Photovoltaic Counter Electrodes: An Alternative Approach to Extend Light Absorption Spectra and Enhance Performance of Dye-Sensitized Solar Cells

Dui Ma, Jiantao Zai, Yan Wang, Qiquan Qiao, Xuefeng Qian

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

If counter electrodes (CEs) could also contribute to light harvesting in dye-sensitized solar cells (DSSCs), then the power conversion efficiency (PCE) of DSSCs would be further boosted without changing the device structure. Nearly monodispersed Ag 2 Se nanocrystals with a bandgap of 1.62 eV (∼765 nm) were synthesized via a one-pot process, and Ag 2 Se CEs were fabricated by using a spin-coating and annealing process. Incident photon-to-current conversion efficiency and photocurrent spectra indicated that Ag 2 Se CEs can generate the electricity by harvesting more visible light, which could not be absorbed by dye-sensitized photoanodes. Thus, compared to Pt CE (7.57 %), the DSSC based on Ag 2 Se CE exerted a higher PCE of 8.06 %. The development of photovoltaic CEs may offer an alternative way to promote the performance and competitiveness of DSSCs.

Original languageEnglish (US)
Pages (from-to)241-246
Number of pages6
JournalChemPlusChem
Volume84
Issue number3
DOIs
StatePublished - Mar 2019
Externally publishedYes

Keywords

  • counter electrodes
  • dye-sensitized solar cells
  • electrocatalysis
  • photovoltaics
  • silver selenide

ASJC Scopus subject areas

  • Chemistry(all)

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