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用于太阳能电池的(噻吩-苯-噻吩)基窄带隙聚合物的性能研究
引用本文:苏雪花,李薇,王守伟.用于太阳能电池的(噻吩-苯-噻吩)基窄带隙聚合物的性能研究[J].兰州石化职业技术学院学报,2014(2):6-10.
作者姓名:苏雪花  李薇  王守伟
作者单位:兰州石化职业技术学院石油化学工程系,兰州甘肃730060
摘    要:采用Stilling偶合反应合成了噻吩-苯-噻吩和2,5-二(三甲基锡)基噻并3,2-b]噻吩窄带隙交替共轭聚合物PTPT-bT(Eg=2.03eV)。所得聚合物具有良好的热稳定性、溶解性及成膜性能。共聚物在四氢呋喃中和固体薄膜中的光致发光发射峰分别为566nm和583nm。最高占有分子轨道(HOMO)和最低未占有分子轨道(LUMO)值分别为-5.29eV和-3.01eV。在模拟太阳光照AM1.5(89mW·cm-2)下,基于PTPT-bT:PC70BM(1:4)共混膜的光伏器件的光电转换效率(PCE)为2.99%,开路电压(Voc)为0.80V,短路电流(Jsc)为6.97mA/cm2,填充因子为0.48。

关 键 词:共轭聚合物  窄带隙  太阳能电池材料

Characterization of Narrow Band-gap Polymers Based on thiophene-phenylene-thiophene for Photovolatic Cells
SU Xue-hua,LI Wei,WANG Shou-wei.Characterization of Narrow Band-gap Polymers Based on thiophene-phenylene-thiophene for Photovolatic Cells[J].Journal of Lanzhou Petrochemical Vocational College of Technology,2014(2):6-10.
Authors:SU Xue-hua  LI Wei  WANG Shou-wei
Institution:(Department of Petrochemical Engineering, Lanzhou Petrochemical College of Vocational Technology, Lanzhou 730060, China)
Abstract:The alternating narrow band -gap conjugated polymer PTPT -bT (Eg =2.03eV) is synthesized, which derived from thiophene -phenylene-thiophene and 2, 5-bis (trimethylstannyl) thieno3,2-b] thionphene by Stilling coupling reaction .In THF solution and solid thin film , PL emission peaks of the copolymer are around 566nm and 583nm respectively.The values of highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) are -5.29eV and -3.01eV respectively.Under AM 1.5 simulator (89mW· cm-2), the photovotaic devices based on PTPT -bT:PC70 BM(1:2) blend ITO/PEDOT:PSS/PTPT-bT:PC70 BM/Ba/Al show power conversion efficiency (PCE) of 2.99%, an open circuit voltage(Voc) of 0.80 V, a short circuit cur-rent (Isc) of 6.97mA/cm2 and a fill factor (FF) of 48%.
Keywords:conjugated polymers  narrow band-gap  solar cells
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