White Light Emission Characteristics of Polymer-Encapsulated CdSe Nanocrystal Films

Author

Gosnell, Jonathan D. ; Rosenthal, Sandra J. ; Weiss, Sharon M.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Vanderbilt Univ., Nashville, TN, USA

Volume

22

Issue

8

fYear

2010

fDate

4/15/2010 12:00:00 AM

Firstpage

541

Lastpage

543

Abstract

A white, cadmium selenide (CdSe) nanocrystal-based phosphor light-emitting diode (LED) was fabricated in this work using a commercial ultraviolet (UV) LED topped with a thin film of nanocrystals encapsulated in a polymer. A range of film thicknesses were fabricated and different wavelength LEDs were employed to analyze their influences on the emission properties of the phosphor LEDs. The absorbance and emission intensity of light passing through the films were optimized without compromising the excellent inherent color quality of the white-light nanocrystals. These results indicate a potential to improve the color quality and lower the scattering losses found in current white LEDs based on much larger, micron-sized phosphors.

Keywords

II-VI semiconductors; cadmium compounds; light absorption; light emitting diodes; nanostructured materials; optical polymers; phosphors; ultraviolet sources; CdSe; film thicknesses; light absorbance intensity; light emission intensity; phosphor LED; phosphor light emitting diode; polymer encapsulated nanocrystal films; ultraviolet LED; white light emission; Light-emitting diodes (LEDs); nanotechnology; optical films; optics; photoluminescence; thin-film devices;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2010.2041549

Filename

5404437