IEEE Electron Device Letters, Journal Year: 2024, Volume and Issue: 45(8), P. 1441 - 1444
Published: June 21, 2024
Language: Английский
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: April 23, 2025
Abstract Metal‐halide perovskite single crystals (SCs) are promising candidates for next‐generation X‐ray detectors. detectors fabricated using FAPbI 3 SCs exhibit high detection sensitivity. However, two pressing issues still need to be addressed practical applications: the orientation‐controlled growth and environmentally friendly acquisition of high‐quality SCs. In this study, large SC rods (SCRs) with unique orientation grown a biomass‐derived green solvent. Owing carrier mobility bulk resistivity oriented SCRs, realize record sensitivity (2.16 × 10 5 µC Gy −1 cm −2 ) dark current density ratio (1.93 9 s). Furthermore, both ultralow drifts, as well limit 2 nGy s . These characteristics enable achieve high‐resolution imaging, even at dose rates low 12 This study not only contributes new technical solution low‐dose detection, but also establishes approach low‐cost production core materials
Language: Английский
Citations
0
Nano Letters, Journal Year: 2024, Volume and Issue: 24(27), P. 8436 - 8444
Published: June 26, 2024
Two-dimensional (2D) lead halide perovskites are excellent candidates for X-ray detection due to their high resistivity, ion migration barrier, and large absorption coefficients. However, the toxicity long interlamellar distance of 2D limit wide application in sensitivity detection. Herein, we demonstrate stable toxicity-reduced perovskite single crystals (SCs) realized by interlamellar-spacing engineering via a distortion self-balancing strategy. The engineered low-toxicity SC detectors achieve stability, mobility-lifetime product, therefore high-performance Specifically, exhibit record 13488 μC Gy
Language: Английский
Citations
3
Small, Journal Year: 2024, Volume and Issue: 20(44)
Published: July 4, 2024
Abstract Manganese halides are one of the most potential candidates for large‐area flat‐panel detection owing to their biological safety and all‐solution preparation. However, reducing photon scattering enhancing efficient luminescence scintillator screens remains a challenge due uncontrollable crystallization serious nonradiative recombination. Herein, an organic cation modulation is reported control process enhance properties manganese halides. Given industrial requirements X‐ray detector, A 2 MnBr 4 screen (900 cm ) with excellent uniformity blade‐coated at 60 °C. Theoretical calculations in situ measurements reveal that cations larger steric hindrance can slow down screen, thus neatening crystal arrangement scattering. Moreover, also endow material higher exciton binding energy, which beneficial restraining Therefore, BPP (BPP = C 25 H 22 P + exhibits superior spatial resolution (>20 lp mm −1 ultra‐low limit (< 250 nGy air s ). This first time used screens, it believes this study will provide some guidance development high‐performance halide scintillators.
Language: Английский
Citations
3
ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(7), P. 3034 - 3042
Published: June 14, 2024
Here we report the self-assembly of 3D perovskites and 2D layered into large core–shell heterocrystals with well-defined interfaces a controlled shell thickness. The core possesses desirable X-ray responsive optoelectronic properties, while hydrophobic organic spacers in can suppress ion migration prevent direct exposure to moisture. Notably, detectors using these exhibit ultralow dark current drift 1.1 × 10–7 nA cm–1 s–1 V–1, which is 5 orders magnitude lower than that pristine perovskite devices. Moreover, devices also display significantly enhanced response, including high sensitivity 1 104 μC Gyair–1 cm–2, low detection limit 40 nGyair s–1, capacity for high-resolution imaging. By realizing heterocrystals, this work paves way developing high-performance stability sensitivity.
Language: Английский
Citations
2
Journal of Luminescence, Journal Year: 2024, Volume and Issue: unknown, P. 120914 - 120914
Published: Sept. 1, 2024
Language: Английский
Citations
2
Small Structures, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 17, 2024
Metal halide perovskites have emerged as excellent direct X‐ray detection materials owing to their large mobility‐lifetime product, strong radiation absorption, and low‐cost preparation. However, it is still a challenge achieve stable due the limitations associated with severe ion migration under high voltage bias. Herein, based on bromine substitution strategy suppress migration, 2D alternating cations intercalation‐type (ACI) perovskite, ( R ‐MPA)(BrEA)PbBr 4 1 , ‐MPA = methylphenethylamm‐onium; BrEA 2‐bromoethylamine) reported detection. Specifically, introducing Br atom forms additional intermolecular interactions (i.e., Br···π) enhances hydrogen bonding interactions, greatly improving structure stability. Based this enhanced interaction, presents higher activation energy of (1.05 eV) than that ‐MPA)EAPbBr resulting in lower dark current drift 9.17 × 10 −8 nA cm −1 s V revealing suppression migration. Consequently, ‐based detector shows sensitivity 2653.7 μC Gy −2 and, most importantly, outstanding operational environmental stability, maintaining ≈91% its initial at 50 bias after 90 days air. This work demonstrates an efficient for halogen via ACI
Language: Английский
Citations
2
Advanced Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 2, 2024
Abstract Halide perovskites (HPs) have demonstrated excellent direct X‐ray detection performance. Lead‐free perovskite polycrystalline wafers outstanding advantages in large‐area imaging applications due to their area‐scalability, thickness‐controllability, large bulk resistivity, and ease of integration with thin film transistor arrays. However, currently lead‐free possess low sensitivity, typically less than 1000 µC Gy −1 cm −2 , which severely limits applications. Here, high‐quality scale AG 3 Bi 2 I 9 (AG: aminoguanidinium) short intercluster distances are successfully prepared using a hot‐pressing method. The high mobility‐lifetime product 5.66 × 10 −3 V therefore achieve sensitivity 2675 can be comparable those the single crystal counterpart reported by previous research (7.94 5791 ), represent best results HP wafers. Besides, exhibit limit as 11.8 nGy s long‐term working stability, spatial resolution 5.9 lp mm imaging. findings demonstrate that feasible for high‐performance system.
Language: Английский
Citations
2
Composites Science and Technology, Journal Year: 2024, Volume and Issue: 255, P. 110700 - 110700
Published: June 10, 2024
Language: Английский
Citations
1
ACS Materials Letters, Journal Year: 2024, Volume and Issue: unknown, P. 4841 - 4846
Published: Sept. 26, 2024
Language: Английский
Citations
1
physica status solidi (RRL) - Rapid Research Letters, Journal Year: 2024, Volume and Issue: 19(2)
Published: Oct. 2, 2024
Perovskite materials, renowned for their high mean atomic number, charge carrier mobility–lifetime product, and X‐ray absorption coefficient, have emerged as exceptional candidates the fabrication of high‐sensitivity detectors. Herein, a BA 2 PbBr 4 /MAPbBr 3 heterojunction is epitaxially grown, with ion migration effectively suppressed through passivation surface defects 3D heterojunction. Additionally, presence an internal electric field within facilitated extraction accumulation photoinduced carriers, further enhancing device sensitivity (5964.05 μC Gy −1 cm −2 ). The fabricated 2D/3D perovskite devices show outstanding self‐driven detection performance at 0 V mm bias (1195.5 ), surpassing that α‐Se detectors (20 proposed method relatively simple therefore expected to contribute commercialization perovskite‐based
Language: Английский
Citations
1