机构地区: 华南理工大学材料科学与工程学院材料科学研究所
出 处: 《材料研究与应用》 2010年第4期268-272,共5页
摘 要: 为了研究和开发新型有机光伏材料以及提高有机光伏器件的光电转换效率,我们设计、合成了新型齐聚噻吩衍生物:5-氰基-2,2′:5′,2″-三噻吩(3T-CN)、5,5″-二氰基-2,2′:5′,2″-三噻吩(3T-2CN)、5-氰基-2,2′:5′,2″:5″,2″′-四噻吩(4T-CN)、5,5″′-二氰基-2,2′:5′,2″:5″,2″′-四噻吩(4T-2CN)、2,3,4,5-四噻吩基噻吩(XT)和2,5-(5′-氰基)噻吩基-3,4-噻吩基-噻吩(XT-2CN).以3T-CN、3T-2CN、4T-CN、4T-2CN、XT和XT-2CN分别作为电子给体材料,3,4,9,10-二萘嵌苯四甲酸二酐(PTCDA)作为电子受体材料,组装了p-n异质结有机光伏器件,器件结构为:ITO/齐聚噻吩衍生物/PTCDA/Al,对这些器件的光伏性能进行了研究.研究发现,以3T-CN、3T-2CN、4T-CN、4T-2CN、XT和XT-2CN分别作为电子给体材料的有机光伏器件的光电转换效率分别为:1.51%,2.24%,2.10%,2.74%,0.58%和0.65%.电子给体材料中-CN基团的引入可以提高器件的光电转换效率. For the purpose of developing novel photovoltaic materials and organic photovoltaic devices with good performance characteristics,5-cyano-2,2':5',2″-terthiophene (3T-CN),5,5″-dicyano-2,2':5',2″-terthiophene (3T-2CN),5-cyano-2,2':5',2″:5″,2″'-tetrathiophene (4T-CN),5,5″'-bicyano-2,2':5',2″:5″,2″'-quaterthiophene (4T-2CN),2,3,4,5-tetrath-iopenyl-thiophene (XT) and 2,5(5'-cyano-thiopenyl)-3,4-terthio-penyl-thiophene(XT-2CN) were synthesized. The photovoltaic devices were fabricated using 3T-CN,3T-2CN,4T-CN,4T-2CN,XT,XT-2CN and 3,4,9,10-perylenetertracarboxylic dianhydride (PTCDA). The Photo-electric conversion efficiency based on 3T-CN,3T-2CN,4T-CN,4T-2CN,XT,XT-2CN were 1.51%,2.24%,2.10%,2.74%,0.58% and 0.65%,respectively. The -CN group played an important role in increasing the conversion efficiency.
领 域: [电气工程]