In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 49, No. 4S ( 2010-04-01), p. 04DL16-
Abstract:
We have already developed a uniform silicon-based two-dimensional quantum dot superlattice (2D QDSL) (i.e., 2D array of Si nanodisks) on the x – y plane with high-density nanodisks (NDs) and controllable size and spacing between NDs. To integrate more nanodisks in the third dimension ( z -axis), a new stacked nanodisk (S-ND) has been developed by using thin film deposition, bio-template and advanced alternate etching. The S-ND structure comprises of two NDs connected vertically by coupling a tunnel junction (TJ). The scanning transmission electron microscopy image clearly revealed the stacked structure. The quantum confinement of S-ND was confirmed by observing the Coulomb staircase at room temperature. Tunneling current could be controlled by changing TJ thickness. By simply changing the ND thickness, band gap energy ( E g ) could be controlled. These characteristics of the quantum effect and E g play important roles in QDSL solar cells.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.49.04DL16
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2010
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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