Synthesis and Characterization of Dioctyloxybenzo[1,2-b:4,3-b′]dithiophene-Containing Copolymers for Polymer Solar Cells
摘要:
A series of D-A copolymers containing dioctyloxybenzo[1,2-b:4,3-b']dithiophene (BdT) donor unit and different acceptor unit of bithiazole (BTz), thiazolo[5,4-d]-thiazole (TTz), dithienylylbenzothiadiazole (DTBT), and dithienyl-pyrrolo[3,4-c]pyrrole-1,4-dione (DPP), PBdT-BTz, PBdT-TTz, PBdT-DTBT, and PBdT-DPP, were synthesized for the application as donor materials in polymer solar cells (PSCs). Bandgaps and HOMO (the highest occupied molecular orbital) energy levels of the copolymers were tuned effectively by using different acceptor units from 2.01 and -5.16 eV for PBdT-BTz, to 1.91 and -5.19 eV for PBdT-TTz, 1.70 and -5.09 eV for PBdT-DTBT, and 1.41 and -5.01 eV for PBdT-DPP. The PSCs based on the blend of PBdT-TTz (with a lower HOMO of -5.19 eV) and PC70BM (1:3 w/w) exhibited a power conversion efficiency of 3.40% with a J(sc) of 5.50 mA/cm(2), a high V-oc of 0.90 V, and a high FF of 68.7%.
Interchain interactions in poly(benzo[1,2-b:4,3-b′]dithiophene)s and the effect of substituents on aggregation
作者:Robert N. Brookins、Erik Berda、John R. Reynolds
DOI:10.1039/b820002e
日期:——
Two poly(benzo[1,2-b:4,3-bâ²]dithiophene)s [PBDTs] with linear and branched substituents have been synthesized as freely soluble polymers using Colon/Kelsey and Suzuki polymerizations (Mn = 6.6â12.7 kDa, DP: 15â29). Polymers with linear substituents show effects due to increased polymer aggregation as evidenced bathochromic spectral bands. The electrochemical results also show the influence of interchain interactions where the aggregate of the linear derivative has oxidative processes at 0.5 V lower potentials than the branched derivative.
Synthesis and Characterization of Dioctyloxybenzo[1,2-<i>b</i>:4,3-<i>b</i>′]dithiophene-Containing Copolymers for Polymer Solar Cells
作者:Maojie Zhang、Yeping Sun、Xia Guo、Chaohua Cui、Youjun He、Yongfang Li
DOI:10.1021/ma201565f
日期:2011.10.11
A series of D-A copolymers containing dioctyloxybenzo[1,2-b:4,3-b']dithiophene (BdT) donor unit and different acceptor unit of bithiazole (BTz), thiazolo[5,4-d]-thiazole (TTz), dithienylylbenzothiadiazole (DTBT), and dithienyl-pyrrolo[3,4-c]pyrrole-1,4-dione (DPP), PBdT-BTz, PBdT-TTz, PBdT-DTBT, and PBdT-DPP, were synthesized for the application as donor materials in polymer solar cells (PSCs). Bandgaps and HOMO (the highest occupied molecular orbital) energy levels of the copolymers were tuned effectively by using different acceptor units from 2.01 and -5.16 eV for PBdT-BTz, to 1.91 and -5.19 eV for PBdT-TTz, 1.70 and -5.09 eV for PBdT-DTBT, and 1.41 and -5.01 eV for PBdT-DPP. The PSCs based on the blend of PBdT-TTz (with a lower HOMO of -5.19 eV) and PC70BM (1:3 w/w) exhibited a power conversion efficiency of 3.40% with a J(sc) of 5.50 mA/cm(2), a high V-oc of 0.90 V, and a high FF of 68.7%.