Self-Assembled Poly(3,4-ethylene dioxythiophene):Poly(styrenesulfonate)/Graphene Quantum Dot Organogels for Efficient Charge Transport in Photovoltaic Devices

Hong Chul Lim; Sa Hoon Min; Eunwoo Lee; Jyongsik Jang; Sung Hyun Kim; Jong-In Hong

doi:10.1021/acsami.5b02434

Self-Assembled Poly(3,4-ethylene dioxythiophene):Poly(styrenesulfonate)/Graphene Quantum Dot Organogels for Efficient Charge Transport in Photovoltaic Devices

ACS Appl Mater Interfaces. 2015 Jun 3;7(21):11069-73. doi: 10.1021/acsami.5b02434. Epub 2015 May 21.

Authors

Hong Chul Lim, Sa Hoon Min¹, Eunwoo Lee, Jyongsik Jang, Sung Hyun Kim, Jong-In Hong

Affiliation

¹ §Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Korea.

PMID: 25985236
DOI: 10.1021/acsami.5b02434

Abstract

We report the self-assembly of poly(3,4-ethylene dioxythiophene):poly(styrenesulfonate) (

Pedot: PSS) organogel films incorporating graphene quantum dots (GQDs). Because of the electrostatic interaction between the GQDs and the PEDOT chains, GQD@PEDOT core-shell nanostructures are readily formed. We demonstrate that the GQDs affect the reorientation of PEDOT chains and the formation of interconnected structure of PEDOT-rich domains, improving the charge transport pathway. The power conversion efficiency of the organic photovoltaic device containing the self-assembled organogel as the hole extraction layer (HEL) was 26% higher than the device with pristine PEDOT-PSS as the HEL.

Keywords: PEDOT:PSS; graphene quantum dots; organic photovoltaics; organogel; self-assembly.

Publication types

Letter
Research Support, Non-U.S. Gov't