white light-emitting devices

Article information

Article type
Paper
Submitted
04 Jun 2016
Accepted
22 Aug 2016
First published
22 Aug 2016

New J. Chem., 2016,40, 8710-8716

Fluorescent polyvinyl alcohol films based on nitrogen and sulfur co-doped carbon dots towards white light-emitting devices

Y. Wang, Y. Zhao, F. Zhang, L. Chen, Y. Yang and X. Liu, New J. Chem., 2016, 40, 8710 DOI: 10.1039/C6NJ01753C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements