Cs2SnI6-Encapsulated Multidye-Sensitized All-Solid-State Solar Cells

Byunghong Lee*, Yamuna Ezhumalai, Woongkyu Lee, Ming Chou Chen, Chen Yu Yeh, Tobin Jay Marks, R P H Chang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The design of a dye-sensitized solar cell (DSSC) based on the simultaneous incorporation of multiple dyes is examined. By investigating the use of the porphyrin-based YD2-o-C8 and YDD6, and the organic chromophore TTAR, which can act as complementary absorbers, we are able to enhance the capture of incoming light across the solar spectrum. This is demonstrated first by using a conventional DSSC architecture with a liquid electrolyte and performed a power conversion efficiency (PCE) of 11.2%, representing an improvement over cells based on each of the independent dyes. Next, we used Cs2SnI6 as an encapsulating layer over the sensitizing molecules to reduce charge leakage across the dye layers and also added to the absorption of longer wavelengths up to one micron. Finally, we fabricated a cell utilizing a Cs2SnI6/succinonitrile solid hole-transport electrolyte and achieved a PCE of ∼8.5%. It is expected that the all solid-state design will go a long way toward improving long-term device stability.

Original languageEnglish (US)
JournalACS Applied Materials and Interfaces
DOIs
StatePublished - Jan 1 2019

Keywords

  • CsSnI
  • Sn-TiO
  • donor (D)-π-bridge-acceptor (A) organic sensitizers
  • multisensitization
  • perovskite
  • photovoltaic cell
  • porphyrin
  • solid-state hole conductor

ASJC Scopus subject areas

  • Materials Science(all)

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