Synthesis and photovoltaic properties of conjugated copolymers bearing planar acenaphtho[1,2-b]quinoxaline moiety with deep HOMO level

Synthesis and photovoltaic properties of conjugated copolymers bearing planar acenaphtho[1,2-b]quinoxaline moiety with deep HOMO level
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深HOMO能级平面苊并[1,2-b]喹喔啉结构共轭共聚物的合成及光伏性能

DOI:
10.1007/s10853-012-6446-7
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发表时间:
2012-04
影响因子:
4.5
通讯作者:
Liu, Yu
Liu, Yu
中科院分区:
材料科学3区
文献类型:
--
作者:
Zou, Yong;Pu, Xuemei;Guan, Zhiqiang;Zhang, Zhanyuan;Huang, Yan;Wang, Nana;Lu, Zhiyun;Jiang, Qing;Yu, Junsheng;Liu, Yu

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通过 Suzuki 或Stille偶联反应。紫外可见吸收和GIXRD表征结果表明,平面DTAQx单元的存在有利于促进固态链间有序堆积,平面给电子苯并[1,2-b: 4,5-b']-二噻吩(BDT)部分的掺入有利于分子自组织。电化学测量结果表明,四种共聚物具有-5.5 ~ -5.6 eV的深HOMO能级。结构为 ITO/PEDOT:PSS(30 nm)/polymer:PCBM (60 nm)/Bphen(10 nm)/Ag(100 nm) 的聚合物太阳能电池,PF-DTAQxasp 型聚合物的 Voc 最高,为 0.84 V,而使用 PBDT-DTAQx 和 PCBM (1:4) 的混合物作为活性材料,获得了 0.9% 的最佳功率转换效率 (PCE)。层。
A series of alternating copolymers (PC-AQx,PT-DTAQx,PC-DTAQx,PF-DTAQx,andPBDT-DTAQx) bearing novel planar acenaphtho[1,2-b]quinoxaline (AQx) or 8,11-di(thiophen- 2-yl)acenaphtho[1,2-b]quinoxaline (DTAQx)-acceptor cores have been synthesized via Suzuki or Stille coupling reactions. UV–vis absorption and GIXRD characterization results indicated that the presence of planar DTAQx unit is favorable for the promotion of well-ordered interchain packing in the solid state, and the incorporation of planar electron-donating benzo[1,2-b: 4,5-b′]-dithiophene (BDT) moiety would be propitious to the molecular self-organization. Electrochemical measurement results suggested that four copolymers possess deep HOMO energy level of −5.5 ~ −5.6 eV. The polymer solar cell with structure of ITO/PEDOT:PSS(30 nm)/polymer:PCBM (60 nm)/Bphen(10 nm)/Ag(100 nm) exhibited the highestVocof 0.84 V withPF-DTAQxasp-type polymer, while the best power conversion efficiency (PCE) of 0.9 % was obtained using a blend ofPBDT-DTAQxand PCBM (1:4) as active layer.
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