Solid-State Thin-Film Broadband Short-Wave Infrared Light Emitters
View/Open
Cita com:
hdl:2117/351945
Document typeArticle
Defense date2020-09-30
Rights accessOpen Access
Except where otherwise noted, content on this work
is licensed under a Creative Commons license
:
Attribution-NonCommercial-NoDerivs 3.0 Spain
ProjectAGR-INSTITUTO DE CIENCIAS FOTONICAS (MINECO-SEV-2015-0522)
HEINSOL - Hierarchically Engineered Inorganic Nanomaterials from the atomic to supra-nanocrystalline level as a novel platform for SOLution Processed SOLar cells (EC-H2020-725165)
HEINSOL - Hierarchically Engineered Inorganic Nanomaterials from the atomic to supra-nanocrystalline level as a novel platform for SOLution Processed SOLar cells (EC-H2020-725165)
Abstract
Solid-state broadband light emitters in the visible have revolutionized today's lighting technology achieving compact footprints, flexible form factors, long lifetimes, and high energy saving, although their counterparts in the infrared are still in the development phase. To date, broadband emitters in the infrared have relied on phosphor-downconverted light emitters based on atomic optical transitions in transition metal or rare earth elements in the phosphor layer resulting in limited spectral bandwidths in the near-infrared and preventing their integration into electrically driven light-emitting diodes (LEDs). Herein, phosphor-converted LEDs based on engineered stacks of multi-bandgap colloidal quantum dots (CQDs) are reported as a novel class of broadband emitters covering a broad short-wave infrared (SWIR) spectrum from 1050–1650 nm with a full-width-half-maximum of 400 nm, delivering 14 mW of optical power with a quantum efficiency of 5.4% and power conversion efficiency of 13%. Leveraging the electrical conductivity of the CQD stacks, further, the first broadband SWIR-active LED is demonstrated, paving the way toward complementary metal–oxide–semiconductor integrated broadband emitters for on-chip spectrometers and low-cost volume manufacturing. SWIR spectroscopy is employed to illustrate the practical relevance of the emitters in food and material identification case studies.
CitationPradhan, S.; Dalmases, M.; Konstantatos, G. Solid-State Thin-Film Broadband Short-Wave Infrared Light Emitters. "Advanced materials", 30 Setembre 2020, vol. 2020, núm. 32, p. 2003830.
Publisher versionhttps://onlinelibrary.wiley.com/doi/full/10.1002/adma.202003830
Collections
Files | Description | Size | Format | View |
---|---|---|---|---|
adma.202003830.pdf | 1,159Mb | View/Open |