Perovskite materials in X-ray detection and imaging: recent progress, challenges, and future prospects

RSC Advances, Journal Year: 2024, Volume and Issue: 14(10), P. 6656 - 6698

Published: Jan. 1, 2024

Perovskite-based X-ray detection and imaging have reached new milestones due to rapid advancements in evolution of materials, cost-effective fabrication techniques, architectural modifications device design.

Language: Английский

---

Lead‐Free Perovskite Single Crystal Linear Array Detector for High‐Resolution X‐Ray Imaging

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(24)

Published: March 30, 2024

Abstract 0D Bi‐based 329‐type halide perovskite is demonstrated as a promising semiconductor for X‐ray detection due to its strong absorption, superior stability, availability of large single crystals (SCs) and solution processibility at low temperature. However, mobility‐lifetime product ( µτ ) limits further improvement in sensitivity. Based on the first‐principles calculations, this work designs new 2D using mixed‐halide‐induced structural dimension regulation strategy. By continuous supply precursor solution, successfully grows inch‐sized high‐quality SCs. These SCs exhibit product, high resistivity, ion migration. The detectors fabricated show sensitivity 24,509 µC Gy air −1 cm −2 , short response time 315 µs, limit 4.3 nGy s stability. properties are best among all lead‐free comparable those lead‐based detectors. linear array detector assembled first also shows spatial resolution 10.6 lp mm during imaging. performance combined with stability these expected promote generation technologies.

Language: Английский

---

Molecular Design of Layered Hybrid Silver Bismuth Bromine Single Crystal for Ultra‐Stable X‐Ray Detection With Record Sensitivity

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

---

Heterointerface Design of Perovskite Single Crystals for High‐Performance X‐Ray Imaging

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(3)

Published: Oct. 25, 2023

Metal halide perovskite single crystals (MHP-SCs) are known for their facile fabrication into large sizes using inexpensive solution methods. Owing to combination of mobility-lifetime products and strong X-ray absorption, they considered promising materials efficient detection. However, suffer from dark currents severe ion migration, which limit sensitivity stability in critical detection applications. Herein, a heterointerface design is proposed reduce both the current migration by forming heterojunction. In addition, carrier transport performance significantly improved engineering designing gradient band structure SCs. The SC heterojunction detectors exhibit high 3.98 × 10

Language: Английский

---

Three‐Dimensional Polar Perovskites for Highly Sensitive Self‐Driven X‐Ray Detection

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(11)

Published: Jan. 10, 2024

Abstract Three‐dimensional (3D) organic–inorganic hybrid perovskites (OIHPs) have achieved tremendous success in direct X‐ray detection due to their high absorption coefficient and excellent carrier transport. However, owing the centrosymmetry of classic 3D structures, these reported detectors mostly require external electrical fields run, resulting bulky overall circuitry, energy consumption, operational instability. Herein, we first report unprecedented radiation photovoltage OIHP for efficient self‐driven detection. Specifically, polar MhyPbBr 3 ( 1 , Mhy=methylhydrazine) shows an intrinsic (0.47 V) large mobility‐lifetime product (1.1×10 −3 cm 2 V −1 ) under irradiation. Strikingly, physical characteristics endow with sensitive performance, showing a considerable sensitivity 220 μC Gy −2 which surpasses those most detectors. This work explores highly OIHPs, shedding light on future practical applications.

Language: Английский

---

Stereo‐Hindrance Engineering of A Cation toward <110>‐Oriented 2D Perovskite with Minimized Tilting and High‐Performance X‐Ray Detection

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(23)

Published: Feb. 28, 2024

Abstract 2D <100>‐oriented Dion–Jacobson or Ruddlesden–Popper perovskites are widely recognized as promising candidates for optoelectronic applications. However, the large interlayer spacing significantly hinders carrier transport. <110>‐oriented naturally exhibit reduced spacings, but tilting of metal halide octahedra is typically serious and leads to poor charge Herein, a perovskite EPZPbBr 4 (EPZ = 1‐ethylpiperazine) with minimized designed through A‐site stereo‐hindrance engineering. The piperazine functional group enters space enclosed by three [PbBr 6 ] 4− octahedra, pushing Pb─Br─Pb closer straight line (maximum angle ≈180°), suppressing well electron–phonon coupling. Meanwhile, ethyl located between layers contributes an extremely effective distance (2.22 Å), further facilitating As result, simultaneously demonstrates high µτ product (1.8 × 10 −3 cm 2 V −1 ) resistivity (2.17 Ω cm). assembled X‐ray detector achieves low dark current 1.02 −10 A −2 sensitivity 1240 µC Gy under same bias voltage. realized specific detectivity (ratio noise density, 1.23 8 −1/2 highest among all reported detectors.

Language: Английский

---

Ionizing Radiation Responsive Anomalous Photovoltage Drives Sensitive Self‐Powered X‐Ray Detection

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(16)

Published: Jan. 2, 2024

Abstract The anomalous photovoltaic (APV) effect in organic–inorganic hybrid perovskites (OIHPs) has attracted massive interest for developing high‐performance optoelectronic devices. However, exploring the ionizing radiation responsive APV remains blank, let alone its potential applications. Herein, unprecedented behavior a 1D lead‐free OIHP, (4‐AMP)BiI 5 ( ABI , 4‐AMP = 4‐(aminomethyl)pyridine) under X‐ray irradiation is reported, exhibiting large above‐bandgap bulk photovoltage of ≈10 V. Such strong closely related to intrinsic electric polarization polar which acts as driving force X‐ray‐generated carriers’ separation and transport, thus allowing it be self‐powered. As result, sensitive self‐powered detectors based on high‐quality single crystals are successfully fabricated, possessing high sensitivity 66.84 µC Gy −1 cm −2 low detection limit 482 nGy s superior operational stability. This work first demonstrates radiation‐responsive OIHPs, further enables passive detection.

Language: Английский

---

Advancements and future directions in defect passivation for perovskite solar cells

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 999, P. 174990 - 174990

Published: May 26, 2024

Language: Английский

---

Pyro‐Phototronic Effect Induced Circularly Polarized Light Detection with a Broadband Response

Advanced Science, Journal Year: 2024, Volume and Issue: unknown

Published: July 23, 2024

Photopyroelectric-based circularly polarized light (CPL) detection, coupling the pyro-phototronic effect and chiroptical phenomena, has provided a promising platform for high-performance CPL detectors. However, as novel detection strategy, photopyroelectric-based is currently restricted by short-wave optical response, underscoring urgent need to extend its response range. Herein, visible-to-near-infrared induced first realized in chiral-polar perovskites. Specifically, multilayered perovskites (S-BPEA)

Language: Английский

---

Promoting Band Splitting through Symmetry Breaking in Inorganic Halide Perovskite Single Crystals for High-Sensitivity X-ray Detection

ACS Energy Letters, Journal Year: 2023, Volume and Issue: 8(11), P. 4836 - 4847

Published: Oct. 24, 2023

We propose a band-splitting strategy driven by breaking the crystal structure symmetry partially replacing Br– ions with larger I– in CsPbBr3 single (SC). Experimental results show that photoelectric properties of band-split SCs are significantly improved due to asymmetric and distinct band splitting, which inhibits ion migration promotes transport carriers, respectively. It is found exhibit higher resistivity, mobility-lifetime product, lower than pristine SCs. Therefore, detectors fabricated on achieved record X-ray detection sensitivity 2.8 × 105 μC Gy–1 cm–2 for inorganic perovskite, low limit 18 nGy s–1, high resolution 12.7 lp mm–1 imaging. In addition, stability SC has also been improved, still (1.2 104 cm–2) at temperatures up 100 °C.

Language: Английский

---