A new structural phase transition in CsPbCl3

Sakudo, Tunetaro; Unoki, Hiromi; Fujii, Yasuhiko; Kobayashi, Junya; Yamada, Masaki

doi:10.1016/0375-9601(69)90094-2

Cited by 32 publications

(4 citation statements)

References 3 publications

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“…CsPbBr 3 detectors with asymmetric contacts have substantially achieved high resistivity (over 10 9 Ω·cm) and high figure-of-merit mobility-lifetime product (over 10 –3 cm 2 /V for hole) and demonstrated remarkable energy resolving performance under hard X-rays and γ-rays, specifically in achieving an energy resolution of 3.9% (4.8 keV, FWHM) under 122 keV 57 Co γ-rays . The chloride perovskite analogue CsPbCl 3 semiconductor, however, has not been investigated as γ-ray detector material. − Such investigations will require the development of very large crystals and a better understanding of the nature of its phase transitions, both of which remain unexplored. In previous reports, CsPbCl 3 nanocrystals have been implemented in light-emitting diodes and photodetectors in thin film form by using solution-based processing. , …”

Section: Introductionmentioning

confidence: 99%

Demonstration of Energy-Resolved γ-Ray Detection at Room Temperature by the CsPbCl₃ Perovskite Semiconductor

He¹,

Stoumpos²,

Hadar³

et al. 2021

J. Am. Chem. Soc.

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The detection of γ-rays at room temperature with highenergy resolution using semiconductors is one of the most challenging applications. The presence of even the smallest amount of defects is sufficient to kill the signal generated from γ-rays which makes the availability of semiconductors detectors a rarity. Lead halide perovskite semiconductors exhibit unusually high defect tolerance leading to outstanding and unique optoelectronic properties and are poised to strongly impact applications in photoelectric conversion/detection. Here we demonstrate for the first time that large size single crystals of the all-inorganic perovskite CsPbCl 3 semiconductor can function as a high-performance detector for γ-ray nuclear radiation at room temperature. CsPbCl 3 is a wide-gap semiconductor with a bandgap of 3.03 eV and possesses a high effective atomic number of 69.8. We identified the two distinct phase transitions in CsPbCl 3 , from cubic (Pm-3m) to tetragonal (P4/mbm) at 325 K and finally to orthorhombic (Pbnm) at 316 K. Despite crystal twinning induced by phase transitions, CsPbCl 3 crystals in detector grade can be obtained with high electrical resistivity of ∼1.7 × 10 9 Ω•cm. The crystals were grown from the melt with volume over several cubic centimeters and have a low thermal conductivity of 0.6 W m −1 K −1 . The mobilities for electron and hole carriers were determined to ∼30 cm 2 /(V s). Using photoemission yield spectroscopy in air (PYSA), we determined the valence band maximum at 5.66 ± 0.05 eV. Under γ-ray exposure, our Schottky-type planar CsPbCl 3 detector achieved an excellent energy resolution (∼16% at 122 keV) accompanied by a high figure-of-merit hole mobility-lifetime product (3.2 × 10 −4 cm 2 /V) and a long hole lifetime (16 μs). The results demonstrate considerable defect tolerance of CsPbCl 3 and suggest its strong potential for γ-radiation and X-ray detection at room temperature and above.

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Section: Introductionmentioning

confidence: 99%

Demonstration of Energy-Resolved γ-Ray Detection at Room Temperature by the CsPbCl₃ Perovskite Semiconductor

He¹,

Stoumpos²,

Hadar³

et al. 2021

J. Am. Chem. Soc.

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“…The synthesis of bulk CsPbX 3 compounds was reported as early as 1893, whereas their perovskite crystal structure and photoconductive, and hence semiconductive, nature was only discerned later, in the 1950s . Since then and until the late 1990s, CsPbX 3 compounds were rather thoroughly characterized as to the details of their crystallography and phase diagrams, including direct structural characterization by X-ray and neutron scattering and by nuclear magnetic resonance. − Also, a number of lead-free halide perovskites were studied at that time; CsSnX 3 phase transitions were characterized, ,− and specific electrical conductivity was observed . CsGeCl 3 was reported to have dielectric constants comparable to BaTiO 3 while exhibiting ferroelectric characteristics as well .…”

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confidence: 99%

Lead Halide Perovskite Nanocrystals in the Research Spotlight: Stability and Defect Tolerance

et al. 2017

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This Perspective outlines basic structural and optical properties of lead halide perovskite colloidal nanocrystals, highlighting differences and similarities between them and conventional II–VI and III–V semiconductor quantum dots. A detailed insight into two important issues inherent to lead halide perovskite nanocrystals then follows, namely, the advantages of defect tolerance and the necessity to improve their stability in environmental conditions. The defect tolerance of lead halide perovskites offers an impetus to search for similar attributes in other related heavy metal-free compounds. We discuss the origins of the significantly blue-shifted emission from CsPbBr3 nanocrystals and the synthetic strategies toward fabrication of stable perovskite nanocrystal materials with emission in the red and infrared parts of the optical spectrum, which are related to fabrication of mixed cation compounds guided by Goldschmidt tolerance factor considerations. We conclude with the view on perspectives of use of the colloidal perovskite nanocrystals for applications in backlighting of liquid-crystal TV displays.

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“…The phase transitions have been investigated by X-ray and neutron diffraction [1][2][3][4][5][6][7], Raman scattering [1,8], ultrasonics [6,9,10], nuclear magnetic resonance, N M R [11], and nuclear quadrupole resonance, N Q R [12][13][14], Measurements of thermal expansion, birefringence, dielectric proper ties, and the specific heat have been reported [7,10,[15][16][17] as well as studies of the influence of hydro static pressure on the phase transitions [18]. Com bin ing EPR on G d 30 doped C sPbC l3 crystals and mea surements of dielectric properties, Cohen et al [19] observed six different phases in the temperature range 170 ^ TIK ^ 320.…”

Section: Introductionmentioning

confidence: 99%

²⁰⁷Pb and ²⁰⁵Tl NMR on Perovskite Type Crystals APbX₃ (A = Cs, Tl, X = Br, I)

Sharma

Weiden

Weiß

1987

Zeitschrift Für Naturforschung A

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A new structural phase transition in CsPbCl3

Cited by 32 publications

References 3 publications

Demonstration of Energy-Resolved γ-Ray Detection at Room Temperature by the CsPbCl₃ Perovskite Semiconductor

Demonstration of Energy-Resolved γ-Ray Detection at Room Temperature by the CsPbCl₃ Perovskite Semiconductor

Lead Halide Perovskite Nanocrystals in the Research Spotlight: Stability and Defect Tolerance

²⁰⁷Pb and ²⁰⁵Tl NMR on Perovskite Type Crystals APbX₃ (A = Cs, Tl, X = Br, I)

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A new structural phase transition in CsPbCl3

Cited by 32 publications

References 3 publications

Demonstration of Energy-Resolved γ-Ray Detection at Room Temperature by the CsPbCl3 Perovskite Semiconductor

Demonstration of Energy-Resolved γ-Ray Detection at Room Temperature by the CsPbCl3 Perovskite Semiconductor

Lead Halide Perovskite Nanocrystals in the Research Spotlight: Stability and Defect Tolerance

207Pb and 205Tl NMR on Perovskite Type Crystals APbX3 (A = Cs, Tl, X = Br, I)

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Demonstration of Energy-Resolved γ-Ray Detection at Room Temperature by the CsPbCl₃ Perovskite Semiconductor

Demonstration of Energy-Resolved γ-Ray Detection at Room Temperature by the CsPbCl₃ Perovskite Semiconductor

²⁰⁷Pb and ²⁰⁵Tl NMR on Perovskite Type Crystals APbX₃ (A = Cs, Tl, X = Br, I)