In Situ Doping of the PEDOT Top Electrode for All-Solution-Processed Semitransparent Organic Solar Cells

Taeyoon Ki, Chelim Jang, Jong Sung Jin, Jehan Kim, Nara Kim, Heehun Moon, Soo Young Jang, Sooncheol Kwon, Jubin Jang, Hongkyu Kang, Kwanghee Lee

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The development of an ideal solution-processable transparent electrode has been a challenge in the field of all-solution-processed semitransparent organic solar cells (ST-OSCs). We present a novel poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) top electrode for all-solution-processed ST-OSCs through in situ doping of PEDOT:PSS. A strongly polarized long perfluoroalkyl (n = 8) chain-anchored sulfonic acid effectively eliminates insulating PSS and spontaneously crystallizes PEDOT at room temperature, leading to outstanding electrical properties and transparency of PEDOT top electrodes. Doped PEDOT-based ST-OSCs yield a high power conversion efficiency of 10.9% while providing an average visible transmittance of 26.0% in the visible range. Moreover, the strong infrared reflectivity of PEDOT enables ST-OSCs to reject 62.6% of the heat emitted by sunlight (76.7% from infrared radiation), outperforming the thermal insulation capability of commercial tint films. This light management approach using PEDOT enables ST-OSCs to simultaneously provide energy generation and energy savings, making it the first discovery toward sustainable energy in buildings.

Original languageEnglish
Pages (from-to)47317-47326
Number of pages10
JournalACS Applied Materials and Interfaces
Volume15
Issue number40
DOIs
StatePublished - 11 Oct 2023

Keywords

  • all-solution-processed solar cells
  • organic solar cells
  • PEDOT
  • semitransparent solar cells
  • solution-processable electrode

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