Journal Article

FZJ-2016-07930

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Broadband infrared absorption enhancement by electroless-deposited silver nanoparticles

Gritti, C. ; Raza, S. ; Kadkhodazadeh, S. ; Kardynal, B.FZJ* ; Malureanu, R. ; Mortensen, N. A. ; Lavrinenko, A. V.

2017
de Gruyter Berlin

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Please use a persistent id in citations: http://hdl.handle.net/2128/13404  doi:10.1515/nanoph-2016-0114

Abstract: Decorating semiconductor surfaces with plasmonic nanoparticles (NPs) is considered a viable solution for enhancing the absorptive properties of photovoltaic and photodetecting devices. We propose to deposit silver NPs on top of a semiconductor wafer by a cheap and fast electroless plating technique. Optical characterization confirms that the random array of electroless-deposited NPs improves absorption by up to 20% in a broadband of near-infrared frequencies from the bandgap edge to 2000 nm. Due to the small filling fraction of particles, the reflection in the visible range is practically unchanged, which points to the possible applications of such deposition method for harvesting photons in nanophotonics and photovoltaics. The broadband absorption is a consequence of the resonant behavior of particles with different shapes and sizes, which strongly localize the incident light at the interface of a high-index semiconductor substrate. Our hypothesis is substantiated by examining the plasmonic response of the electroless-deposited NPs using both electron energy loss spectroscopy and numerical calculations.

Keyword(s): Energy (1st)

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Contributing Institute(s):

1. Halbleiter-Nanoelektronik (PGI-9)
2. JARA-FIT (JARA-FIT)

Research Program(s):

1. 524 - Controlling Collective States (POF3-524) (POF3-524)

Appears in the scientific report 2017

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Database coverage:
; ; ; ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; IF < 5 ; JCR ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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