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Highly efficient organic photovoltaic cells fabricated by electrospray deposition using a non‐halogenated solution
Author(s) -
Takahira Kazuya,
Toda Asuki,
Suzuki Katsumi,
Fukuda Takeshi
Publication year - 2017
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201600536
Subject(s) - acetonitrile , electrospray , xylene , solvent , evaporation , materials science , photovoltaic system , deposition (geology) , substrate (aquarium) , environmentally friendly , layer (electronics) , chemical engineering , mass spectrometry , analytical chemistry (journal) , nanotechnology , chemistry , organic chemistry , chromatography , ecology , paleontology , physics , oceanography , sediment , biology , engineering , thermodynamics , geology , benzene
Since a large amount of solvents are needed for roll‐to‐roll printing processes of organic photovoltaic cells, an environmentally friendly process for practical mass production systems is in high demand. In this research, a highly efficient organic photovoltaic cell was successfully demonstrated by the electrospray deposition method using a non‐halogenated solvent, o ‐xylene. An addition of acetonitrile and 1,8‐diiodooctane drastically reduced domain size of the organic active layer, resulting in improved device performance. In addition, the photoconversion efficiency was continuously increased with increasing the solvent evaporation time of a droplet deposited on a substrate, and the highest photoconversion efficiency of 5.6% was achieved by optimizing the solvent evaporation time. Current‐density–voltage characteristics under irradiation with AM 1.5 light and corresponding AFM images of the active layers electrosprayed with and without the addition of 1,8‐diiodooctane in o ‐xylene and acetonitrile.