4.7 Article

Water-Processed Organic Solar Cell with Efficiency Exceeding 11%

Journal

POLYMERS
Volume 14, Issue 19, Pages -

Publisher

MDPI
DOI: 10.3390/polym14194229

Keywords

organic solar cells; surfactant-stripped nanoparticle; high efficiency; solvent additive

Funding

  1. National Natural Science Foundation of China [62104158]
  2. Natural Science Foundation of Top Talent of SZTU [GDRC202113]
  3. Guangdong Basic and Applied Basic Research Foundation [2019A1515011673]
  4. Education Department of Guangdong Province [2021KCXTD045]

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This study reports a state-of-the-art active material for the synthesis of water-borne nanoparticle dispersion, achieving ecofriendly fabrication of organic photovoltaics. By introducing 1,8-diiodooctane, the morphology of the nanoparticles was optimized, leading to a record efficiency of over 11% for water-processed OPVs. This research is of great importance for the industrial production of photovoltaic materials.
Water processing is an ideal strategy for the ecofriendly fabrication of organic photovoltaics (OPVs) and exhibits a strong market-driven demand. Here, we report a state-of-the-art active material, namely PM6:BTP-eC9, for the synthesis of water-borne nanoparticle (NP) dispersion towards ecofriendly OPV fabrication. The surfactant-stripping technique, combined with a poloxamer, facilitates purification and eliminates excess surfactant in water-dispersed organic semiconducting NPs. The introduction of 1,8-diiodooctane (DIO) for the synthesis of surfactant-stripped NP (ssNP) further promotes a percolated microstructure of the polymer and NFA in each ssNP, yielding water-processed OPVs with a record efficiency of over 11%. The use of an additive during water-borne ssNP synthesis is a promising strategy for morphology optimization in NP OPVs. It is believed that the findings in this work will engender more research interest and effort relating to water-processing in preparation of the industrial production of OPVs.

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