Benzodifuran-Based π-Conjugated Copolymers for Bulk Heterojunction Solar Cells
Benzodifuran-Based π-Conjugated Copolymers for Bulk Heterojunction Solar Cells
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DOI：
10.1021/ma101693d
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发表时间：
2010-09
期刊：
影响因子：
5.5
通讯作者：
Hui Li;Peng Jiang;C. Yi;Chen Li;Shi‐Xia Liu;Songting Tan;Bin Zhao;Jörg Braun;W. Meier;T. Wandlowski;S. Decurtins
中科院分区：
文献类型：
--
作者：
Hui Li;Peng Jiang;C. Yi;Chen Li;Shi‐Xia Liu;Songting Tan;Bin Zhao;Jörg Braun;W. Meier;T. Wandlowski;S. Decurtins
通过引入噻吩/苯并[c][1，2，5]噻二唑/9-苯基咔唑共聚单元，合成了一种新型的基于可溶性电活性苯并[1，2-B：4，5-B′]二呋喃（BDF）生色团的π共轭共聚物.这些共聚物覆盖了从250到700 nm的宽吸收范围，具有1.71 - 2.01 eV的窄光学带隙。此外，它们的带隙以及它们的分子电子能级容易通过将BDF核与不同比例的π-共轭给电子或吸电子单元共聚来调节。以该共聚物为电子给体，PCBM（[6，6]-苯基-C61-丁酸甲酯）为电子受体，制备了体异质结太阳能电池。初步研究表明，在AM 1.5照明（100 mW/cm 2）下，功率转换效率为0.17 - 0.59%。
Novel π-conjugated copolymers based on a soluble electroactive benzo[1,2-b:4,5-b′]difuran (BDF) chromophore have been synthesized by the introduction of thiophene/benzo[c][1,2,5]thiadiazole/9-phenylcarbazole comonomer units. These copolymers cover broad absorption ranges from 250 to 700 nm with narrow optical band gaps of 1.71−2.01 eV. Moreover, their band gaps as well as their molecular electronic energy levels are readily tuned by copolymerizing the BDF core with different π-conjugated electron-donating or withdrawing units in different ratios. Bulk heterojunction solar cell devices are fabricated using the copolymers as the electron donor and PCBM ([6,6]-phenyl-C61-butyric acid methyl ester) as the electron acceptor. Preliminary research has revealed power conversion efficiencies of 0.17−0.59% under AM 1.5 illumination (100 mW/cm2).