Lim Eunhee, Lee Sungkoo, Lee Kyeong K
Korea Institute of Industrial Technology (KITECH), Cheonan-si, Chungnam 331-825, Republic of Korea.
J Nanosci Nanotechnol. 2012 May;12(5):4243-7. doi: 10.1166/jnn.2012.5915.
New conjugated polymers based on benzo[1,2-b:4,5-b']dithiophene, poly(benzo[1,2-b:4,5-b'] dithiophene-alt-bithiophene) (PBT-2T) and poly(benzo[1,2-b:4,5-b']dithiophene-alt-terthiophene) (PBT-3T), have been synthesized via the Stille coupling reaction and their optical and electrochemical properties were characterized by UV-vis, photoluminescence (PL) and cyclic voltammetry (CV) measurements. Compared to PBT-2T, PBT-3T film showed clearly red-shifted UV-visible absorption and PL spectra with maxima at 511 and 653 nm, respectively. Especially, PBT-3T containing terthiophene showed very small optical band gap of 1.65 eV. The PBT-2T and PBT-3T showed the power conversion efficiencies of 0.25% and 0.34%, respectively, under AM 1.5 (100 m/cm2).
基于苯并[1,2 - b:4,5 - b']二噻吩的新型共轭聚合物，聚（苯并[1,2 - b:4,5 - b']二噻吩 - 交替 - 联噻吩）（PBT - 2T）和聚（苯并[1,2 - b:4,5 - b']二噻吩 - 交替 - 三噻吩）（PBT - 3T），已通过Stille偶联反应合成，并通过紫外 - 可见光谱、光致发光（PL）和循环伏安法（CV）测量对其光学和电化学性质进行了表征。与PBT - 2T相比，PBT - 3T薄膜的紫外 - 可见吸收光谱和PL光谱明显红移，其最大值分别在511和653 nm处。特别是，含有三噻吩的PBT - 3T显示出非常小的光学带隙，为1.65 eV。在AM 1.5（100 mW/cm2）条件下，PBT - 2T和PBT - 3T的功率转换效率分别为0.25%和0.34%。
