Controlling the morphology of the active layer by using additives and its effect on bulk hetero-junction solar cell performance

Viet Hau Thanh Pham, Nguyen Tam Nguyen Truong, Thanh Kieu Trinh, Sang Hoon Lee, Chinho Park

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

-Improvement of the surface roughness and power conversion efficiency (PCE) of bulk hetero-junction (BHJ) solar cells was made by the addition of organic additives for the cells based on a low energy-gap polymer, poly [2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta [2,1-b;3,4-b'] dithiophene)-alt-4,7(2,1,3-benzothiadiazole)] (PCPDTBT), as an electron donor and [6,6]-phenyl C61 butyric acid methyl ester (PC61BM) as the electron acceptor. The PCPDTBT: PC61BM active layers were prepared by spin-coating process from four different organic solvents: pure chlorobenzene, chlorobenzene with 2.5 vol% 1,2-ethanedithiol (EDT) additive, chlorobenzene with 2.5 vol% 1,8-octanedithiol (ODT) additive, and chlorobenzene with a combination of 2.5 vol% EDT and 2.5 vol% ODT additives. The smoothest surface of the active layer, which was observed by AFM, was obtained in the case of PCPDTBT:PC61BM prepared with a combination of EDT and ODT additives in chlorobenzene, and a maximum PCE of 3.5% was achieved.

Original languageEnglish
Pages (from-to)678-682
Number of pages5
JournalKorean Journal of Chemical Engineering
Volume33
Issue number2
DOIs
Publication statusPublished - 2016 Feb 1
Externally publishedYes

Keywords

  • 1,2-Ethanedithiol
  • 1,8-Octanedithiol
  • Additives
  • Bulk Hetero-junction
  • Organic Solar Cells

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Fingerprint Dive into the research topics of 'Controlling the morphology of the active layer by using additives and its effect on bulk hetero-junction solar cell performance'. Together they form a unique fingerprint.

  • Cite this