TY - JOUR
T1 - An Electron Acceptor with Broad Visible–NIR Absorption and Unique Solid State Packing for As-Cast High Performance Binary Organic Solar Cells
AU - Shi, Xueliang
AU - Liao, Xunfan
AU - Gao, Ke
AU - Zuo, Lijian
AU - Chen, Jingde
AU - Zhao, Jingbo
AU - Liu, Feng
AU - Chen, Yiwang
AU - Jen, Alex K.-Y.
PY - 2018/8/15
Y1 - 2018/8/15
N2 - A novel acceptor–donor–acceptor (A–D–A) type electron acceptor 6TIC-4F with terthieno[3,2-b]thiophene (6T) as the core unit is rationally designed and synthesized, which exhibits an extraordinarily narrow bandgap (≈1.24 eV) and strong absorption between 650 and 1000 nm. X-ray crystallographic analysis reveals that it has unique intermolecular π–π stacking. The solar cells based on the as-cast poly[(2,6-(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)-benzo[1,2-b:4,5-b′]dithiophene))-alt-(5,5-(1′,3′-di-2-thienyl-5′,7′-bis(2-ethylhexyl)benzo[1′,2′-c:4′,5′-c′]dithiophene-4,8-dione))]) (PBDB-T):6TIC-4F binary blends exhibit an excellent power conversion efficiency (PCE) of 11.14% with a high JSC of 23.00 mA cm−2, and a high fill factor of 0.67, which represents one of the best PCE values for low bandgap (Eg < 1.3 eV)–based organic solar cells.
AB - A novel acceptor–donor–acceptor (A–D–A) type electron acceptor 6TIC-4F with terthieno[3,2-b]thiophene (6T) as the core unit is rationally designed and synthesized, which exhibits an extraordinarily narrow bandgap (≈1.24 eV) and strong absorption between 650 and 1000 nm. X-ray crystallographic analysis reveals that it has unique intermolecular π–π stacking. The solar cells based on the as-cast poly[(2,6-(4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)-benzo[1,2-b:4,5-b′]dithiophene))-alt-(5,5-(1′,3′-di-2-thienyl-5′,7′-bis(2-ethylhexyl)benzo[1′,2′-c:4′,5′-c′]dithiophene-4,8-dione))]) (PBDB-T):6TIC-4F binary blends exhibit an excellent power conversion efficiency (PCE) of 11.14% with a high JSC of 23.00 mA cm−2, and a high fill factor of 0.67, which represents one of the best PCE values for low bandgap (Eg < 1.3 eV)–based organic solar cells.
KW - near-infrared semiconductors
KW - nonfullerene acceptors
KW - organic solar cells
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=85051481674&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85051481674&origin=recordpage
U2 - 10.1002/adfm.201802324
DO - 10.1002/adfm.201802324
M3 - RGC 21 - Publication in refereed journal
SN - 1616-301X
VL - 28
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 33
M1 - 1802324
ER -
