Morphology control in polycarbazole based bulk heterojunction solar cells and its impact on device performance

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

143 Scopus Citations
View graph of relations

Author(s)

  • Ta-Ya Chu
  • Salima Alem
  • Shing-Chi Tse
  • Salem Wakim
  • Jianping Lu
  • Gilles Dennler
  • David Waller
  • Russell Gaudiana
  • Ye Tao

Detail(s)

Original languageEnglish
Article number253301
Journal / PublicationApplied Physics Letters
Volume98
Issue number25
Publication statusPublished - 20 Jun 2011
Externally publishedYes

Abstract

Incremental increase in dimethyl sulfoxide (or dimethyl formamide) in ortho-dichlorobenzene solution of poly [N -heptadecanyl-2,7-carbazole-alt-5,5- (4′, 7′ -di-2-thienyl- 2′, 1′, 3′ -benzothiadiazole)] (PCDTBT) gradually reduces the polymer-solvent interaction, the attraction forces between polymer chains become more dominant, and the polymer chains adopt a tight and contracted conformation with more interchain interactions, resulting in a progressive aggregation in both solutions and films. This was used to fine tune the morphology of PCDTBT/ PC71 BM based solar cells, leading to improved domain structure and hole mobility in the active layer, and significantly improved photovoltaic performance. The power conversion efficiency increased from 6.0% to 7.1% on devices with an active area of 1.0 cm2. © 2011 Crown.

Citation Format(s)

Morphology control in polycarbazole based bulk heterojunction solar cells and its impact on device performance. / Chu, Ta-Ya; Alem, Salima; Tsang, Sai-Wing; Tse, Shing-Chi; Wakim, Salem; Lu, Jianping; Dennler, Gilles; Waller, David; Gaudiana, Russell; Tao, Ye.

In: Applied Physics Letters, Vol. 98, No. 25, 253301, 20.06.2011.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review