Here is the link of that paper:
Ethynyl-Linked Donor-π-Acceptor Boron Dipyrromethenes for Panchromatic Dye-Sensitized Solar Cells
Dr. Wen-Jing Shi1,2, Dr. Takumi Kinoshita3,*and Prof. Dennis K. P. Ng1
Asian Journal of Organic Chemistry
Volume 6, Issue 6, pages 758–767, June 2017
DOI: 10.1002/ajoc.201700121