Enhanced performance of organic thin film solar cells using electrodes with nanoimprinted light-diffraction and light-diffusion structures

Jheng Yuan Chen, Ming Hung Yu, Chih Yu Chang, Yi Hsiang Chao, Kien Wen Sun, Chain Shu Hsu

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

An ITO substrate with periodic surface nanostructures was used to induce strong diffusion and diffraction of incident light. The nanostructures were fabricated using nanoimprint lithography on photoresist followed by coating of the ITO layer and organic materials with uniform morphology. The nanostructures embedded into the ITO layer were found to increase absorption in poly(3-hexylthiophene): [6,6]-phenyl-C61-butyric acid methyl ester solar devices. The short-circuit current of the nanostructured organic solar cells improved from 7.07 to 10.76 mA/cm2. This improvement was due to the increased effective optical path of absorbed light resulting from the trapping and scattering by the nanostructures.

Original languageEnglish
Pages (from-to)6164-6169
Number of pages6
JournalACS Applied Materials and Interfaces
Volume6
Issue number9
DOIs
Publication statusPublished - May 14 2014
Externally publishedYes

Keywords

  • diffraction
  • haze
  • light trapping
  • nanoimprint lithography
  • nanostructure
  • organic photovoltaic

ASJC Scopus subject areas

  • Materials Science(all)

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