IEICE Electronics Express
Online ISSN : 1349-2543
LETTER
Improvement of electroluminescence from CdF2/CaF2 intersubband transition light-emitting structure by trench patterning and hydrogen annealing of Si substrate
Keisuke JinenKaoru UchidaShinji KodairaMasahiro WatanabeMasahiro Asada
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2006 Volume 3 Issue 23 Pages 493-498

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Abstract

An improvement of the electroluminescence (EL) intensity of the CdF2/CaF2 intersubband transition (ISBT) light-emitting structure is reported. In the ISBT active region, the precise control of crystal growth is strongly required. In this work, the hydrogen-annealing surface flattening of Si substrates was employed to obtain a high quality active region to suppress non-radiative leakage current. A markedly flat surface was obtained in the 30-µm-wide trench bottom after hydrogen annealing. In the EL measurement of the device fabricated in the trench, the EL intensity was approximately 40 times stronger than that of the device without patterning and hydrogen annealing.

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© 2006 by The Institute of Electronics, Information and Communication Engineers
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