Development of Self-Doped Conjugated Polyelectrolytes with Controlled Work Functions and Application to Hole Transport Layer Materials for High-Performance Organic Solar Cells

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

44 Scopus Citations
View graph of relations

Author(s)

  • Jea Woong Jo
  • Jae Woong Jung
  • Seunghwan Bae
  • Min Jae Ko
  • Heesuk Kim
  • Won Ho Jo
  • Hae Jung Son

Detail(s)

Original languageEnglish
Article number1500703
Journal / PublicationAdvanced Materials Interfaces
Volume3
Issue number12
Publication statusPublished - 21 Jun 2016
Externally publishedYes

Abstract

A series of anionic self-doped conjugated polyelectrolytes (CPEs) by copolymerization of a 1,4-bis(4-sulfonatobutoxy)benzene moiety with different counter monomers of thiophene, bithiophene, and terthiophene is reported. The CPEs show high conductivity of ≈10−4 S cm−1 due to being self-doped in a neutral state and exhibit excellent hole transporting property in the out-of-plane direction, compared with poly(3,4-ethylenedioxythiophene):poly(styrene-sulfonate) (PEDOT:PSS). Moreover, the CPE incorporating a less electron-donating unit from terthiophene to thiophene exhibits a higher work function and therefore, PhNa-1T incorporating thiophene shows a relatively high work function of 5.21 eV than 4.97 eV of PEDOT:PSS. This can induce a higher internal field in the solar cell device, facilitating efficient charge collection to the electrode. As a result, polymer solar cell devices incorporating the CPEs as a hole transporting layer achieve enhanced photovoltaic performances from those of the conventional PEDOT:PSS-based devices. The solar cell efficiency reaches up to 9.89%, which is among the highest values demonstrated by PCE-10-based normal-type organic solar cells.

Research Area(s)

  • conducting polymers, conjugated polyelectrolytes, doping, hole transport layers, organic solar cells

Citation Format(s)

Development of Self-Doped Conjugated Polyelectrolytes with Controlled Work Functions and Application to Hole Transport Layer Materials for High-Performance Organic Solar Cells. / Jo, Jea Woong; Jung, Jae Woong; Bae, Seunghwan et al.
In: Advanced Materials Interfaces, Vol. 3, No. 12, 1500703, 21.06.2016.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review