Thiadiazole quinoxaline-based copolymers with ∼1.0 eV bandgap for ternary polymer solar cells
摘要:
A new strong electron-deficient acceptor unit, 4,9-bis(5-bromothiophen-2-yl)-6,7-bis(5-dodecylthiophen-2-yl)-[1,2,5]thiadiazolo[3,4-g]quinoxaline (TQxT), is designed. Three TQxT based new conjugated polymers have been further developed by alternating with benzo[1,2-b:4,5-b']dithiophene or naphtho[1,2-b:5,6-b']difuran. Featuring ultra low bandgaps of 1.03-1.10 eV, these polymers exhibit absorption spectra beyond near-infrared (NIR) region. The polymer: PC71BM (1:2) solar cells deliver a best power conversion efficiency (PCE) of 0.43%. The doping of 9 wt% PBDTT-TQxP into P3HT:PC71BM (1:2) blend, however, leads to a highest PCE of 3.58% for the resultant ternary solar cells, corresponding to similar to 22% improvement in comparison to 2.93% PCE for P3HT:PC71BM binary cells. (C) 2015 Elsevier Ltd. All rights reserved.
Benzodifuran and benzodithiophene donor–acceptor polymers for bulk heterojunction solar cells
作者:Peishen Huang、Jia Du、Samodha S. Gunathilake、Elizabeth A. Rainbolt、John W. Murphy、Kevin T. Black、Diego Barrera、Julia W. P. Hsu、Bruce E. Gnade、Mihaela C. Stefan、Michael C. Biewer
DOI:10.1039/c5ta00936g
日期:——
used as the acceptor building block. A systematic study was performed to determine the influence of the combinations of different heteroatoms in the donor–acceptor copolymer. In bulkheterojunctionsolarcells, the polymer with all furan building blocks in the electron donating units, poly[(4,8-bis(5-dodecyl-2-furanyl)benzo[1,2-b:4,5-b′]difuran-2-yl)-alt-(2-ethyl-1-(3-fluorothieno[3,4-b]thiophen-2-yl)-1-hexanone)]
以苯并[1,2- b:4,5- b ']二噻吩和苯并[1,2- b:4,5- b ']二呋喃为噻吩并噻吩并[3,3] ,合成了四种新的供体-受体共聚物。将4- b ]噻吩用作受体构件。进行了系统的研究,以确定供体-受体共聚物中不同杂原子组合的影响。在本体异质结太阳能电池中,在给电子单元中具有所有呋喃结构单元的聚合物聚[(4,8-双(5-十二烷基-2-呋喃基)苯并[1,2- b:4,5- b ' ]二呋喃-2-基) - ALT - (2-乙基-1-(-3-氟[3,4 b ]噻吩-2-基)-1-己酮)](P4)(M n = 66.7 kDa),实现了5.23%的最高功率转换效率。
Benzodithiophene homopolymers synthesized by Grignard metathesis (GRIM) and Stille coupling polymerizations
作者:Harsha D. Magurudeniya、Ruvini S. Kularatne、Elizabeth A. Rainbolt、Mahesh P. Bhatt、John W. Murphy、Elena E. Sheina、Bruce E. Gnade、Michael C. Biewer、Mihaela C. Stefan
DOI:10.1039/c4ta01739k
日期:——
Poly4,8-bis(95-dodecylthiophene-2-yl)benzo[1,2-b:4,5-b′]dithiophene} has been synthesized by both Grignard metathesis (P1) and Stille coupling polymerizations (P2). Polymers P1 and P2 were characterized and their optoelectronic properties, charge carrier mobilities, and photovoltaic properties were compared. The field-effect mobilities of the polymers were measured on both untreated and heptadecafluoro-1
聚4,8-双(95-十二烷基噻吩-2-基)苯并[1,2- b:4,5- b ']二噻吩}已通过格利雅(Grignard)复分解(P1)和Stille偶联聚合(P2)合成。对聚合物P1和P2进行了表征,并比较了它们的光电性能,电荷载流子迁移率和光伏性能。聚合物的场效应迁移率是在未处理的和七氟-1,1,2,2-四氢癸基-1-三甲氧基硅烷(FS)处理的有机场效应晶体管(OFET)器件上测量的。还用[6,6]-苯基-C 71-丁酸甲酯(PC 71)在本体异质结(BHJ)太阳能电池中对聚合物进行了评估。BM)作为接受者。
Novel Benzo[1,2-<i>b</i>:4,5-<i>b</i>′]dithiophene-Benzothiadiazole Derivatives with Variable Side Chains for High-Performance Solar Cells
作者:Qiang Peng、Xiangju Liu、Dan Su、Guanwen Fu、Jun Xu、Liming Dai
DOI:10.1002/adma.201101933
日期:2011.10.18
bandgap copolymers are prepared by incorporating thiophene‐modified benzo[1,2‐b:4,5‐b′]dithiophene and alkyloxy or fluorine‐modified benzothiadiazole as donor and acceptor units. These copolymers exhibit a high open‐circuit voltage and short‐circuit current density. Good power conversion efficiencies are demonstrated in solarcell studies, indicating their promising photovoltaic application as donor
低带隙共聚物是通过结合噻吩改性的苯并[1,2- b:4,5- b ']二噻吩和烷氧基或氟改性的苯并噻二唑作为供体和受体单元而制备的。这些共聚物表现出高的开路电压和短路电流密度。太阳能电池研究证明了良好的功率转换效率,表明它们有希望将光伏技术用作施主材料。