Triple-layer structured composite separator membranes with dual pore structures and improved interfacial contact for sustainable dye-sensitized solar cells

Soo Bong Hong, So Hyun Park, Jeong Hoon Kim, Sang Young Lee, Young Soo Kwon, Taiho Park, Phil Hyun Kang, Sung Chul Hong

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

A composite separator membrane (CSM) with an A/B/A type layered structure, composed of a microporous electrolyte-philic poly(vinylidene fluoride-co-hexafl uoropropylene) (PVdF-HFP) gel layer (A) and a submicrometer porous polyethylene (PE) or a macroporous poly(ethylene terephthalate) (PET) nonwoven matrix (B), is introduced in a dye-sensitized solar cell (DSSC). Commercially available PE and PET separator membranes (SMs) act as matrices that provide mechanical stability to the DSSC and permanent pore structures for facilitated ion transport. PVdF-HFP is used as a microporous gelator for improved interfacial contact between the solid SM and the electrodes. The PVdF-HFP gel impedes the charge recombination process between electron and I3- at the TiO2/electrolyte interface, resulting in improved electron lifetimes. The DSSC assembled with the CSM exhibits high initial solar energy conversion effi ciency (η, 6.1%) and stable η values over 1400., demonstrating good long term stability. The behaviors of the DSSC are attributed to the synergistic factors of the CSM, such as improved ion conductivity, electrolyte affi nity, electrolyte retention capability, effective interfacial contact, and plausible passivation of the dyes. This study demonstrates a practical combination of short- and long-term DSSC performance through the introduction of the CSM.

Original languageEnglish
Article number1400477
JournalAdvanced Energy Materials
Volume4
Issue number13
DOIs
Publication statusPublished - 2014 Sep 1

Bibliographical note

Publisher Copyright:
© 2014 WILEY-VCH Verlag GmbH & Co. KGaA.

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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