10.1021/acs.chemmater.8b05047.s001
Jianfei Qu
Jianfei
Qu
Qiaoqiao Zhao
Qiaoqiao
Zhao
Jiadong Zhou
Jiadong
Zhou
Hanjian Lai
Hanjian
Lai
Tao Liu
Tao
Liu
Duning Li
Duning
Li
Wei Chen
Wei
Chen
Zengqi Xie
Zengqi
Xie
Feng He
Feng
He
Multiple Fused Ring-Based Near-Infrared Nonfullerene
Acceptors with an Interpenetrated Charge-Transfer Network
American Chemical Society
2019
Interpenetrated Charge-Transfer Network
12- ring-fused cores
PBDB-T polymer donor
R 10-4Cl films
R 10-4Cl devices show
Multiple Fused Ring-Based Near-Infrared Nonfullerene Acceptors
R 10-4Cl device
R 10-4Cl
Å.
type
interpenetrated charge transfer
SC
interpenetrated network structure
molecule
end groups
IC
2019-02-12 15:37:18
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Multiple_Fused_Ring-Based_Near-Infrared_Nonfullerene_Acceptors_with_an_Interpenetrated_Charge-Transfer_Network/7707740
Two
small molecule acceptors with chlorinated IC as end groups
and 10-ring- and 12-ring-fused cores as central units, named R10-4Cl
and R12-4Cl, were designed and synthesized, which exhibit low optical
band gaps of 1.43 and 1.35 eV, respectively. X-ray crystallographic
analysis of R10-4Cl shows that the end groups of adjacent molecules
are parallel and partially overlap with a short π–π
distance of 3.32 Å, which is helpful for electron transport in
this direction. At the same time, there is another type of molecular
orientation that lies in these two molecules with an angle about 64.7°
because of the close contact of S···O with a distance
of 3.15 Å. The two types of molecular arrangements result in
an interpenetrated network structure in R10-4Cl films, which is helpful
for the rapid charge transfer either along the horizontal direction
or the sloping direction. After blending with a PBDB-T polymer donor,
the R10-4Cl-based device shows wide photocurrent response from the
visible to near-infrared regions, resulting in the better usage of
the sunlight source. Benefited from this comprehensive solar energy
absorption and the interpenetrated charge transfer, the R10-4Cl-based
devices show a power conversion up to 10.7% with an improved <i>J</i><sub>SC</sub> of 18.9 mA cm<sup>–2</sup>.