Characterization of quantum dot/conducting polymer hybrid films and their application to light-emitting diodes

Jeonghun Kwak; Wan Ki Bae; Matthias Zorn; Heeje Woo; Hyunsik Yoon; Jaehoon Lim; Sang Wook Kang; Stefan Weber; Hans-Jürgen Butt; Rudolf Zentel; Seonghoon Lee; Kookheon Char; Changhee Lee

doi:10.1002/adma.200902072

Characterization of quantum dot/conducting polymer hybrid films and their application to light-emitting diodes

Adv Mater. 2009 Dec 28;21(48):5022-5026. doi: 10.1002/adma.200902072. Epub 2009 Oct 1.

Authors

Jeonghun Kwak¹, Wan Ki Bae^{2

1}, Matthias Zorn³, Heeje Woo², Hyunsik Yoon², Jaehoon Lim², Sang Wook Kang², Stefan Weber⁴, Hans-Jürgen Butt⁴, Rudolf Zentel³, Seonghoon Lee⁵, Kookheon Char², Changhee Lee¹

Affiliations

¹ School of Electrical Engineering and Computer Science Inter-University Semiconductor Research Center (ISRC) Seoul National University Seoul, 151-744 (Republic of Korea).
² School of Chemical and Biological Engineering Center for Functional Polymer Thin Films Seoul National University Seoul, 151-744 (Republic of Korea).
³ Institute for Organic Chemistry Johannes Gutenberg University of Mainz Duesbergweg 10-14, 55128 Mainz (Germany).
⁴ Max Planck Institute for Polymer Research Ackermannweg 10, 55128 Mainz (Germany).
⁵ School of Chemistry NANO Systems Institute, National Core Research Center Seoul National University Seoul, 151-747 (Republic of Korea).

PMID: 25378234
DOI: 10.1002/adma.200902072

Abstract

Quantum dot/conducting polymer hybrid films are used to prepare light-emitting diodes (LEDs). The hybrid films (CdSe@ZnS quantum dots excellently dispersed in a conducting polymer matrix, see figure) are readily prepared by various solution-based processes and are also easily micropatterned. The LEDs exhibit a turn-on voltage of 4 V, an external quantum efficiency greater than 1.5%, and almost pure-green quantum-dot electroluminescence.

Keywords: Hybrid Materials; Light-emitting diodes; Quantum dots.