Electronic and Optical Functionality and Photovoltaic Application of Conducting Polymer-Fullerene-Nanotube Composite

导电聚合物-富勒烯-纳米管复合材料的电子光学功能及光伏应用

• 批准号: 14205046
• 负责人: YOSHINO Katsumi
• 金额: $ 34.69万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14205046/
• 关键词: conducting polymer; fullerene; photo-induced charge transfer; carbon nanotube; photo-electrical conversion; nonlinear photoconduction; solar cell; C_<60>; 光電変換素子; フォトダイオード

Photo-excitation dynamics and interactions between polarons in concucting polymers and its interaction with fullerene and carbon nanotube have been studied, and highly efficient photovoltaic properties and novel functionality have been investigated.Composite systems of conducting polymers doped with fullerene and nanotube have been prepared, and their ground state and photo-excited state have been discussed from the results of optical and electrical properties. Utilizing substituted fullerenes and an endohedral metallofullerene, the efficient photo-induced charge transfer could be observed in the molecular systems with conducting polymers, and the photovoltaic properties depending on the substituents of fullerene have been found.Kinetics of decay of polaron pairs as precursors of free charge carriers at photoexcitation of poly(3-octylthiophene) under applied electrical field have been observed directly within a picosecond time domain by using the two-correlated-pulse laser technique. E … More xperiments have shown that polaron pairs were generated without any noticeable delay after the light absorption. At high enough excitation intensity, free charge carriers have been shown to take part in the second-order processes photocurrent produced by the recombination of two neighboring polaron pairs. It has been clarified that polaron pairs with two kinds of lifetimes exist and the decay time decreases by high electrical field strength, and that polaron pair is the main origin of the second-order photocurrent. The direct observation of photoluminescence within a picosecond time domain has been also discussed.Photovoltaic properties of a photovoltaic cell with a fullerene/conducting polymer heterojunction in the photovoltaic cell fabricated by spin-coating the solution of conducting polymer onto the fullerene thin film formed on ITO. Fabricated by this process, the photovoltaic cell has demonstrated the high efficiency for solar cells based on conducting polymers. From the optical properties of fullerene/conducting polymer heterojunction and the direct surface observation by using scanning electron microscope and atmic force microscope, it has been clarified that the interpenetrating interface of fullerene and conducting polymer contributes to the high photovoltaic performance.Surface morphology of fullerene films fabricated by vacuum deposition was modified by a spin-cast treatment process with various organic solvents used in the, and a nano-rod-shape surface has been obtained in the case of spin-cast treatment with trans-1,2-dichroloethylene. The field emission properties of fullerene films, the surface of which were modified, have been found to depend on the surface morphology. Less

研究了导电聚合物的光激发动力学、极化子之间的相互作用及其与富勒烯和碳纳米管的相互作用，研究了富勒烯和碳纳米管的高效光伏性能和新的功能。制备了富勒烯和纳米管掺杂的导电聚合物复合体系，并从光学和电学性质的结果讨论了它们的基态和光激发态。利用取代富勒烯和面内金属富勒烯，可以在导电聚合物分子体系中观察到有效的光致电荷转移，并发现了富勒烯取代基对的光伏性质。利用双关联脉冲激光技术，在皮秒的时间域内，直接观察到作为自由载流子前体的极化子对在外加电场作用下的衰减动力学。E…更多的实验表明，极化子对的产生在光吸收后没有任何明显的延迟。在足够高的激发强度下，自由载流子参与了两个相邻极化子对复合产生的二级光电流过程。结果表明，存在两种不同寿命的极化子对，其衰变时间随电场强度的增大而减小，极化子对是二阶光电流的主要来源。还讨论了在皮秒时间域内直接观测光致发光的方法。将导电聚合物溶液旋涂在ITO上形成的富勒烯薄膜上，制备了富勒烯/导电聚合物异质结光伏电池的光伏特性。用这种工艺制作的光伏电池已经证明了基于导电聚合物的太阳能电池的高效率。从富勒烯/导电聚合物异质结的光学性质和扫描电子显微镜和原子力显微镜的直接表面观察，阐明了富勒烯与导电聚合物的互穿界面有助于获得高的光伏性能。用不同的有机溶剂对真空沉积法制备的富勒烯薄膜的表面形貌进行了修饰，并在用反式-1，2-二氯乙烯旋转浇铸处理的情况下得到了纳米棒状表面。表面修饰后的富勒烯薄膜的场发射性能与其表面形貌有关。较少

项目成果

Properties of Polaron Pairs in Conjugated Polymers Studied by Two-Correlated-Pulses Technique

双相关脉冲技术研究共轭聚合物中极化子对的性质

• 发表时间: 2004
• 期刊: Journal of the Physical Society of Japan 73
• 作者: T.Shirakawa et al.;A.Fujii et al.;榎本友樹ら;T.Umeda et al.;A.Fujii et al.;Y.Nishihara et al.
• 通讯作者: Y.Nishihara et al.

吉野勝美: "ナノ・IT時代の分子機能材料と素子開発"株式会社エヌ・ティー・エス. 771 (2004)

吉野胜美：“纳米 IT 时代的分子功能材料和器件开发”NTS 771 (2004)。

Effect of ZnO layer on characteristics of conducting polymer/C60 photovoltaic cell

• DOI: 10.1088/0022-3727/37/6/007
• 发表时间: 2004-02
• 期刊: Journal of Physics D
• 作者: T. Shirakawa;Tokiyoshi Umeda;Y. Hashimoto;A. Fujii;K. Yoshino

S.Nespurek et al.: "Origin of Broad Visible Luminescence in Poly [methyl(phenyl)silylene] Thin Films"Journal of Luminescence. 99. 131-140 (2002)

S.Nespurek 等人：“聚[甲基(苯基)亚硅基]薄膜中广泛可见光的起源”发光杂志。

R.Hidayat: "Time-resolved Optical and Electrical Study of Second-order Processes Responsible for the Formation of Free Polarons in Conjugated Polymers"Physical Review B. 66. 075214-1-075214-7 (2002)

R.Hidayat：“负责在共轭聚合物中形成自由极化子的二阶过程的时间分辨光学和电学研究”物理评论 B.66.075214-1-075214-7 (2002)