Over 17.7% efficiency ternary-blend organic solar cells with low energy-loss and good thickness-tolerance

Jinhua Gao, Xiaoling Ma, Chunyu Xu, Xuelin Wang, Jae Hoon Son, Sang Young Jeong, Yang Zhang, Caixia Zhang, Kai Wang, Lianbin Niu, Jian Zhang, Han Young Woo, Fujun Zhang

Research output: Contribution to journalArticlepeer-review

113 Citations (Scopus)


Ternary-blend organic solar cells (TOSCs) are fabricated with PM6:BTP-4F-12 as the host system and IT-M as the third component. The third component IT-M takes multiple roles in improving performance of TOSCs through reducing energy-loss of the optimized TOSCs, optimizing molecular arrangement and phase separation in active-layers. The well optimized molecular arrangement and phase separation can be beneficial to charge separation and transport in TOSC, which can be confirmed by the characterization of 2D grazing incidence wide-angle X-ray scattering, transmission electron microscopy, magneto-photocurrent, as well as electrochemical impedance spectroscopy. By finely optimizing IT-M content, a power-conversion-efficiency (PCE) of 17.71% is achieved in the optimized TOSCs, benefiting from simultaneously enhanced short-circuit-current density (JSC) of 25.95 mA cm−2, open-circuit-voltage (VOC) of 0.875 V and fill-factor (FF) of 78.02% in comparison with the OSCs with PM6:BTP-4F-12 as active-layers. Furthermore, average PCE over 15% can be achieved from twenty individual TOSCs with active-layer thickness of 300 nm, indicating the optimized TOSCs have excellent thickness tolerance.

Original languageEnglish
Article number129276
JournalChemical Engineering Journal
Publication statusPublished - 2022 Jan 15

Bibliographical note

Funding Information:
This work is supported by the NSFC (61975006, 61874016), PITSP (BX20200042), BNSF (4192049). H.Y.W. acknowledges the financial support from the NRF of Korea (2020M3H4A3081814 and 2019R1A6A1A11044070).

Publisher Copyright:
© 2021 Elsevier B.V.


  • Energy loss
  • Morphology optimization
  • Organic solar cells
  • Ternary strategy

ASJC Scopus subject areas

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering


Dive into the research topics of 'Over 17.7% efficiency ternary-blend organic solar cells with low energy-loss and good thickness-tolerance'. Together they form a unique fingerprint.

Cite this