Molecules (Sep 2022)

Controlling the Treatment Time for Ideal Morphology towards Efficient Organic Solar Cells

  • Yiwen Hou,
  • Qiuning Wang,
  • Ciyuan Huang,
  • Tao Yang,
  • Shasha Shi,
  • Shangfei Yao,
  • Donglou Ren,
  • Tao Liu,
  • Guangye Zhang,
  • Bingsuo Zou

DOI
https://doi.org/10.3390/molecules27175713
Journal volume & issue
Vol. 27, no. 17
p. 5713

Abstract

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In this work, we performed a systematic comparison of different duration of solvent vapor annealing (SVA) treatment upon state-of-the-art PM6:SY1 blend film, which is to say for the first time, the insufficient, appropriate, and over-treatment’s effect on the active layer is investigated. The power conversion efficiency (PCE) of corresponding organic solar cell (OSC) devices is up to 17.57% for the optimized system, surpassing the two counterparts. The properly tuned phase separation and formed interpenetrating network plays an important role in achieving high efficiency, which is also well-discussed by the morphological characterizations and understanding of device physics. Specifically, these improvements result in enhanced charge generation, transport, and collection. This work is of importance due to correlating post-treatment delicacy, thin-film morphology, and device performance in a decent way.

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