Citation: Xing Xu, Hao Chen, Xian Rong Cai, Ying Li, Qing Jiang. Synthesis and properties of polyfluorene copolymers bearing thiophene and porphyrin[J]. Chinese Chemical Letters, ;2007, 18(7): 879-882. doi: 10.1016/j.cclet.2007.05.040 shu

Synthesis and properties of polyfluorene copolymers bearing thiophene and porphyrin

College of Chemistry, Sichuan University, Chengdu 610064, China

Received Date: 2 March 2007

Fund Project: This work was supported by the Key Foundation of Education Ministry of China (No. 105142).

To search for more wider absorption and higher charge carriers mobilities materials of polymer solar cell, a series of soluble alternating polyfluorene copolymers were synthesized by palladium-catalyzed Suzuki coupling reaction. Their structures were determined by ¹H NMR, IR and UV-vis. And their UV-vis absorption spectra indicated that they had strong absorption over 600 nm spectral range and nearly cover 400-700 nm visible region. The band gaps of copolymers calculated according to cyclic voltammetry (CV) were between 1.96 and 2.03 eV. Polymer:TiO₂ bulk-heterojunction films were made from mixtures of polymer and titanium isopropoxide, a precursor for TiO₂, via hydrolysis in air overnight. The photoluminescence at 380-800 nm of the blend film of PT-TPP20(5 mg/mL):Ti(OC₃H₇)₄ (80 μL/mL) (20% volume fraction) was significantly quenched in the 50% Ti(OC₃H₇)₄ blend film, indicating that rapid and efficient separation of photoinduced electron-hole pairs.
- Polyfluorene copolymers,
- Synthesis,
- Absorption,
- Bulk-heterojunction
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