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Environmentally Friendly Solvent‐Processed Organic Solar Cells that are Highly Efficient and Adaptable for the Blade‐Coating Method
Author(s) -
Zhao Wenchao,
Zhang Shaoqing,
Zhang Yun,
Li Sunsun,
Liu Xiaoyu,
He Chang,
Zheng Zhong,
Hou Jianhui
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201704837
Subject(s) - materials science , environmentally friendly , coating , isopropyl alcohol , tetrahydrofuran , chemical engineering , solvent , roll to roll processing , organic solar cell , nanotechnology , organic chemistry , polymer , composite material , chemistry , ecology , engineering , biology
The power conversion efficiencies (PCEs) of state‐of‐the‐art organic solar cells (OSCs) have increased to over 13%. However, the most commonly used solvents for making the solutions of photoactive materials and the coating methods used in laboratories are not adaptable for future practical production. Therefore, taking a solution‐coating method with environmentally friendly processing solvents into consideration is critical for the practical utilization of OSC technology. In this study, a highly efficient PBTA‐TF:IT‐M‐based device processed with environmentally friendly solvents, tetrahydrofuran/isopropyl alcohol (THF/IPA) and o ‐xylene/1‐phenylnaphthalene, is fabricated; a high PCE of 13.1% can be achieved by adopting the spin‐coating method, which is the top result for OSCs. More importantly, a blade‐coated non‐fullerene OSC processed with THF/IPA is demonstrated for the first time to obtain a promising PCE of 11.7%; even for the THF/IPA‐processed large‐area device (1.0 cm 2 ) made by blade‐coating, a PCE of 10.6% can still be maintained. These results are critical for the large‐scale production of highly efficient OSCs in future studies.