A research team lead by Professor Jian-Hui Hou from the Institute of Chemistry, Chinese Academy of Sciences, has optimized the alkyl chains of the BTP-4Cl and synthesized a series of new non-fullerene electron acceptors (NFAs) that can be used for large-area coatings. The team applied the new NFAs in fabricating large-area coated OPV cells and achieved good results. Their study was published in National Science Reviews, “17% efficiency organic photovoltaic cell with superior processability.”

In cooperation with Professor Wei Ma from Xi’an Jiaotong University, they found that a BTP-4Cl-12 had balanced solution processability and aggregation features. The results were that the blade-coating film showed an excellent phase separation morphology, which contributed to the high carrier transport and suppressed charge recombination in the OPV cells. The findings demonstrated that the efficiency of the photoactive materials’ chemical structures substantially impacted large-area coating production.

To learn more about this research, read: https://phys.org/news/2020-02-photovoltaic-cell-efficiency-superior-large-area.html

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