In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 38, No. 6R ( 1999-06-01), p. 3550-
Abstract:
Optical and structural properties of Cd x Zn 1- x Se ternary alloy layers grown by molecular-beam epitaxy (MBE) have been studied as a function of the Se/(Cd, Zn) beam pressure ratio (BPR). With increasing Se/(Cd, Zn) BPR, the inhomogeneous broadening of exciton luminescence and the rms roughness of surfaces decreased drastically. This indicates that Se-excess supply during MBE growth suppresses alloy composition fluctuation and also enhances two-dimensional growth nucleation. Furthermore, Cd x Zn 1- x Se–ZnSe multiple quantum well (MQW) structures have been fabricated under Se-excess supply. Biexciton luminescence from MQW structures was observed, even under a cw weak excitation condition (less than 100 mW/cm 2 ). This observation reflects the finding that exciton lifetime increase as a result of the improvement of crystalline quality, which results in the enhancement of carrier accumulation.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.38.3550
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1999
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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