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。
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) thieno[3,2-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%.
出处
《兰州石化职业技术学院学报》
2014年第2期6-10,共5页
Journal of Lanzhou Petrochemical Polytechnic