TY - GEN
T1 - High photo-current generation in a three-dimensional silicon quantum dot superlattice fabricated by combination of bio-template and neutral beam etching for quantum dot solar cell
AU - Rahman, Mohammad Maksudur
AU - Igarashi, Makoto
AU - Hu, Weiguo
AU - Syazwan, Mohd Erman
AU - Hoshi, Yusuke
AU - Usami, Noritaka
AU - Samukawa, Seiji
PY - 2013
Y1 - 2013
N2 - 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%).
AB - 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%).
KW - Mini band
KW - Quantum dot
KW - Silicon
KW - Super lattice
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U2 - 10.1109/PVSC.2013.6744972
DO - 10.1109/PVSC.2013.6744972
M3 - Conference contribution
AN - SCOPUS:84896444690
SN - 9781479932993
T3 - Conference Record of the IEEE Photovoltaic Specialists Conference
SP - 2456
EP - 2458
BT - 39th IEEE Photovoltaic Specialists Conference, PVSC 2013
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 39th IEEE Photovoltaic Specialists Conference, PVSC 2013
Y2 - 16 June 2013 through 21 June 2013
ER -