摘要
系统研究了系列不同共轭与非共轭水/醇溶聚合物作为界面修饰材料在聚合物发光二极管和聚合物太阳电池中的应用及结构性能关系.研究了界面层厚度,器件金属电极功函对材料界面修饰性能的影响.在此基础上,系统对比研究了共轭与非共轭水/醇溶聚合物界面材料在不同聚合物光电器件中界面修饰性能的差别.内建电势测试与器件研究结果表明,在聚合物发光二极管中,共轭材料表现出明显优于非共轭材料的性能,特别是在超高功函数的金属金电极器件中,共轭的水/醇溶聚合物材料依然表现出很好的电子注入/传输性能;在聚合物太阳电池中,共轭材料的界面修饰性能也优于非共轭类界面修饰材料.
Four different water/alcohol soluble polymers, poly[9,9-bis（6-（N,N-diethylamino）-hexyl N-oxide）fluorene] （PF6NO）, poly[9,9-bis（6-（N,N-diethylamino）-hexyl）fluorene] （PF6N）, polyethylene oxide （PEO）, polyethylene imine （PEI） were used as interlayer materials in polymer light-emitting diodes （PLEDs） and polymer solar cells （PSCs） with device structures of indium tin oxide （ITO）/poly（3,4-ethylenedioxylenethiophene）：poly（styrenesulphonic acid） （PEDOT：PSS）/Active Layer/Interlayer/A1 （or Au）, where the green light-emitting polymer poly-[2-（4-（3＇,7＇-dimethyloctyloxy）-phenyl）-p-phenylene vinylene] （P-PPV） and photovoltaic material poly-[N-9＇-hepta-decanyl-2,7-carbazole-alt-5,5-（4＇,7＇-di-2-thienyl-2＇,l＇,3- benzothiadiazole） （PCDTBT）：[6,6]-phenyl C 71-butyric acid methyl ester （PC71BM） were used as the light emitting layer and light absorption layers for PLEDs and PSCs, respectively. The relationships between chemical structure and optoelectronic properties of the polymer interlayer materials were systematically investigated. Photovoltaic measurement were used to determine the built-in potential across the devices and consequently to understand the interface modification abilities of these materials. It was found that the devices based on conjugated interlayer materials exhibited larger open circuit voltages than those of devices based on non-conjugated interlayer materials, which indicates that the conjugated interlayer materials lead to lower energetic barriers for electron. Device studies showed that the conjugated interlayer materials PF6NO and PF6N exhib- ited much better device performance both in PLEDs and PSCs compared to the non-conjugated interlayer materials PEO and PEI, which was consistent with the photovoltaic measurement results. PLEDs studies indicated that the devices based on non-conjugated interlayer materials PEO and PEI exhibited dramatically decreased efficiencies when the interlayers＇ thick- nesse
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2012年第24期2489-2495,共7页
Acta Chimica Sinica
基金
科技部973计划(Nos.2009CB623601
2009CB930604)
国家自然科学基金(Nos.21125419
50990065
51010003
51073058)
广东省自然科学基金(No.S2012030006232)资助~~
关键词
聚合物发光二极管
聚合物太阳电池
界面材料
水
醇溶聚合物
polymer light-emitting diodes
polymer solar cells
interlayer material
water/alcohol soluble polymer
