High Photo-Current Generation in a Three-Dimensional Silicon Quantum Dot Super lattice Fabricated by Combination of Bio-Template and Neutral Beam Etching for Quantum Dot Solar Cell

被引:0
作者
Rahman, Mohammad Maksudur [1 ,4 ]
Igarashi, Makoto [1 ,4 ]
Hu, Weiguo [1 ,4 ]
Syazwan, Mohd Erman [1 ,4 ]
Hoshi, Yusuke [2 ]
Usami, Noritaka [2 ]
Samukawa, Seiji [1 ,3 ,4 ]
机构
[1] Tohoku Univ, Inst Fluid Sci, Sendai, Miyagi 9808577, Japan
[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
[3] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan
[4] Japan Sci & Technol Agcy, CREST, Tokyo 1020076, Japan
来源
2013 IEEE 39TH PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC) | 2013年
关键词
silicon; quantum dot; super lattice; mini band;
D O I
暂无
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
A Quantum Dot Superlattice (QDSL) offers high prospect for new generation photovoltaics. We fabricated and characterized a 3-dimensional array of Si-NDs as a QDSL with a high-aspect ratio, clear interface, and uniform size by using our advanced top-down technology consisting of bio-template and neutral beam etching processes for high-efficiency solar cells. Conductive atomic force microscopy measurements revealed that the conductivity became higher as the arrangement was changed from single Si-ND to 2D and 3D arrays with the same matrix of SiC, i.e. the coupling of wave functions was changed. Moreover, we measured the contribution of 3D Si-NDs array in producing photocurrent inside a quantum dot solar cell and also observed a higher photo absorption of sunlight by 3D Si-NDs (30%) than by a 2D array of Si-NDs (10%).
引用
收藏
页码:2456 / 2458
页数:3
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