Self-rolling and light-trapping in flexible quantum well-embedded nanomembranes for wide-angle infrared photodetectors.
Sci Adv
; 2(8): e1600027, 2016 08.
Article
em En
| MEDLINE
| ID: mdl-27536723
ABSTRACT
Three-dimensional (3D) design and manufacturing enable flexible nanomembranes to deliver unique properties and applications in flexible electronics, photovoltaics, and photonics. We demonstrate that a quantum well (QW)-embedded nanomembrane in a rolled-up geometry facilitates a 3D QW infrared photodetector (QWIP) device with enhanced responsivity and detectivity. Circular geometry of nanomembrane rolls provides the light coupling route; thus, there are no external light coupling structures, which are normally necessary for QWIPs. This 3D QWIP device under tube-based light-trapping mode presents broadband enhancement of coupling efficiency and omnidirectional detection under a wide incident angle (±70°), offering a unique solution to high-performance focal plane array. The winding number of these rolled-up QWIPs provides well-tunable blackbody photocurrents and responsivity. 3D self-assembly of functional nanomembranes offers a new path for high conversion efficiency between light and electricity in photodetectors, solar cells, and light-emitting diodes.
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MEDLINE
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Técnicas Biossensoriais
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Nanotecnologia
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Pontos Quânticos
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Nanoestruturas
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Raios Infravermelhos
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Membranas Artificiais
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article