A benzoperylene probe self-assembled on polyethyleneimine/manganese doped ZnS quantum dots: a new nanocomposite for bright and tunable white light emission. Issue 86 (1st September 2016)

• Record Type: Journal Article
• Authors: Sang, Lijia; Yang, Meiding; Zhou, Huipeng; Huang, Xinan; Yu, Cong
• Is Part Of: RSC advances. Volume 6:Issue 86(2016)
• Page Start: 83110
• Page End: 83116
• Publication Date: 2016-09-01
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra18465k
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A white light emitting benzoperylene probe-polyethyleneimine capped quantum dots nanocomposite has been synthesized for the first time. Abstract : A bright white light emitting benzoperylene probe-polyethyleneimine capped quantum dot nanocomposite has been synthesized for the first time. The negatively charged benzoperylene probe with a carboxylic acid functional group tends to self-assemble in the presence of a polycation, and exhibits distinct induced excimer fluorescence. Phosphorescence emitting manganese doped zinc sulfide quantum dots (Mn-ZnS QDs) were capped with polyethyleneimine (PEI). The PEI capped Mn-ZnS QDs were used to induce the benzoperylene probe self-assembly. A bright white light emitting nanocomposite was obtained both in solution and in solid state. The white emission has Commission Internationale de l'Eclairage (CIE) coordinates of (0.33, 0.32), a color-rendering index (CRI) of 72.61 and correlated color temperature (CCT) of 5697 K. Multiple color emissions from blue to orange could also be obtained in a controllable manner via simple adjustment of the ratio of the PEI capped Mn-ZnS QDs and the benzoperylene probe. The nanocomposite displays good photo, chemical and long-term stability. A strong white light emitting LED device based on the nanocomposite was demonstrated.