Fullerene-based nano-structured materials and solar cells

富勒烯基纳米结构材料和太阳能电池

基本信息

批准号：
15360175
负责人：
KOJIMA Nobuaki
金额：
$ 5.06万
依托单位：
Toyota Technological Institute
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15360175/
关键词：
fullerene superlattice structure nano-structure solar cell amorphous carbon phthalocyanine carbon hydrogen radical 光起電力薄膜

项目摘要

The aim of this research is (1)development of structure control technique of C_<60>/a-C superlattice structures, (2)characterization of optical and electrical properties of the superlattice structures for solar cell applications, (3) basic investigation of organic solar cells using C_<60>-based nano-structures.1.a-C layer was formed by the irradiation of nitrogen radicals from rf plasma source onto C_<60> layer. We found that the character of the resulted a-C films depended on the flux of nitrogen ions.2.We observed the blue shift of light absorption edge in C_<60>/a-C superlattice structures with the thinner a-C well thickness, and suggested that the effective band gap energy could be controlled by the superlattice structure.3.The solar cells with _C_<60>/a-C superlattice structure as i-layer sandwiched between p-a-SiC and n-a-Si were fabricated. The cell showed low efficiency of 10^<-6>-10^<-5>%. To increase the cell efficiency, the conductivity control by impurity doping and the reduction of defect density in a-C layer are necessary.4.Mg-doping in C_<60> films was investigated to control the conductivity. The resistivity of Mg-doped C_<60> films deposited by the co-evaporation method reduced in 6 orders of magnitude.5.The hydrogen treatment of a-C films was investigated to reduce defect density. ESR spin defect density much depended on the hydrogen treatment time, which was necessary to optimize.6.The C_<60>/organic molecules hetero interface was investigated for organic solar cells using C_<60>-based nano-structures. It was confirmed that Copper-Phthalocyanine was deposited with standing molecular plane onto the C_<60>(111) surface.

本研究的目的是（1）开发C_<60>/a-C超晶格结构的结构控制技术，（2）表征用于太阳能电池应用的超晶格结构的光学和电学性质，（3）有机太阳能的基础研究使用C_<60>基纳米结构的电池。1.a-C层是通过将来自射频等离子体源的氮自由基照射到C_<60>层上而形成的。我们发现所得a-C薄膜的特性取决于氮离子的通量。2.我们观察到a-C阱厚度较薄的C_<60>/a-C超晶格结构中光吸收边的蓝移，并提出有效带隙能量可以通过超晶格结构控制。3.以_C_<60>/a-C超晶格结构作为i层夹在p-a-SiC和n-a-Si 被制造出来。该电池表现出10^<-6>-10^<-5>％的低效率。为了提高电池效率，必须通过杂质掺杂来控制电导率，并降低a-C层的缺陷密度。4.研究了C_<60>薄膜中Mg掺杂对电导率的控制。共蒸发法沉积的Mg掺杂C_<60>薄膜的电阻率降低了6个数量级。5.研究了氢处理a-C薄膜降低缺陷密度的方法。 ESR自旋缺陷密度很大程度上取决于氢处理时间，这对于优化是必要的。6.利用C_<60>基纳米结构研究了有机太阳能电池的C_<60>/有机分子异质界面。证实铜-酞菁以直立的分子平面沉积在C_ 60 (111)表面上。