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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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多吡啶钌染料和有机染料共染色的钴基敏化太阳电池
DOI: 10.3724/SP.J.1105.2013.12406, PP. 619-625
Keywords: 太阳电池,染料,电荷转移,界面微结构
Abstract:
具有低费米能级的外球电子媒介体的开发带来了染料敏化太阳电池性能的重大进展.针对这种快复合器件,通过精细的调控二氧化钛表面的染料包覆层结构来有效抑制界面电荷复合是目前该领域的一个重要研究主题.在本文中,利用高吸收系数的多吡啶钌染料与具有三维立体结构的有机给受体染料对二氧化钛薄膜进行共染色.基于邻菲罗啉钴氧化还原电对,相对于纯钌基染料染色的器件,瞬态吸收与瞬态光电压衰减测试表明具有三维立体结构的有机染料的引入不仅提高了电子注入效率,还同时减慢了二氧化钛中的电子与氧化态染料及电解质中的电子受体之间的复合反应速率,使器件开路电压从808mV提升到883mV.这种界面光活性层微结构变化诱导的电子注入效率的改善和电荷复合的减慢还过补偿了因薄膜光吸收减弱带来的不利影响,获得了更大的光电流输出,在模拟AM1.5太阳光辐照条件下器件功率转换效率从8.5%提升到10.3%.
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