All-Polymer Solar Cells Based on Fully Conjugated Block Copolymers Composed of Poly(3-hexylthiophene) and Poly(naphthalene bisimide) Segments
All-Polymer Solar Cells Based on Fully Conjugated Block Copolymers Composed of Poly(3-hexylthiophene) and Poly(naphthalene bisimide) Segments
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DOI：
10.1021/ma302170e
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发表时间：
2012-12
期刊：
影响因子：
5.5
通讯作者：
Kazuhiro Nakabayashi;H. Mori
中科院分区：
文献类型：
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作者：
Kazuhiro Nakabayashi;H. Mori
采用准活格氏复分解聚合和山本偶联反应合成了由聚3-己基噻吩和聚萘二酰亚胺段组成的全共轭给受体嵌段共聚物p3ht - pnbi - p3ht。P3HT-PNBI-P3HT薄膜在350 ~ 850 nm范围内具有较宽的吸收，对应于光带隙为1.46 eV。此外，热退火后的光学带隙减小到1.38 eV（光吸收带扩展到893 nm），远小于先前报道的供体-受体嵌段共聚物（1.6 ~ 1.8 eV）。经退火的P3HT:P3HT- pnbi -P3HT共混膜（重量比为1:1）在350 ~ 950 nm范围内也表现出较宽的吸收。循环伏安法表明，P3HT-PNBI-P3HT薄膜具有源自P3HT和PNBI段的氧化和还原特性。HOMO和LUMO能级分别在5.57 ~ 5.60 eV和4.22 ~ 4.27 eV之间。全聚合物太阳能电池使用…
Fully conjugated donor–acceptor block copolymers composed of poly(3-hexylthiophene) and poly(naphthalene bisimide) segments, P3HT-PNBI-P3HTs, were synthesized using quasi-living Grignard metathesis polymerization and the Yamamoto coupling reaction. Broad absorption in a range of 350–850 nm, which corresponded to the optical band gap of 1.46 eV, was observed for the P3HT-PNBI-P3HT thin films. In addition, the optical band gap decreased to 1.38 eV (the light absorption band extended to 893 nm) by thermal annealing, which was much smaller than those of previously reported donor–acceptor block copolymers (1.6–1.8 eV). The annealed P3HT:P3HT-PNBI-P3HT blend film (1:1 by weight) also exhibited broad absorption in the range of 350–950 nm. Cyclic voltammetry demonstrated that the P3HT-PNBI-P3HT thin films exhibited the oxidation and reduction properties derived from the P3HT and PNBI segments. The HOMO and LUMO levels were in the range of 5.57–5.60 and 4.22–4.27 eV, respectively. All-polymer solar cells using the...