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Performance improvement cells using bathocuproine of MEH-PPV:PCBM solar and bathophenanthroline as the buffer layers 下载免费PDF全文
In this work, bathocuproine (BCP) and bathophenanthroline (Bphen), commonly used in small-molecule organic solar cells (OSCs), are adopted as the buffer layers to improve the performance of the polymer solar cells (PSCs) based on poly(2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene) (MEH-PPV): [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) bulk heterojunction. By inserting BCP or Bphen between the active layer and the top cathode, all the performance parameters are dramatically improved. The power conversion efficiency is increased by about 70% and 120% with 5-am BCP and 12-nm Bphen layers, respectively, when compared with that of the devices without any buffer layer. The performance enhancement is attributed to BCP or Bphen (i) increasing the optical field, and hence the absorption in the active layer, (ii) effectively blocking the excitons generated in MEH-PPV from quenching at organic/aluminum (Al) interface due to the large band-gap of BCP or Bphen, which results in a significant reduction in series resistance (Rs), and (iii) preventing damage to the active layer during the metal deposition. Compared with the traditional device using LiF as the buffer layer, the BCP-based devices show a comparable efficiency, while the Bphen-based devices show a much larger efficiency. This is due to the higher electron mobility in Bphen than that in BCP, which facilitates the electron transport and extraction through the buffer layer to the cathode. 相似文献
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以Fe+与N2O反应作为第一过渡金属离子与N2O催化循环反应的范例体系.采用密度泛函UB3LYP/6-311+G (2d)方法计算研究第一过渡金属离子Fe+在基态和激发态与N2O反应的反应机理.全参数优化反应势能面上各驻点的几何构型,用频率分析方法和内禀反应坐标(IRC)方法对过渡态进行验证.并用UB3LYP/6-31... 相似文献
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以中国学术期刊网络出版总库为数据源,利用SATI等软件,对2001—2013年我国图书馆数字阅读领域的文献进行计量分析,揭示了数字阅读方面的研究热点、研究期刊和核心作者等内容,为进一步开展相关研究提供参考。 相似文献
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针对医疗康复领域,下肢外骨骼机器人控制策略决定了机器人在运行过程中的安全性、稳定性和快速性,从基于模型的控制策略和受生物启发控制策略两方面简述了下肢外骨骼机器人控制策略研究现状,特别对基于行为的机器人控制和中央模式发生器(central pattern generator,CPG)生物控制作了重点介绍。最后分析了下肢外骨骼机器人控制策略研究趋势并提出基于本体感受的反应式行为控制的智能行为技术。 相似文献
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FOXP3+CD4+CD25+调节性T 细胞(FOXP3+Tregs)负责正常机体免疫稳态的维持。人类许多重大免疫性疾病均与调节性T 细胞的功能异常相关。叉头状家族转录蛋白FOXP3 是调节性T 细胞中特异性表达的关键转录因子,对调节性T 细胞的发育与功能有着重要作用。近年来的研究表明,FOXP3 蛋白转录调控复合体的装配及其翻译后修饰调节对调节性T 细胞的功能至关重要,相关生理过程受到各种炎症微环境的动态调节。深入研究FOXP3+Tregs 活性调节的分子机制将为攻克人类重大免疫及相关性疾病提供创新性线索。 相似文献