Lao, Y-F, Pitigala, PKDDP, Unil Perera, AG et al. (3 more authors)
(2014)
Wavelength-extended photovoltaic infrared photodetectors.
Applied Physics Letters, 104 (13).
131101.
ISSN 0003-6951
Abstract
We report the incorporation of a long-wavelength photovoltaic response (up to 8μm) in a short-wavelength p-type GaAs heterojunction detector (with the activation energy of EA∼0.40 eV), operating at 80K. This wavelength-extended photovoltaic response is enabled by employing a non-symmetrical band alignment. The specific detectivity at 5μm is obtained to be 3.5×10 cm Hz/W, an improvement by a factor of 10 over the detector without the wavelength extension.
Metadata
Item Type:
Article
Authors/Creators:
Lao, Y-F
Pitigala, PKDDP
Unil Perera, AG
Li, LH
Khanna, SP
Linfield, EH
Copyright, Publisher and Additional Information:
(c) 2014, AIP publishing. Reproduced in accordance with the publisher's self-archiving policy.
Keywords:
Solar energy; Photoexcitations; Activation energies; Photodetectors; Photons
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