为了研究二维(2D)共轭结构对苯并[1,2- b:4,5- b]光伏性质的影响设计并合成了基于二呋喃(BDF)的聚合物,这两种低带隙光伏聚合物分别命名为PBDFTT-CF-O和PBDFTT-CF-T。这两种聚合物具有相同的主链和不同的侧基。尽管这两种聚合物显示出相似的光学带隙(约1.5 eV),但具有烷基噻吩侧基的聚合物PBDFTT-CF-T在长波长方向上的吸收性强于具有烷氧基侧基的聚合物PBDFTT-CF-O。同时,由于烷基噻吩基侧基的电子给体能力弱于烷氧基侧基,因此PBDFTT-CF-T的HOMO能级为-5.21 eV,比PBDFTT-CF-O低0.23 eV。PBDFTT-CF-T / PC 71 BM(1:1.5,w / w)混合物的空穴迁移率是0.128 cm 2 V –1 s –1,比PBDFTT-CF-O / PC 71 BM的混合物高1个数量级。密度泛函理论(DFT)模型显
A new building block of benzo[1,2-b:4,5-bâ²]difuran (BDF) was firstly designed and synthesized. The newly designed unit was applied for constructing a new photovoltaic low band gap polymer, PBDFDTBT, which exhibited promising power conversion efficiency of 5.0%.
A new benzo[1,2-b:4,5-b′]difuran-based copolymer for efficient polymer solar cells
作者:Xuewen Chen、Bo Liu、Yingping Zou、Lu Xiao、Xiuping Guo、Yuehui He、Yongfang Li
DOI:10.1039/c2jm32843g
日期:——
A new donorâacceptor type copolymer, namely poly4,8-bis(2-ethylhexyloxy)benzo[1,2-b:3,4-bâ²]difuran-alt-6-octylnaphtho[2,3-c]thiophene-4,9-dione} (PBDFNTDO) was synthesized by a Stille coupling reaction and characterized by 1H NMR, GPC, TGA, UV-Vis absorption spectroscopy and cyclic voltammetry. PBDFNTDO is readily soluble in common organic solvents with a number-average molecular weight (Mn) of 10.7 kDa molâ1 and a polydispersity index of 1.71. TGA analysis shows the copolymer exhibits good thermal stability with 5% weight loss at a temperature of 341 °C. PBDFNTDO possesses a broad absorption band at 300â750 nm with an optical bandgap of 1.65 eV. Cyclic voltammetry gives HOMO and LUMO energy levels of â5.33 eV and â3.40 eV, respectively. The hole mobility of PBDFNTDO:PC71BM (1â:â1.5, w/w) reaches up to 5.0 à 10â3 cm2 Vâ1 sâ1 by the space-charge-limited current (SCLC) method. A polymer solar cell with the configuration of ITO/PEDOT:PSS/PBDFNTDO:PC71BM (1â:â1.5, w/w)/Ca/Al demonstrates a promising power conversion efficiency of 4.71% under the illumination of AM 1.5 G, 100 mW cmâ2.
The impact of thermal treatment on the performance of benzo[1,2-<i>b</i>:4,5-<i>b</i>′]difuran-based organic solar cells
作者:Bo Liu、Xiaobo Wang、Lang Li、Gang Wang
DOI:10.1039/d0ra07415b
日期:——
The new low bandgap benzo[1,2-b:4,5-b′]difuran (BDF)-based organic small molecule, namely B1, was synthesized by Stille coupling polymerization reactions.
Furan Conjugated Polymers Useful for Photovoltaic Applications
申请人:Beaujuge Pierre M.
公开号:US20120085992A1
公开(公告)日:2012-04-12
The present invention provides for a polymer comprising a π-conjugated backbone comprising a furan. The polymer has a narrow or low band gap and/or is solution processable. In some embodiments, the polymer is PDPP2FT or PDPP3F. The present invention also provides for a device comprising the polymer, such as a light-emitting diode, thin-film transistor, chemical biosensor, non-emissive electrochromic, memory device, photovoltaic cells, or the like.