@article{oai:nagoya.repo.nii.ac.jp:02001550, author = {Ogumi, Keisuke and Nakagawa, Takafumi and Nakano, Masahiro and Matsuo, Yutaka}, issue = {02}, journal = {Journal of Porphyrins and Phthalocyanines}, month = {Feb}, note = {Magnesium diethynylporphyrin derivatives with strong near-infrared absorption were obtained. These derivatives possess electron rich units directly introduced to the porphyrin core. The electron rich units caused strong absorption on the near-infrared region due to an intramolecular charge transfer. Theoretical calculation also proved that the derivatives showed large oscillator strength at the Q band. As a donor material, such large absorption coefficient in the range of long wavelength region is a desirable characteristic for organic solar cells. Organic photovoltaic devices using these diethynylporphyrin derivatives gave a PCE of 2.91% in optimal conditions.}, pages = {128--134}, title = {Magnesium diethynylporphyrin derivatives with strong near-infrared absorption for solution-process bulk heterojunction organic solar cells}, volume = {25}, year = {2021} }