Facile synthesis of large-Stokes-shift giant CdHgSe/CdHgSeS near-infrared quantum dots via chlorine-mediated Ostwald ripening.
14 affiliations
- 1Division of Nanotechnology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, 42988, Republic of Korea.
- 2DGIST-ETH Microrobotics Research Center, DGIST, Daegu, 42988, Republic of Korea.
- 3Institute for Molecular Metabolism Innovation, Soonchunhyang University, Asan, Chungcheongnam-do, 31538, Republic of Korea.
- 4Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongsangbuk-Do, 37673, Republic of Korea.
- 5Division of Interdisciplinary Bioscience and Bioengineering, POSTECH, Pohang, Gyeongsangbuk-Do, 37673, Republic of Korea.
- 6Department of Bioengineering, University of Illinois Urbana-Champaign (UIUC), Urbana, IL, 61801, USA.
- 7Holonyak Micro and Nanotechnology Laboratory, UIUC, Urbana, IL, 61801, USA.
- 8Cancer Center at Illinois, UIUC, Urbana, IL, 61801, USA.
- 9Carl R. Woese Institute for Genomic Biology, UIUC, Urbana, IL, 61801, USA.
- 10Department of Materials Science and Engineering, UIUC, Urbana, IL, 61801, USA.
- 11Carle Illinois College of Medicine, Urbana, IL, 61801, USA.
- 12Department of Energy Science and Engineering, DGIST, Daegu, 42988, Republic of Korea.
- 13Department of Robotics and Mechatronics Engineering, DGIST, Daegu, 42988, Republic of Korea.
- 14Department of Biomedical Engineering, Institute for Applied Life Sciences, University of Massachusetts, Amherst, MA, 01003, USA.
Abstract
Giant core/shell quantum dots (GQDs) offer advantages for optoelectronics, including suppressed blinking and reduced Auger recombination, yet thick-shell growth often requires laborious successive ion layer adsorption and reaction (SILAR) cycles. Here we demonstrate a chlorine-mediated controlled Ostwald ripening strategy that transforms NIR-emitting CdHgSe/CdS core/shell seed QDs into giant CdHgSe/CdHgSeS core/gradient-shell QDs in a single post-synthetic step. Seed QDs are prepared by growing a thin (~1.6-monolayer) CdS shell on CdHgSe alloy cores. Injection of CHCl₃ at 240 °C triggers rapid ripening, in which most seeds dissolve while a minor population grows into GQDs. During ripening, the band-edge absorption feature is strongly attenuated and absorption below ~610 nm increases markedly, whereas NIR emission remains centered near ~900 nm, yielding a large effective Stokes shift that can mitigate reabsorption in luminescent solar concentrators. HAADF-STEM/EDS and XRD support a compositionally graded shell, while mass spectrometry and numerical simulations are consistent with chlorine-modified surface chemistry and altered monomer solubility/surface tension that accelerate ripening. As a proof of concept, embedding the GQDs in PMMA affords a transparent luminescent solar concentrator prototype with retained NIR emission and favorable spectral overlap with silicon photovoltaics.
Related
- Lewis Acid-Activated Bathophenanthroline Photoredox System for Chlorine Radical-Mediated C(sp³)–H Alkylation
- A Novel Integrated Microwave/UV/In Situ Fourier Transform Infrared Platform: Application to 1,5-Benzodiazepines Synthesis
- A convergent total synthesis of the ivermectin aglycon through transition metal-mediated and anionic transformations
- Near-infrared fluorescent probe-mediated high-throughput discovery of a natural β-galactosidase inhibitor for senescence-associated atherosclerosis therapy.
- Enantio-Complementary Synthesis of Atropisomeric C–N Biaryl Amines via Imine Reductase-Mediated Dynamic Kinetic Resolution
BibTeX
@article{lee2026facile,
title = {{Facile synthesis of large-Stokes-shift giant CdHgSe/CdHgSeS near-infrared quantum dots via chlorine-mediated Ostwald ripening.}},
author = {Gyudong Lee and Sanghwang Park and Jongcheol Seo and Wonseok Lee and Opeyemi H Arogundade and Andrew M Smith and Jongmin Choi and Hongsoo Choi and Sung Jun Lim},
journal = {Materials today. Advances},
year = {2026},
month = aug,
doi = {10.1016/j.mtadv.2026.100968},
url = {https://europepmc.org/article/MED/42968830},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - Facile synthesis of large-Stokes-shift giant CdHgSe/CdHgSeS near-infrared quantum dots via chlorine-mediated Ostwald ripening.
AU - Gyudong Lee
AU - Sanghwang Park
AU - Jongcheol Seo
AU - Wonseok Lee
AU - Opeyemi H Arogundade
AU - Andrew M Smith
AU - Jongmin Choi
AU - Hongsoo Choi
AU - Sung Jun Lim
PY - 2026
DA - 2026/08/01
JO - Materials today. Advances
DO - 10.1016/j.mtadv.2026.100968
UR - https://europepmc.org/article/MED/42968830
AB - Giant core/shell quantum dots (GQDs) offer advantages for optoelectronics, including suppressed blinking and reduced Auger recombination, yet thick-shell growth often requires laborious successive ion layer adsorption and reaction (SILAR) cycles. Here we demonstrate a chlorine-mediated controlled Ostwald ripening strategy that transforms NIR-emitting CdHgSe/CdS core/shell seed QDs into giant CdHgSe/CdHgSeS core/gradient-shell QDs in a single post-synthetic step. Seed QDs are prepared by growing a thin (~1.6-monolayer) CdS shell on CdHgSe alloy cores. Injection of CHCl₃ at 240 °C triggers rapid ripening, in which most seeds dissolve while a minor population grows into GQDs. During ripening, the band-edge absorption feature is strongly attenuated and absorption below ~610 nm increases markedly, whereas NIR emission remains centered near ~900 nm, yielding a large effective Stokes shift that can mitigate reabsorption in luminescent solar concentrators. HAADF-STEM/EDS and XRD support a compositionally graded shell, while mass spectrometry and numerical simulations are consistent with chlorine-modified surface chemistry and altered monomer solubility/surface tension that accelerate ripening. As a proof of concept, embedding the GQDs in PMMA affords a transparent luminescent solar concentrator prototype with retained NIR emission and favorable spectral overlap with silicon photovoltaics.
SN - 2590-0498
ER -