• Medientyp: E-Artikel
  • Titel: High performance tandem organic solar cells via a strongly infrared-absorbing narrow bandgap acceptor
  • Beteiligte: Jia, Zhenrong [VerfasserIn]; Qin, Shucheng [VerfasserIn]; Ade, Harald [VerfasserIn]; Brabec, Christoph J. [VerfasserIn]; Li, Yongfang [VerfasserIn]; Meng, Lei [VerfasserIn]; Ma, Qing [VerfasserIn]; Angunawela, Indunil [VerfasserIn]; Zhang, Jinyuan [VerfasserIn]; Li, Xiaojun [VerfasserIn]; He, Yakun [VerfasserIn]; Lai, Wenbin [VerfasserIn]; Li, Ning [VerfasserIn]
  • Erschienen: Nature Publishing Group UK, 2021
  • Erschienen in: Nature Communications 12(1), 178 (2021). doi:10.1038/s41467-020-20431-6
  • Sprache: Englisch
  • DOI: https://doi.org/10.1038/s41467-020-20431-6
  • ISSN: 2041-1723
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  • Beschreibung: Tandem organic solar cells are based on the device structure monolithically connecting two solar cells to broaden overall absorption spectrum and utilize the photon energy more efficiently. Herein, we demonstrate a simple strategy of inserting a double bond between the central core and end groups of the small molecule acceptor Y6 to extend its conjugation length and absorption range. As a result, a new narrow bandgap acceptor BTPV-4F was synthesized with an optical bandgap of 1.21 eV. The single-junction devices based on BTPV-4F as acceptor achieved a power conversion efficiency of over 13.4% with a high short-circuit current density of 28.9 mA cm−2. With adopting BTPV-4F as the rear cell acceptor material, the resulting tandem devices reached a high power conversion efficiency of over 16.4% with good photostability. The results indicate that BTPV-4F is an efficient infrared-absorbing narrow bandgap acceptor and has great potential to be applied into tandem organic solar cells.
  • Zugangsstatus: Freier Zugang