TY - JOUR
T1 - Effects of a heteroatomic benzothienothiophenedione acceptor on the properties of a series of wide-bandgap photovoltaic polymers
AU - Huang, Xinxin
AU - Weng, Kangkang
AU - Huo, Lijun
AU - Fan, Bingbing
AU - Yang, Chunhe
AU - Sun, Xiaobo
AU - Sun, Yanming
N1 - Publisher Copyright:
© 2016 The Royal Society of Chemistry.
PY - 2016
Y1 - 2016
N2 - A series of benzodithiophene (BDT) and benzothienothiophenedione (BTTDO) alternating wide-bandgap (WBG) copolymers, PBDT-O1, PBDT-S1 and PBDT-Se1, were designed and synthesized, in which heteroatoms (O, S and Se) were incorporated into the electron-deficient BTTDO motif. The effect of heteroatoms on the thermal stability, absorption spectra, energy level, charge carrier mobility, and photovoltaic properties of these WBG polymers was systematically studied. The results indicated that upon increasing the size of the heteroatoms, the maximum absorption peaks were red-shifted and the optical bandgap decreased. Solar cells with a conventional structure of ITO/PEDOT:PSS/polymers:PC70BM (1:1, w/w)/Ca/Al were fabricated. Among the three polymers, PBDT-S1 achieved the best photovoltaic performance, with a high power conversion efficiency (PCE) of 9.0%, with an open-circuit voltage (Voc) of 0.91 V, a short-circuit current (Jsc) of 12.99 mA cm-2, and an unprecedented fill factor (FF) of 74.9%.
AB - A series of benzodithiophene (BDT) and benzothienothiophenedione (BTTDO) alternating wide-bandgap (WBG) copolymers, PBDT-O1, PBDT-S1 and PBDT-Se1, were designed and synthesized, in which heteroatoms (O, S and Se) were incorporated into the electron-deficient BTTDO motif. The effect of heteroatoms on the thermal stability, absorption spectra, energy level, charge carrier mobility, and photovoltaic properties of these WBG polymers was systematically studied. The results indicated that upon increasing the size of the heteroatoms, the maximum absorption peaks were red-shifted and the optical bandgap decreased. Solar cells with a conventional structure of ITO/PEDOT:PSS/polymers:PC70BM (1:1, w/w)/Ca/Al were fabricated. Among the three polymers, PBDT-S1 achieved the best photovoltaic performance, with a high power conversion efficiency (PCE) of 9.0%, with an open-circuit voltage (Voc) of 0.91 V, a short-circuit current (Jsc) of 12.99 mA cm-2, and an unprecedented fill factor (FF) of 74.9%.
UR - http://www.scopus.com/inward/record.url?scp=84989306549&partnerID=8YFLogxK
U2 - 10.1039/c6tc02915a
DO - 10.1039/c6tc02915a
M3 - Article
AN - SCOPUS:84989306549
SN - 2050-7526
VL - 4
SP - 9052
EP - 9059
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 38
ER -
