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Description:

We offer direct evidence that hBN SPEs generated through annealing are not inside the hBN itself but originate from organic residues that carbonize and form aromatic fluorophores. Nanoscale Fourier transform infrared spectroscopy is used to analyze the emission sites, revealing the presence of carbon bonds in aromatic rings with a characteristic C═C absorption peak at 1650 cm–1. These emitters are primarily located in encapsulated areas of the hBN flake rather than uniformly distributed within the lattice. This finding opens the door to designing stable and reliable SPEs, enabling their integration into the rapidly growing quantum photonics applications.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: Hexagonal boron nitride, Single photon emitter, Nano-FTIR

Date published: 2026-02-26

Publisher: American Chemical Society (ACS)

Journal:

• The Journal of Physical Chemistry Letters (ISSN: 19487185) vol. 17 issue. 8 p. 2197-2204

Funding:

• Hsinchu Science Park Bureau, Ministry of Science and Technology, Taiwan 107-2221-E-009-046-MY3
• Hsinchu Science Park Bureau, Ministry of Science and Technology, Taiwan 108-2218-E-009-031
• Hsinchu Science Park Bureau, Ministry of Science and Technology, Taiwan 108-2923-E-009-003-MY3
• Fusion Oriented REsearch for disruptive Science and Technology JPMJFR2139
• National Institute for Materials Science

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1021/acs.jpclett.5c03632

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Updated at: 2026-04-16 15:16:08 +0900

Published on MDR: 2026-04-16 16:26:10 +0900