Semi-transparent quaternary organic blends for advanced photovoltaic applications

Minwoo Nam, Hye Yeon Noh, Joo Han Kang, Junhee Cho, Byoung Koun Min, Jae Won Shim, Doo Hyun Ko

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


In spite of enormous promise in a multitude of applications, semi-transparent organic photovoltaics (ST OPVs) relatively lag behind opaque OPVs in the efficiency, and further efforts are imperative to improve their performance while preserving their transparency and tunable color perceptivity. Here, we develop highly efficient ST OPVs based on quaternary blends (Q-blend) involving non-fullerene small molecules, and demonstrate their realistic application in four-terminal (4T) tandem PVs. The ST quaternary OPV (Q-OPV) exhibits superior power conversion efficiencies (PCEs) higher than those of the state-of-the-art ST OPVs under any irradiation conditions, while retaining high transparency and the possibility of implementing various colors. In particular, we achieve the first PCE value exceeding 15% (~15.46%) under indoor lighting among the ST OPVs reported to date. The 4T tandem configurations based on a ST Q-OPV with diverse opaque PVs demonstrate broadband photon harvesting, with aesthetic functions rendered from the color-codable ST Q-OPV. The benefits of the Q-blend platform, including efficient operation under any irradiation circumstance (both indoor and outdoor lighting) and device color codability via tuning the quaternary components, can further expand the applicability of the ST Q-OPV to various practical applications.

Original languageEnglish
Pages (from-to)652-659
Number of pages8
JournalNano Energy
Publication statusPublished - 2019 Apr
Externally publishedYes


  • Four-terminal tandem photovoltaics
  • Indoor lighting
  • Quaternary blend
  • Semi-transparent organic photovoltaics

ASJC Scopus subject areas

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


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