Three-Band White Light-Emitting Diodes Based on Hybridization of Polyfluorene and Colloidal CdSe–ZnS Quantum Dots

Author

Huang, Chun-Yuan ; Huang, Tsung-Syun ; Cheng, Chiao-Yang ; Chen, Ying-Chih ; Wan, Cheng-Tien ; Rao, M. V Madhava ; Su, Yan-Kuin

Author_Institution

Dept. of Appl. Sci., Nat. Taitung Univ., Taitung, Taiwan

Volume

22

Issue

5

fYear

2010

fDate

3/1/2010 12:00:00 AM

Firstpage

305

Lastpage

307

Abstract

The authors have demonstrated the hybridization of polyfluorene (PFO) polymer light-emitting diodes with CdSe-ZnS core/shell quantum dots (QDs) in different device structures. To achieve white light emission, the green and red QDs have been incorporated into the PFO as the single emissive layer. Furthermore, the whole structures were also optimized to engineer the emission spectra. Accordingly, the incorporation of QDs increased the turn-on voltage from 10 to 23 V in device with the blend ratio of PFO : green QD : red QD being 6 : 1 : 1, while the maximum brightness was dramatically decreased.

Keywords

II-VI semiconductors; cadmium compounds; organic light emitting diodes; semiconductor quantum dots; wide band gap semiconductors; zinc compounds; CdSe-ZnS; colloidal quantum dots; green quantum dots; polyfluorene; red quantum dots; semiconductor quantum dots; three band white light emitting diodes; white light emission; Emissive polymers; light-emitting diodes (LEDs); quantum dots (QDs);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2009.2039207

Filename

5378502