title: [C70] fullerene-sensitized triplet-triplet annihilation upconversion.
abstract: We herein report the first instance of using pristine C70 as a heavy-atom free organic sensitizer for efficient triplet-triplet annihilation upconversion (UC) for both green-to-blue and red-to-green UC using 9,10-bis(phenylethynyl)anthracene and perylene as acceptors, respectively. C70 achieved quantum yields of 8% and 0.8% for green-to-blue and red-to-green UC, 25 to 35 times higher than C60, and showed improved stability under continuous laser irradiation compared to the benchmark platinum(II)-octaethylporphyrin.
authors.affiliation: Department of Chemical and Environmental Engineering, School of Engineering and Applied Science, Yale University, New Haven, CT 06511, USA. jaehong.kim@yale.edu.
authors.forename: Kyle
authors.initials: K
authors.lastname: Moor
authors.forename: Jae-Hyuk
authors.initials: JH
authors.lastname: Kim
authors.forename: Samuel
authors.initials: S
authors.lastname: Snow
authors.forename: Jae-Hong
authors.initials: JH
authors.lastname: Kim