TY - JOUR
T1 - Singlet Fission in 9,10-Bis(phenylethynyl)anthracene Thin Films
AU - Bae, Youn Jue
AU - Kang, Gyeongwon
AU - Malliakas, Christos D.
AU - Nelson, Jordan N.
AU - Zhou, Jiawang
AU - Young, Ryan M.
AU - Wu, Yi-Lin
AU - Van Duyne, Richard P
AU - Schatz, George C.
AU - Wasielewski, Michael R.
N1 - Funding Information:
This work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award DE-FG02-99ER14999 (M.R.W., experiments) and by the National Science Foundation under grant no. CHE-1760537 (G.C.S., theory). G.K., R.P.V.D. and G.C.S. acknowledge support from the Air Force Office of Scientific Research MURI (FA9550-14-1-0003, theory).
Funding Information:
This work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award DE-FG02-99ER14999 (M.R.W., experiments) and by the National Science Foundation under grant no. CHE-1760537 (G.C.S., theory). G.K., R.P.V.D., and G.C.S. acknowledge support from the Air Force Office of Scientific Research MURI (FA9550-14-1-0003, theory). We thank Dr. Eileen Foszcz for her assistance with the 100 kHz fsTA measurements.
Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/11/14
Y1 - 2018/11/14
N2 - Singlet fission (SF) in two or more electronically coupled organic chromophores converts a high-energy singlet exciton into two low-energy triplet excitons, which can be used to increase solar cell efficiency. Many known SF chromophores are unsuitable for device applications due to chemical instability and low triplet state energies. The results described here show that efficient SF occurs in polycrystalline thin films of 9,10-bis(phenylethynyl)anthracene (BPEA), a commercial dye that has singlet and triplet energies of 2.40 and 1.11 eV, respectively, in the solid state. BPEA crystallizes into two polymorphs with space groups C2/c and Pbcn, which undergo SF with k SFA = (109 ± 4 ps) â1 and k SFB = (490 ± 10 ps) â1 , respectively. The high triplet energy and efficient SF evidenced from the 180 ± 20% triplet yield make BPEA a promising candidate for enhancing solar cell performance.
AB - Singlet fission (SF) in two or more electronically coupled organic chromophores converts a high-energy singlet exciton into two low-energy triplet excitons, which can be used to increase solar cell efficiency. Many known SF chromophores are unsuitable for device applications due to chemical instability and low triplet state energies. The results described here show that efficient SF occurs in polycrystalline thin films of 9,10-bis(phenylethynyl)anthracene (BPEA), a commercial dye that has singlet and triplet energies of 2.40 and 1.11 eV, respectively, in the solid state. BPEA crystallizes into two polymorphs with space groups C2/c and Pbcn, which undergo SF with k SFA = (109 ± 4 ps) â1 and k SFB = (490 ± 10 ps) â1 , respectively. The high triplet energy and efficient SF evidenced from the 180 ± 20% triplet yield make BPEA a promising candidate for enhancing solar cell performance.
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U2 - 10.1021/jacs.8b07498
DO - 10.1021/jacs.8b07498
M3 - Article
C2 - 30372052
AN - SCOPUS:85056405763
SN - 0002-7863
VL - 140
SP - 15140
EP - 15144
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 45
ER -