Broadband light absorption enhancement in moth's eye nanostructured organic solar cells

Weixia Lan, Yanxia Cui, Qingyi Yang, Ming Fai Lo, Chun Sing Lee, Fu Rong ZHU

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

A comprehensive study on inverted organic solar cells (OSCs) with a moth's eye nanostructured (MEN) active layer was carried out. Performance of the MEN-based OSCs and the corresponding control planar cells, fabricated with blend of poly[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-bA] dithiophene-2, 6-diyl][3-fluoro-2-[(2- ethylhexyl) carbonyl]thieno[3,4-b]-thiophenediyl] (PTB7):[6,6]- phenyl-C70- butyric-acid-methyl-ester (PC70BM) was analyzed. The efficiency of the MEN-based OSCs was optimized by adjusting the height of MEN pattern in the active layer. Our experimental and theoretical results reveal that the MEN pattern enhances light absorption in the PTB7:PC70BM active layer, especially over the long wavelength region. This leads to a 7.8% increase in short circuit current density and a 6.1% increase in power conversion efficiency over those of the control planar cell.

Original languageEnglish
Article number057164
JournalAIP Advances
Volume5
Issue number5
DOIs
Publication statusPublished - 1 May 2015

Scopus Subject Areas

  • Physics and Astronomy(all)

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