Authors
Daniel C Hayes, Patrick Y Yee, Madeleine J Fort, Adam E Colbert, Katherine Burgess, Chase T Ellis, Joseph G Tischler, Janice E Boercker
Published in
The journal of physical chemistry letters. Volume 17. Issue 35. Pages 10099-10104. Sep 03, 2026.
Abstract
Despite their ideal exciton energies, implementation of colloidal lead selenide (PbSe) nanocrystals into extended short- to mid-wave infrared (eSWIR to MWIR) optoelectronic devices has been limited due to their chemical instability in air and insufficient colloidal stability at sizes large enough (diameter of >13 nm) to reach this spectral range. To address this, we investigate Pb chalcogenide core/shell/shell nanocrystals with a PbSe core, a first shell of PbS, and a second surface-layer shell of PbClx (PbSe/PbS/PbClx core/shell/shell), to produce nanocrystals tunable within the eSWIR to MWIR (λ = ∼2.2-3.1 μm) region with notable increases in the photoluminescence quantum yield (>4×) and both colloidal and air stability compared to core-only PbSe nanocrystals. The PbS/PbClx shell/shell is ∼1-2 nm thick and results in a red shift of the nanocrystal exciton energies. This work improves the viability of solution processed thin-film eSWIR and MWIR PbSe colloidal nanocrystal photodetectors, sensors, and light sources.
PMID:
42691369
Bibliographic data and abstract were imported from PubMed on 04 Sep 2026.
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