Fast-Neutron Scintillation with Multi-Quantum-Well 2D Perovskites
Abstract
Fast-neutron scintillators must efficiently convert neutron energy into detectable light while enabling selectivity between neutrons and the γ-ray background. Here, we report a synthesis strategy for layered two-dimensional (2D) lead halide perovskite scintillators with independent control of the macroscopic detector geometry and microscopic phase composition. Our synthesis approach produces mm-thick, large-area scintillators with a deliberately engineered multi-quantum-well energy landscape, creating an effective spectral separation while retaining nanosecond emission dynamics. Our scintillators exhibit an energy resolution of 5.4% at 662 keV under 137Cs irradiation. Under deuterium-deuterium fusion neutron irradiation, we directly demonstrate neutron and γ-ray event separation by pulse shape discrimination, with a figure of merit of 3.51. Taken together, these results establish multi-quantum-well 2D perovskites as a scalable materials platform that combines fast-neutron sensitivity and selectivity within a controllable detector form factor.
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BibTeX
@misc{tan2026fastneutron,
title = {{Fast-Neutron Scintillation with Multi-Quantum-Well 2D Perovskites}},
author = {Shaun Tan and Zachary Benesh and Seong Eui Chang and Shelby Elder and Haidi Jakovic and Tae-Woo Lee and Moungi G. Bawendi},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.28468},
eprint = {2609.28468},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.28468},
}
RIS
TY - UNPB
TI - Fast-Neutron Scintillation with Multi-Quantum-Well 2D Perovskites
AU - Shaun Tan
AU - Zachary Benesh
AU - Seong Eui Chang
AU - Shelby Elder
AU - Haidi Jakovic
AU - Tae-Woo Lee
AU - Moungi G. Bawendi
PY - 2026
DA - 2026/09/23
PB - arXiv
DO - 10.48550/arxiv.2609.28468
UR - https://arxiv.org/abs/2609.28468
AB - Fast-neutron scintillators must efficiently convert neutron energy into detectable light while enabling selectivity between neutrons and the γ-ray background. Here, we report a synthesis strategy for layered two-dimensional (2D) lead halide perovskite scintillators with independent control of the macroscopic detector geometry and microscopic phase composition. Our synthesis approach produces mm-thick, large-area scintillators with a deliberately engineered multi-quantum-well energy landscape, creating an effective spectral separation while retaining nanosecond emission dynamics. Our scintillators exhibit an energy resolution of 5.4% at 662 keV under 137Cs irradiation. Under deuterium-deuterium fusion neutron irradiation, we directly demonstrate neutron and γ-ray event separation by pulse shape discrimination, with a figure of merit of 3.51. Taken together, these results establish multi-quantum-well 2D perovskites as a scalable materials platform that combines fast-neutron sensitivity and selectivity within a controllable detector form factor.
ER -