Design of UV-Absorbing Donor Molecules for Nearly Imperceptible Organic Solar Cells

Melissa L. Ball, Quinn Burlingame, Hannah L. Smith, Tianran Liu, Sean R. Parkin, Antoine Kahn, Yueh Lin Loo

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Transparent photovoltaic cells are an emerging technology that can provide point-of-use electricity generation for building-integrated applications. While most transparent solar cells to date target absorption of the photon-rich near-infrared portion of the solar spectrum, these devices compromise color neutrality and transparency because of parasitic absorption of long-wavelength visible light. One solution to eliminate parasitic absorption is to employ materials that absorb near-ultraviolet light with sharper absorption cutoffs. Herein, we demonstrate organic donor materials based on N,N′-diaryl-diamines that incorporate a series of aryl linkers to systematically tune their absorption profiles. When paired with acceptor 4,6-bis(3,5-di-4-pyridinylphenyl)-2-methylpyrimidine in an inverted architecture with an indium tin oxide top electrode and an organic optical outcoupling layer, the three best-performing transparent solar cells exhibit average photopic-response-weighted transmittances of 80.3-82.0% and color-rendering indices of 95.0-97.1, both of which are records for organic photovoltaics, with power-conversion efficiencies of 0.43-0.70%.

Original languageEnglish
Pages (from-to)180-188
Number of pages9
JournalACS Energy Letters
Issue number1
StatePublished - Jan 14 2022

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ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry


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