Amorphous Si/SiC three‐color detector with adjustable threshold
作者:
G. de Cesare,
F. Irrera,
F. Lemmi,
F. Palma,
期刊:
Applied Physics Letters
(AIP Available online 1995)
卷期:
Volume 66,
issue 10
页码: 1178-1180
ISSN:0003-6951
年代: 1995
DOI:10.1063/1.113849
出版商: AIP
数据来源: AIP
摘要:
An adjustable threshold color detector (ATCD) is demonstrated, based on a hydrogenated amorphous silicon (a‐Si:H) and silicon–carbide (a‐SiC:H)p+‐i‐n+‐i‐n+‐i‐p+multilayer. The ATCD is able to discriminate between blue (&lgr;=450 nm), green (550 nm), and red (≳650 nm) illumination by varying the externally applied voltage within a few volts. The operation of the detector can be explained regarding the ATCD as three independent devices connected in series: ap+‐i‐n+, an+‐i‐n+, and an+‐i‐p+. The novel feature is then+‐i‐n+cell. It acts as a short circuit under strong illumination, whereas in dark it is equivalent to two low quality back‐to‐back diodes which introduce a shift in the threshold in the photocurrent detection. Thanks to the large number of physical parameters such as layer thickness and band gap the ATCD appears extremely versatile. ©1995 American Institute of Physics.
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