Lead-free zero-dimensional organic-copper(I) halides as stable and sensitive X-ray scintillators

0557241 - FZÚ 2023 RIV US eng J - Journal Article
Xu, T.T. - Li, Y.Y. - Nikl, Martin - Kučerková, Romana - Zhou, Z.Y. - Chen, J. - Sun, Y.Y. - Niu, G. - Tang, J. - Wang, Q. - Ren, G.H. - Wu, Y.T.
Lead-free zero-dimensional organic-copper(I) halides as stable and sensitive X-ray scintillators.
ACS Applied Materials and Interfaces. Roč. 14, č. 12 (2022), s. 14157-14164. ISSN 1944-8244. E-ISSN 1944-8252
R&D Projects: GA MŠMT(CZ) EF16_019/0000760
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : X-ray scintillators * single crystals * organic-inorganic hybrid metal halides * copper(I)halide hybrids * zero-dimensional structure
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 9.5, year: 2022
Method of publishing: Limited access
https://doi.org/10.1021/acsami.1c23839

Low-dimensional organic−metal halides are regarded as an emerging class of X-ray scintillation materials, but most of the discovered compounds are confronted with challenges of toxicity and instability. To address these challenges, we herein report two lead-free zero-dimensional (0D) hybrid halides, (Bmpip)2Cu2Br4 and PPh4CuBr2 single crystals, grown by the low-cost solution-processing method. By single-crystal X-ray diffraction refinement, the crystal structures of (Bmpip)2Cu2Br4 and PPh4CuBr2 were determined to be orthorhombic and monoclinic crystal systems, respectively. (Bmpip)2Cu2Br4 and PPh4CuBr2 show broadband orange and yellow emissions peaking at 620 and 538nm, respectively. Different from the emission nature of the recent reported Cu-based halide hybrids, both (Bmpip)2Cu2Br4 and PPh4CuBr2 emit from excitons bound to defects featuring spin-allowed transition, enabling them to possess fast scintillation decay time of tens of nanoseconds, respectively.
Permanent Link: http://hdl.handle.net/11104/0331549