Enhanced overall conversion efficiency of dye-sensitized solar cells using nano-hollow patterns for efficient light scattering

Sungjin Moon, Sang Woo Ryu, Hak Jong Choi, Junho Jun, Chaehyun Kim, Hee Chul Lee, Heon Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Dye-sensitized solar cells (DSSCs) have attracted great attention due to their distinct efficiency, very low fabrication cost, good performance under diffuse light condition, and ability to be fabricated on flexible substrates. One of the main efficiency-limiting factors of DSSCs is the poor light absorption of dye molecules at longer wavelengths. In this work, we formed cylindrical nano-hollow patterns (CNHPs) between the TiO2 nanoparticle (TNP) film and the front transparent electrode by using the direct printing technique and etching process to improve the light absorption of dye molecules at longer wavelengths. In addition, optical properties such as diffused transmittance and light absorption were measured by using UV-visible spectrometer. Optical characterizations of the TNP films with CNHPs revealed strong light scattering within the wavelength range of ∼600 ∼800 nm Owing to the light scattering effect provided by the CNHPs formed in the TNP films, increases in the short-circuit photocurrent density and overall conversion efficiency of the DSSCs were observed.

Original languageEnglish
Pages (from-to)10693-10697
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume16
Issue number10
DOIs
Publication statusPublished - 2016 Oct 1

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Keywords

  • Cylindrical Nano-hollow pattern
  • DSSC
  • Nanoimprint lithography
  • TiO

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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