Near-unity emitting copper-doped colloidal semiconductor quantum wells for luminescent solar concentrators
Author(s)
Date
2017Source Title
Advanced Materials
Print ISSN
0935-9648
Publisher
Wiley-VCH Verlag
Volume
29
Issue
30
Pages
1 - 10
Language
English
Type
ArticleItem Usage Stats
189
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262
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Abstract
Doping of bulk semiconductors has revealed widespread success in optoelectronic applications. In the past few decades, substantial effort has been engaged for doping at the nanoscale. Recently, doped colloidal quantum dots (CQDs) have been demonstrated to be promising materials for luminescent solar concentrators (LSCs) as they can be engineered for providing highly tunable and Stokes-shifted emission in the solar spectrum. However, existing doped CQDs that are aimed for full solar spectrum LSCs suffer from moderately low quantum efficiency, intrinsically small absorption cross-section, and gradually increasing absorption profiles coinciding with the emission spectrum, which together fundamentally limit their effective usage. Here, the authors show the first account of copper doping into atomically flat colloidal quantum wells (CQWs). In addition to Stokes-shifted and tunable dopant-induced photoluminescence emission, the copper doping into CQWs enables near-unity quantum efficiencies (up to ≈97%), accompanied by substantially high absorption cross-section and inherently step-like absorption profile, compared to those of the doped CQDs. Based on these exceptional properties, the authors have demonstrated by both experimental analysis and numerical modeling that these newly synthesized doped CQWs are excellent candidates for LSCs. These findings may open new directions for deployment of doped CQWs in LSCs for advanced solar light harvesting technologies.
Keywords
2D semiconductor nanoplateletsCopper doping
Luminescent solar concentrators
Nucleation doping
Quantum efficiency
Absorption spectroscopy
Copper
Doping (additives)
Efficiency
Emission spectroscopy
Flowcharting
Luminescence
Semiconductor doping
Semiconductor quantum dots
Semiconductor quantum wells
Solar concentrators
Solar radiation
Absorption cross sections
Colloidal quantum wells
Permalink
http://hdl.handle.net/11693/36424Published Version (Please cite this version)
http://dx.doi.org/10.1002/adma.201700821Collections
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