Metal-Free Hydrazinium Halide Perovskitoid Single Crystals for X-ray Detection DOI
Zhizai Li,

Shenghuan Shi,

Guoqiang Peng

et al.

Nano Letters, Journal Year: 2023, Volume and Issue: 23(21), P. 9972 - 9979

Published: Oct. 20, 2023

Metal-free perovskitoids (MFPs) with N2H5+ as B-site component possess higher crystal density and hydrogen bonding networks have been recently expanded into X-ray detection. However, research on this material is in its infancy lacks an understanding of the function halide components physical properties device performance. Here, N2H5-based MFP single crystals (SCs) different halides are fabricated, influence structure, band nature, charge transport characteristics, final performance actively explored. Based theory experiments, tolerance factor octahedral jointly determine composition. Further, electronegativities ionic radii also affect distortion energy bending, further influencing carrier Finally, a sensitivity 1284 μC Gyair-1 cm-2 low detection limits (LoD) 5.62 μGyair s-1 were obtained by Br-based due to superior properties.

Language: Английский

Two-Dimensional Metal Halides for X-Ray Detection Applications DOI Creative Commons

Yumin Li,

Yutian Lei, Haoxu Wang

et al.

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: May 20, 2023

Abstract Metal halide perovskites have recently emerged as promising candidates for the next generation of X-ray detectors due to their excellent optoelectronic properties. Especially, two-dimensional (2D) afford many distinct properties, including remarkable structural diversity, high energy, and balanced large exciton binding energy. With advantages 2D materials perovskites, it successfully reduces decomposition phase transition perovskite effectively suppresses ion migration. Meanwhile, existence a hydrophobic spacer can block water molecules, thus making obtain stability. All these attracted much attention in field detection. This review introduces classification summarizes synthesis technology performance characteristics direct detector, briefly discusses application scintillators. Finally, this also emphasizes key challenges faced by practical presents our views on its future development.

Language: Английский

Citations

65
Molecular Design of Layered Hybrid Silver Bismuth Bromine Single Crystal for Ultra‐Stable X‐Ray Detection With Record Sensitivity DOI
Huanyu Chen, Zhenhua Li, Shuo Wang

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(6)

Published: Nov. 28, 2023

Abstract Nowadays, weak interlayer coupling and unclear mechanism in layered hybrid silver bismuth bromine (LH‐AgBiBr) are the main reasons for limiting its further enhanced X‐ray detection sensitivity stability. Herein, design rules LH‐AgBiBr influence on performance reported first time. Although shortening amine size can enhance coupling, is severely hampered by easier defect formation caused enlarged micro strain. In contrast, an appropriate divalent endows material with improved released strain, which benefits crystal stability mechanical hardness. Another contribution to increase density dielectric constant; thus, enhancing absorption carrier transport. Consequently, optimized parallel device based BDA 2 AgBiBr 8 achieves a record of 2638 µC Gy air −1 cm −2 ultra‐low limit 7.4 nGy s , outperforming other detectors. Moreover, unencapsulated displays remarkable anti‐moisture, anti‐thermal (>150 °C), anti‐radiation (>1000 ) endurance. Eventually, high‐resolution hard imaging demonstrated linear detector arrays under benign dose rate (1.63 µGy low external bias (5 V). Hence, these findings provide guidelines future materials optimization.

Language: Английский

Citations

29
Low‐Dose and Stable X‐Ray Imaging Enabled by Low‐Dimensional Dion‐Jacobson Perovskites DOI

Deyu Xin,

Min Zhang,

Zhenghui Fan

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(38)

Published: March 21, 2024

Abstract Metal halide perovskites have emerged as highly promising candidates for next‐generation X‐ray detectors due to their facile and low‐cost processability, high attenuation coefficient, tunable optoelectrical properties. In this work, quasi‐2D Dion‐Jacobson (DJ) are introduced in a flat panel imager (FPXI) imaging. This study demonstrates that the diammonium interlayers DJ play key role enhancing structural stability, suppressing ion migration, improving charge transport. As result, perovskite‐based FPXIs achieve sensitivity of 18000 µC Gy air −1 cm −2 , low detection limit 5.7 nGy s representing performance comparable state‐of‐the‐art 3D perovskite FPXIs. Thanks decrease signal crosstalk effect FPXIs, spatial resolution 0.54 line‐pair‐per‐pixel is achieved, which higher than Remarkably, high‐quality imaging achieved at total dose 20 µGy only 1/5 typically used commercial equipment. work not provides valuable insights guidance fabrication 2D but also lays groundwork adoption high‐performance, stable imagers novel flat‐panel detectors.

Language: Английский

Citations

14
Pyroelectric Photoconductive Diode for Highly Sensitive and Fast DUV Detection DOI
Xiaohu Hou, Yan Liu, Shiyu Bai

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(25)

Published: April 2, 2024

Abstract Detecting high‐energy photons from the deep ultraviolet (DUV) to X‐rays is vital in security, medicine, industry, and science. Wide bandgap (WBG) semiconductors exhibit great potential for detecting photons. However, implementation of highly sensitive high‐speed detectors based on WBG has been a huge challenge due inevitable level traps lack appropriate device structure engineering. Here, fast pyroelectric photoconductive diode (PPD), which couples interface effect with tailored polycrystal Ga‐rich GaOx (PGR‐GaOx) Schottky photodiode, first proposed. The PPD exhibits ultrahigh detection performance DUV X‐ray light. responsivity light sensitivity are up 10 4 A W −1 5 µ C Gy air cm −2 , respectively. Especially, induced by polar symmetry depletion region PGR‐GaOx can significantly improve response speed times. Furthermore, demonstrated imaging enhancement systems low power consumption high sensitivity. This work fully excavates provides novel design strategy achieve detectors.

Language: Английский

Citations

14
Molecularly thin, two-dimensional all-organic perovskites DOI
Hwa Seob Choi, Jun Lin, Gang Wang

et al.

Science, Journal Year: 2024, Volume and Issue: 384(6691), P. 60 - 66

Published: April 4, 2024

Recently, the emergence of all-organic perovskites with three-dimensional (3D) structures has expanded potential applications perovskite materials. However, synthesis and utilization in 2D form remain largely unexplored because design principle not been developed. We present successful a metal-free layered perovskite, denoted as Choi-Loh van der Waals phase (CL-v phase), chemical formula A

Language: Английский

Citations

11
Cesium‐Based Molecular Perovskites With Superior Stability for High‐Performance X‐Ray Detection DOI Open Access
Liang Wu, Qingsong Wei,

Yi‐Ming Di

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 16, 2025

Metal-free molecular perovskites have shown great potential for X-ray detection due to their tunable chemical structures, low toxicity, and excellent photophysical properties. However, limited absorption environmental instability restrict practical application. In this study, cesium-based (MDABCO-CsX3, X = Cl, Br, I) are developed by introducing Cs+ at the B-site enhance while retaining toxicity. The effects of halide modulation on physical properties device performance systematically investigated. Among variants, MDABCO-CsBr3 exhibited superior stability, attributed optimal ionic radius high stability Br-. This is further enhanced a higher tolerance factor, which promotes stable 3D cubic structure suppresses ion migration within crystal. Consequently, MDABCO-CsBr3-based detectors demonstrated reduced migration, minimal dark current drift, response under exposure, achieving sensitivity 4124 µC Gy-1 cm-2 limit 0.45 µGy s-1. Moreover, devices exhibit thermal operating effectively temperatures up 130 °C. These results highlight as promising candidate efficient detection, expanding applicability in advanced radiation technologies.

Language: Английский

Citations

1
Enhanced thermodynamic stability and carrier lifetime in BF4 -doped wide-band-gap perovskite solar cells DOI
Zhong-Yuan Wang, K. L. Wang,

Jun-Jie Jin

et al.

Physical review. B./Physical review. B, Journal Year: 2024, Volume and Issue: 110(4)

Published: July 23, 2024

Language: Английский

Citations

7
High Sensitivity X‐Ray Detectors with Low Degradation Based on Deuterated Halide Perovskite Single Crystals DOI

Lishan Liu,

Mingxia Xu,

Xinguang Xu

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(44)

Published: Sept. 16, 2024

Abstract Methylammonium lead single crystal (MAPbI 3 SC) possesses superior optoelectronic properties and low manufacturing cost, making it an ideal candidate for X‐ray detection. However, the ionic migration of perovskites usually leads to instability, dark current drift, hysteresis detector, limiting their applications in well‐established technologies. Here, a series detectors MAPbI SCs are reported with different degrees deuteration (D x , = 0, 0.15, 0.75, 0.99). By controlling content deuterium (D) organic cations, sensitivity, detection limits, ion migration, resistivity detector can be controlled, thereby improving its performance. Due stronger hydrogen bonds (N─D···I), activation energy significantly increases 886 meV. Consequently, D 0.99 SC shows more than five‐fold enhancement, achieving record‐high mobility–lifetime (µ τ ) product 5.39 × 10 −2 cm 2 V −1 ultrahigh sensitivity 2.18 6 µC Gy under 120 keV hard limit 4.8 nGy air s as well long‐term stability. The study provides straightforward strategy constructing ultrasensitive imaging systems based on perovskite SCs.

Language: Английский

Citations

7
Tailoring Multi‐Phenyl Ring Cation for Stable Scalable Hybrid Bismuth Iodide Amorphous Film: Enabling Record Sensitivity and High‐Performance X‐Ray Array Imaging DOI
Youkui Xu, Zhenhua Li,

Chang Shi

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(33)

Published: June 22, 2024

The 329-type bismuth (Bi)-based metal halide (MH) polycrystalline films have potential to be applied in the new generation of X-ray imaging technology owing high absorption coefficients and excellent detection properties. However, mutually independent [Bi

Language: Английский

Citations

6
Surface Passivation toward Multiple Inherent Dangling Bonds in Indium Phosphide Quantum Dots DOI

Zhe Sun,

Qinggang Hou,

Jiahua Kong

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(14), P. 6396 - 6407

Published: March 26, 2024

Indium phosphide (InP) quantum dots (QDs) have become the most recognized prospect to be less-toxic surrogates for Cd-based optoelectronic systems. Due particularly dangling bonds (DBs) and undesirable oxides, photoluminescence performance stability of InP QDs remain improved. Previous investigations largely focus on eliminating P–DBs resultant surface oxidation states; however, little attention has been paid adverse effects In–DBs QDs. This work demonstrates a facile one-step peeling passivation treatment method both In- Meanwhile, may also effectively support encapsulation ZnSe shell. Finally, generated InP/ZnSe display narrower full width at half-maximum (fwhm) ∼48 nm, higher yields (PLQYs) ∼70%, superior stability. enlarges chemistry engineering consideration considerably promotes development efficient stable devices.

Language: Английский

Citations

5