TY - JOUR
T1 - Perovskite CsPbBr 3 single crystal detector for alpha-particle spectroscopy
AU - He, Yihui
AU - Liu, Zhifu
AU - McCall, Kyle M.
AU - Lin, Wenwen
AU - Chung, Duck Young
AU - Wessels, Bruce W.
AU - Kanatzidis, Mercouri G.
N1 - Funding Information:
This work was partially supported by the Department of Energy, National Nuclear Security Administration, Office of Defense Nuclear Nonproliferation Research and Development, United States under contract No. DE-AC02-06CH11357 (Argonne National Laboratory). Work by Y.H., Z.L., K.M.M. and B.W.W. was supported by the Department of Homeland Security ARI program, United States with grant 2014-DN-077-ARI086-01 . We are also very grateful for the help from Prof. Arnold Burger at Fisk University in the electrode preparation process.
PY - 2019/4/1
Y1 - 2019/4/1
N2 - Here we report the first spectroscopic alpha particle detection based on CsPbBr 3 detectors with asymmetric contacts. The CsPbBr 3 single crystal was grown from the melt using Bridgman method and then fabricated into detectors with different contacts. The In/CsPbBr 3 /Au detector presented a low dark current density (∼100 nA/cm 2 ) and temporal stable performance under high electric field (1000 V/cm). Such detector demonstrated excellent gamma ray resolving capability with a full-width at half maximum (FWHM) of ∼5.9 keV for the 57 Co 122 keV γ ray. The CsPbBr 3 detector was capable of simultaneously resolving both the alpha particle (5.5 MeV) and γ ray (59.5 keV) peaks from 241 Am radioactive isotope. The transport properties of CsPbBr 3 were then determined based on the alpha particle spectra and corresponding rise time distributions. The equivalent values of electron and hole mobilities were indicated as 63 and 49 cm 2 /(V ⋅ s) respectively. The calculated electron and hole mobility-lifetime products were 4.5 × 10 −4 and 9.5 × 10 −4 cm 2 /V, respectively, demonstrating superior transport properties of holes over electrons in CsPbBr 3 . This work widens the scope of perovskite detectors to encompass charged radiation as well as high energy X/γ rays, and will significantly promote and guide further studies on perovskite materials for radiation detection applications.
AB - Here we report the first spectroscopic alpha particle detection based on CsPbBr 3 detectors with asymmetric contacts. The CsPbBr 3 single crystal was grown from the melt using Bridgman method and then fabricated into detectors with different contacts. The In/CsPbBr 3 /Au detector presented a low dark current density (∼100 nA/cm 2 ) and temporal stable performance under high electric field (1000 V/cm). Such detector demonstrated excellent gamma ray resolving capability with a full-width at half maximum (FWHM) of ∼5.9 keV for the 57 Co 122 keV γ ray. The CsPbBr 3 detector was capable of simultaneously resolving both the alpha particle (5.5 MeV) and γ ray (59.5 keV) peaks from 241 Am radioactive isotope. The transport properties of CsPbBr 3 were then determined based on the alpha particle spectra and corresponding rise time distributions. The equivalent values of electron and hole mobilities were indicated as 63 and 49 cm 2 /(V ⋅ s) respectively. The calculated electron and hole mobility-lifetime products were 4.5 × 10 −4 and 9.5 × 10 −4 cm 2 /V, respectively, demonstrating superior transport properties of holes over electrons in CsPbBr 3 . This work widens the scope of perovskite detectors to encompass charged radiation as well as high energy X/γ rays, and will significantly promote and guide further studies on perovskite materials for radiation detection applications.
KW - Alpha particle detection
KW - Crystal growth
KW - CsPbBr
KW - Perovskite single crystal
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U2 - 10.1016/j.nima.2019.01.008
DO - 10.1016/j.nima.2019.01.008
M3 - Article
AN - SCOPUS:85059944365
VL - 922
SP - 217
EP - 221
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
SN - 0168-9002
ER -