Investigation of LiF Interlayer on Charge Collection Efficiency and Leakage Current in CsPbBr<sub>3</sub> Radiation Detector

Hao, Yingying; Bai, Ruichen; Zhang, Xin; Sun, Qihao; Wang, Jie; Ye, Xu

doi:10.1109/ted.2022.3215098

Cited by 8 publications

(5 citation statements)

References 45 publications

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“…The high-quality grown single crystal is used to fabricate a -ray detector (He et al, 2021;Feng et al, 2020;Hao et al, 2022). The detection performance of the Ti/Ni/CsPbBr 3 /Ni/Ti detector fabricated from the crystal is measured using a 137 Cs source (662 keV, -ray, 8370 Bq), which is shown in Fig.…”

Section: Detection Characterizationmentioning

confidence: 99%

Study on the vertical Bridgman method of melt-grown CsPbBr₃ single crystals for nuclear radiation detection

Zhang,

Huang,

Xia

et al. 2024

Acta Crystallogr Sect B

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As an excellent representative of all-inorganic perovskite materials, CsPbBr3 has been widely used in high-energy rays or high-energy particles detection for its outstanding high carrier mobility and long diffusion length. The great challenges and opportunities in these fields are crystal growth technology, especially the high-quality and large-sized CsPbBr3 single crystals. In this work, the influences of growth parameters (temperature gradient, growth rate, cooling rate) and thermal stress by the vertical Bridgman method on the quality and performance of CsPbBr3 crystals are systematically studied. The final results show that 10°C cm−1 is the optimized temperature gradient and 0.5 mm h−1 is the suitable growth rate for CsPbBr3 crystal growth. The study also shows that a cooling rate of 10°C h−1 for the general temperature interval and 1°C h−1 for the phase transition temperature interval is helpful to balance crystal growth efficiency as well as crystal quality. Crystal cracks caused by thermal stress as well as crystal adhesion on the ampoule can be effectively solved by depositing a uniform carbon film on the ampoule in advance. The optical, electrical and detection performance are also investigated. The optical characterization in the wavelength region ranging from ultraviolet to infrared indicates the crystal has a low density of deep-level defects and good crystal quality. The resistivity over 109 Ω cm and μτ of electrons over 10−2 cm−2 V−1 proves that the electrical performance of the crystal has met the basic requirement for nuclear radiation detection. The metal–semiconductor–metal structure Ti/Ni/CsPbBr3/Ni/Ti detector fabricated from the optimized CsPbBr3 single crystal has an energy resolution of 12.85% (137Cs, 662 keV). The purpose of this work is to provide a useful guide and reference for the future exploration of repeatable and improvable CsPbBr3 crystal growth technology.

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Section: Detection Characterizationmentioning

confidence: 99%

Study on the vertical Bridgman method of melt-grown CsPbBr₃ single crystals for nuclear radiation detection

Zhang,

Huang,

Xia

et al. 2024

Acta Crystallogr Sect B

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“…The use of cesium lead halides and composites in radiation/photo detection was proposed by numerous researchers [ 168 , 169 , 170 , 171 , 172 , 173 , 174 , 175 , 176 , 177 , 178 , 179 , 180 ]. Ti/Ni/CsPbBr 3 /Ni/Ti (with ER of 5.70% at 8250 V·cm −1 ; ER = energy resolution) [ 153 ], single crystals of CsPbBr 3 (with diverse hole mobilities) [ 169 , 170 , 171 , 172 , 175 ], In/LiF/CPB/Au detectors [ 173 ], CsPbBr 3 QDs embedded in P 3 HT:PC 61 BM (P 3 HT:PC 61 BM:QD; a bulk heterojunction photodiode) [ 174 ], CsPbBr 3 microcrystals on ITO functional substrate [ 176 ], a single-crystalline thin film of CsPbBr 3 (CsPbBr 3 SCF; switching ratio = 3.2 × 10 3 , and response time = 200/300 ns) [ 177 ], CsPbBr 3 /RGO nanocomposites (RGO = reduced graphene oxide) [ 178 ], CsPbBr 3 QD/ZnO NWs nanocomposites [ 179 ], and ZnONW/CsPbBr 3 QD/graphene heterojunction were demonstrated for X-ray, radiation, and photodetection. Ion migration, photon–exciton coupling, electron–hole diffusion, and strain-based mechanisms were proposed as the underlying mechanisms for the radiation/photodetection.…”

Section: Humidity Temperature and Radiation/photodetection By Cspbx ...mentioning

confidence: 99%

“…When detecting photon/radiation, lattice defects could be generated in CsPbX 3 (X = Cl, Br, and I). This problem can be alleviated by using composites with diverse materials [ 168 , 169 , 170 , 171 , 172 , 173 , 174 , 175 , 176 , 177 , 178 , 179 , 180 ]. However, the compositing ratios must be critically evaluated to achieve better sensing results.…”

Section: Humidity Temperature and Radiation/photodetection By Cspbx ...mentioning

confidence: 99%

“…The use of cesium lead halides and composites in radiation/photo detection was proposed by numerous researchers [168][169][170][171][172][173][174][175][176][177][178][179][180]. Ti/Ni/CsPbBr3/Ni/Ti (with ER of 5.70% at 8250 V•cm −1 ; ER = energy resolution) [153], single crystals of CsPbBr3 (with diverse hole mobilities) [169][170][171][172]175], In/LiF/CPB/Au detectors [173], CsPbBr3 QDs embedded in P3HT:PC61BM (P3HT:PC61BM:QD; a bulk heterojunction photodiode) [174], CsPbBr3 microcrystals on ITO functional substrate [176], a single-crystalline thin film of CsPbBr3 (CsPbBr3 SCF; switching ratio = 3.2 × 10 3 , and response time = 200/300 ns) [177], The use of cesium lead halides and composites in radiation/photo detection was proposed by numerous researchers [168][169][170][171][172][173][174][175][176][177][178][179][180]. Ti/Ni/CsPbBr 3 /Ni/Ti (with ER of 5.70% at 8250 V•cm −1 ; ER = energy resolution) [153], single crystals of CsPbBr 3 (with diverse hole mobilities) [169][170][171][172]…”

Section: Humidity Temperature and Radiation/photodetection By Cspbx 3...mentioning

confidence: 99%

“…Ti/Ni/CsPbBr3/Ni/Ti (with ER of 5.70% at 8250 V•cm −1 ; ER = energy resolution) [153], single crystals of CsPbBr3 (with diverse hole mobilities) [169][170][171][172]175], In/LiF/CPB/Au detectors [173], CsPbBr3 QDs embedded in P3HT:PC61BM (P3HT:PC61BM:QD; a bulk heterojunction photodiode) [174], CsPbBr3 microcrystals on ITO functional substrate [176], a single-crystalline thin film of CsPbBr3 (CsPbBr3 SCF; switching ratio = 3.2 × 10 3 , and response time = 200/300 ns) [177], The use of cesium lead halides and composites in radiation/photo detection was proposed by numerous researchers [168][169][170][171][172][173][174][175][176][177][178][179][180]. Ti/Ni/CsPbBr 3 /Ni/Ti (with ER of 5.70% at 8250 V•cm −1 ; ER = energy resolution) [153], single crystals of CsPbBr 3 (with diverse hole mobilities) [169][170][171][172]175], In/LiF/CPB/Au detectors [173], CsPbBr 3 QDs embedded in P 3 HT:PC 61 BM (P 3 HT:PC 61 BM:QD; a bulk heterojunction photodiode) [174], CsPbBr 3 microcrystals on ITO functional substrate [176], a single-crystalline thin film of CsPbBr 3 (CsPbBr 3 SCF; switching ratio = 3.2 × 10 3 , and response time = 200/300 ns) [177], CsPbBr 3 /RGO nanocomposites (RGO = reduced graphene oxide) [178], CsPbBr 3 QD/ZnO NWs nanocomposites [179], and ZnONW/CsPbBr 3 QD/graphene heterojunction were demonstrated for X-ray, radiation, and photodetection. Ion migration, photon-exciton coupling, electron-hole diffusion, and strain-based mechanisms were propose...…”

Section: Humidity Temperature and Radiation/photodetection By Cspbx 3...mentioning

confidence: 99%

See 2 more Smart Citations

Sensing Utilities of Cesium Lead Halide Perovskites and Composites: A Comprehensive Review

Shellaiah,

Sun,

Thirumalaivasan

et al. 2024

Sensors

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Recently, the utilization of metal halide perovskites in sensing and their application in environmental studies have reached a new height. Among the different metal halide perovskites, cesium lead halide perovskites (CsPbX3; X = Cl, Br, and I) and composites have attracted great interest in sensing applications owing to their exceptional optoelectronic properties. Most CsPbX3 nanostructures and composites possess great structural stability, luminescence, and electrical properties for developing distinct optical and photonic devices. When exposed to light, heat, and water, CsPbX3 and composites can display stable sensing utilities. Many CsPbX3 and composites have been reported as probes in the detection of diverse analytes, such as metal ions, anions, important chemical species, humidity, temperature, radiation photodetection, and so forth. So far, the sensing studies of metal halide perovskites covering all metallic and organic–inorganic perovskites have already been reviewed in many studies. Nevertheless, a detailed review of the sensing utilities of CsPbX3 and composites could be helpful for researchers who are looking for innovative designs using these nanomaterials. Herein, we deliver a thorough review of the sensing utilities of CsPbX3 and composites, in the quantitation of metal ions, anions, chemicals, explosives, bioanalytes, pesticides, fungicides, cellular imaging, volatile organic compounds (VOCs), toxic gases, humidity, temperature, radiation, and photodetection. Furthermore, this review also covers the synthetic pathways, design requirements, advantages, limitations, and future directions for this material.

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Interface Energy‐Level Reorganization for Efficient Perovskite γ‐Ray Detectors

Feng,

Chen,

Yan

et al. 2024

Angewandte Chemie

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Metal halide perovskites are promising candidates for γ‐ray spectrum detectors. However, achieving high‐resolution energy spectra in single‐photon pulse‐height analysis mode remains challenging, due to the inevitable leakage currents degrade the recognizable fingerprint energies which is critical for resolving γ‐ray spectroscopy. We demonstrate under high bias voltage, a deficient contact barrier can lead to excessive surface charge injection, thereby increasing leakage current from electrodes to perovskites. Hence, we conceive to employ surface ligand engineering on perovskite single crystals to manipulate energy levels to suppress leakage current. In particular, anchoring a strong dipole ligand onto the perovskite induced surface charge‐density displacement, leading to a downward band bending and heightened the corresponding contact barrier. Consequently, the strategy minimized the detectors’leakage current by an order of magnitude, to as low as 44 nA cm‐2. The resulting detectors show a significant improvement in energy resolution, 3.9% for 22Na 511 keV γ‐rays has been achieved at room temperature. The resulting detector further resolves each fingerprint energy for 152Eu γ‐spectrum, representing one of the best γ‐rays perovskite detectors reported to date. Moreover, the detectors exhibited stabilized energy resolution without any degradation under a continuous electric field for over 300 minutes, representing the longest longevity reported to date.

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Investigation of LiF Interlayer on Charge Collection Efficiency and Leakage Current in CsPbBr₃ Radiation Detector

Cited by 8 publications

References 45 publications

Study on the vertical Bridgman method of melt-grown CsPbBr₃ single crystals for nuclear radiation detection

Study on the vertical Bridgman method of melt-grown CsPbBr₃ single crystals for nuclear radiation detection

Sensing Utilities of Cesium Lead Halide Perovskites and Composites: A Comprehensive Review

Interface Energy‐Level Reorganization for Efficient Perovskite γ‐Ray Detectors

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Investigation of LiF Interlayer on Charge Collection Efficiency and Leakage Current in CsPbBr3 Radiation Detector

Cited by 8 publications

References 45 publications

Study on the vertical Bridgman method of melt-grown CsPbBr3 single crystals for nuclear radiation detection

Study on the vertical Bridgman method of melt-grown CsPbBr3 single crystals for nuclear radiation detection

Sensing Utilities of Cesium Lead Halide Perovskites and Composites: A Comprehensive Review

Interface Energy‐Level Reorganization for Efficient Perovskite γ‐Ray Detectors

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Product

Resources

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Investigation of LiF Interlayer on Charge Collection Efficiency and Leakage Current in CsPbBr₃ Radiation Detector

Study on the vertical Bridgman method of melt-grown CsPbBr₃ single crystals for nuclear radiation detection

Study on the vertical Bridgman method of melt-grown CsPbBr₃ single crystals for nuclear radiation detection