Polar 3D Perovskitiod Constructed by Asymmetric Diamine for Stable Self‐Driven X‐Ray Detection DOI
Ailin Wang, Chengshu Zhang,

Qianwen Guan

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 27, 2024

Abstract Polar 3D organic–inorganic hybrid perovskites (OIHPs) with the bulk photovoltaic effect (BPVE) have important application value in self‐driven X‐ray detection, due to their excellent semiconductor properties. However, A‐site cations are limited by tolerance factor, making it difficult construct ABX 3 ‐type polar perovskites. Therefore, is necessary explore perovskitiods properties for detection. Herein, introducing an asymmetric diamine 3‐methylaminopropylamine (3‐MAPA) cation, a perovskitiod, (3‐MAPA)Pb 2 Br 6 ( 1 ) successfully constructed. Specifically, dipole‐oriented arrangement and intrinsic polarity of 3‐MAPA endow non‐centrosymmetric structure single crystal (SC). Notably, under irradiation, SC exhibits remarkable 0.8 V, which beneficial Consequently, ‐based detector shows sensitivity 101 µC Gy −1 s low detection limit 189 nGy at 0 V bias. Meanwhile, SC‐based less ion migration abundant N─H···Br hydrogen bonding interaction within structure, leading smaller dark current drift, supports stable This study attains based on perovskitiods, enriches candidates detectors.

Language: Английский

Flexible Single Microwire X‐Ray Detector with Ultrahigh Sensitivity for Portable Radiation Detection System DOI

Yancheng Chen,

Shifeng Niu, Ying Li

et al.

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

Published: Aug. 19, 2024

Abstract Sensitive, flexible, and low false alarm rate X‐ray detector is crucial for medical diagnosis, industrial inspection, scientific research. However, most semiconductors detectors are susceptible to interference from ambient light, their high thickness hinders application in wearable electronics. Herein, a flexible visible‐blind ultraviolet‐blind based on Indium‐doped Gallium oxide (Ga 2 O 3 :In) single microwire prepared. Joint experiment−theory characterizations reveal that the Ga :In possess crystal quality, large band gap, satisfactory stability, reliability. On this basis, an extraordinary sensitivity of 5.9 × 10 5 µC Gy air −1 cm −2 detection limit 67.4 nGy s achieved prepared Ag/Ga :In/Ag device, which has outstanding operation stability excellent temperature stability. Taking advantage properties microwire, portable system demonstrated shows potential adapt lightweight formats. The proposed enables real‐time monitor X‐rays, can be displayed user interface. More importantly, it resistance natural light interference, showing rate. This work provides feasible method exploring high‐performance integrated micro/nano devices.

Language: Английский

Citations

10
Novel Self‐Powered Sensitive X‐Ray Detection Crystal Bi2Mo0.36W1.64O9 with Effective Functional Motif Coupling in a Quasi‐2D Perovskite Structure DOI Open Access
Lishan Liu, Hongyao Zhou, Jingquan Liu

et al.

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

Published: Jan. 21, 2025

Abstract The demand for medical imaging with reduced patient dosage and higher resolution is growing, driving the need advanced X‐ray detection technologies. This paper proposes a design paradigm semiconductors by coupling constituent motifs through crystal structure engineering. study introduces strongly anisotropic Aurivillius‐type quasi‐2D perovskite structure, combining [Bi 2 O ] 2+ groups stereochemically active lone pair electrons (SCALPEs) [W/Mo 7 2− anionic groups, enabling enhanced Compton scattering self‐powered capabilities local electric field ordering. results in first Bi‐based tungstate Bi Mo 0.36 W 1.64 9 (BMWO) detector, achieving record sensitivity of 381 µC Gy −1 cm −2 . Additionally, demonstrates capability detector operating self‐driven mode. work highlights BMWO as promising candidate stable direct validates material strategy that leverages large anisotropy structures sensitive detection.

Language: Английский

Citations

0
Methylhydrazine Lone‐Pair Engineering for Polar Lead‐Free Perovskite Enables Self‐Powered X‐Ray Detection DOI Creative Commons
Ruiqing Li, Jianbo Wu,

Zeng‐Kui Zhu

et al.

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

Published: March 11, 2025

Lead‐free A 3 Bi 2 I 9 ‐type perovskites demonstrate excellent performance in direct X‐ray detection owing to their high bulk resistivity and reduced ion migration. However, the reported centrosymmetric can only operate with external voltage, inevitably resulting energy consumption bulky monolithic circuits, limiting further development. Herein, exploiting methylhydrazine (MHy) cation s lone‐pair electrons (LPEs), a chiral‐polarity perovskite MHy are obtained explored its self‐powered properties. Where forms strong hydrogen bond interaction inorganic framework, asymmetric unit. Meanwhile, LPEs contribute generating dipole moments, leading spontaneous polarization. On one hand, polarization acts as driving force realize X‐ray‐generated carriers’ separation transport acquire ability. other noise current dark under zero bias increase signal‐to‐noise ratio lower limit. Notably, single‐crystal‐based detector displays considerable sensitivity (106 μC Gy −1 cm −2 ) an ultralow limit (55 nGy mode. new insights for constructing polar lead‐free realizing unprecedented detectors provided.

Language: Английский

Citations

0
Stable Self-powered X-ray Detection with Low Detection Limit By a Green Halide Hybrid Perovskite Ferroelectric Crystal DOI Creative Commons
Yueying Wang,

Qianwen Guan,

Zeng‐Kui Zhu

et al.

Chemical Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

The remarkable FE-PV effect driven stable and self-powered X-ray detection in a green halide hybrid ferroelectric crystal [H 2 mdap]BiBr 5 with relatively high sensitivity, low limit, good stability, advancing towards safer more detection.

Language: Английский

Citations

0
3D Lead‐Free Double Perovskite via Anchoring A‐Site Cation for Ultralow Dose and Stable X‐Ray Detection DOI

Qingshun Fan,

Haojie Xu,

Zeng‐Kui Zhu

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Abstract 3D lead‐free hybrid double perovskites exhibit remarkable potential for direct X‐ray detection owing to their strong photon attenuation capabilities, efficient charge mobility, and low‐cost fabrication. However, the development of new based on large organic cations remains challenging due Goldschmidt tolerance factor constraint, which impedes further exploration in radiation detection. Herein, a perovskite (Mor) 2 RbSbI 6 ( 1 , Mor = morpholinium) is synthesized, featuring dense framework anchored by A‐site cations. The high‐quality single crystals present high mobility‐lifetime product (1.52 × 10 −3 cm V −1 ) low dark current drift, enabling it achieve simultaneously sensitivity (1.09 4 µC Gy air −2 an ultralow limit (3.1 nGy s under identical operating voltage. Meanwhile, cation anchoring strategy prevents ion migration‐induced structural collapse during detection, thereby improving its hardness stability. These findings provide crystal insights design types materials “green” high‐performance detectors.

Language: Английский

Citations

0
Evidence of Cation Symmetry Reduction Induced Bulk Photovoltaic Effect in Metal‐Free Perovskite for Efficient Self‐Powered X‐Ray Detection DOI
Guoqiang Peng, Zhenhua Li, Youkui Xu

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 10, 2025

Abstract Metal‐free perovskite (MFP) X‐ray detectors have attracted attention due to biocompatibility and synthesizability. However, the necessity of high voltages for MFP affects stability safety. Although, bulk photovoltaic effect (BPVE) with spontaneous electric field is a potential alternative detection without voltage, constitutive relationship BPVE in remains unclear. Herein, between cation symmetry explored, self‐powered detector realized by first time. Theoretical studies show that reduction can distort halide octahedron one direction, which increases dipole moment crystal polarity induce BPVE. The from drive defect passivation equilibrium carrier enhance nonequilibrium performance Then, polar (mPAZE‐NH 4 Br 3 H 2 O) excellent designed. Due nonlinear response, obtains numerically recorded equivalent sensitivity (≈10 µC Gy air −1 cm −2 ) at 0 V. Moreover, imaging demonstrated two image convolution kernels it are constructed. Finally, features continuous operation (20000 s) temperature (‐55–250 °C). It believed method will further application detectors.

Language: Английский

Citations

0
Phase Transition and Luminescent Property Change Induced by Different Organic Cations in One-Dimensional Double Perovskites DOI

Qingjie Zhou,

Peng Cao, Zining Zhou

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(19), P. 8846 - 8852

Published: May 2, 2024

Double perovskites (DPs) have attracted attention in the field of luminescence due to their inherent broadband emission self-trapping excitons. In this work, we choose [(CH3)3NCH2CHCH2]+ and [CH3CHOHCH2NH2]+ as organic cations synthesize two new organic–inorganic hybrid DPs, [(CH3)3NCH2CHCH2]2KInCl6 (1) [CH3CHOHCH2NH2]2KInCl6 (2). The [KCl6]3– [InCl6]3– octahedra are interchangeably connected by sharing opposite faces, forming a one-dimensional coordination chain. Each K atom coordinates with six chlorine atoms 1, while it oxygen addition 2. between ions O compound 2 may significantly reduced its luminescence. As result, 1 shows bright-yellow light quantum yield more than 90%, weak blue only 0.98%. addition, different from no phase transition found 2, undergoes reversible at 324/307 heating–cooling cycle. Through structural spectral analysis density functional theory calculation, conclude that larger degree octahedral distortion anion distance (In···In) also cause PLQY be higher

Language: Английский

Citations

3
Pyro-phototronic Effect Enhanced Self-Powered Photoresponse in Lead-Free Hybrid Perovskite DOI
Dongying Fu, Yanli Ma, Shufang Wu

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(44), P. 60616 - 60624

Published: Oct. 25, 2024

Pyro-phototronic effect (PPE) can significantly boost the performance of hybrid perovskite (HPs) photodetectors due to effective modulation photogenerated charge carrier separations, transportation, and extraction. However, there are few reports on application PPE in lead-free HPs. Herein, a polar HP (1,3-BMACH)BiBr5 [1,3-BMACH = 1,3-bis(aminomethyl)cyclohexane] is synthesized realized broadband self-powered photoresponse from X-rays near-infrared (NIR) through PPE. Particularly, this light-induced HPs breaks limitation optical band gap, making them suitable for photodetection. Under 405 nm illumination, compared with purely photovoltaic system, Iphoto+pyro boosted by 3100%, R D* both enhanced 260% after coupled It particularly interesting that an obvious X-ray-induced phenomenon also observed, which endows high sensitivity 154 μC Gy–1 cm–2 low detection limit 307 nGy s–1 under mode. The implementation NIR provides new approach constructing environmentally friendly, broadband, optoelectronic devices future.

Language: Английский

Citations

1
Non-Centrosymmetric Chiral Structures for Hybrid Bismuth Halides With Stable Self-Driven X-Ray Detection DOI
Yutian Lei, Yumin Li, Guoqiang Peng

et al.

IEEE Electron Device Letters, Journal Year: 2024, Volume and Issue: 45(8), P. 1441 - 1444

Published: June 21, 2024

Language: Английский

Citations

0
Polar 3D Perovskitiod Constructed by Asymmetric Diamine for Stable Self‐Driven X‐Ray Detection DOI
Ailin Wang, Chengshu Zhang,

Qianwen Guan

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 27, 2024

Abstract Polar 3D organic–inorganic hybrid perovskites (OIHPs) with the bulk photovoltaic effect (BPVE) have important application value in self‐driven X‐ray detection, due to their excellent semiconductor properties. However, A‐site cations are limited by tolerance factor, making it difficult construct ABX 3 ‐type polar perovskites. Therefore, is necessary explore perovskitiods properties for detection. Herein, introducing an asymmetric diamine 3‐methylaminopropylamine (3‐MAPA) cation, a perovskitiod, (3‐MAPA)Pb 2 Br 6 ( 1 ) successfully constructed. Specifically, dipole‐oriented arrangement and intrinsic polarity of 3‐MAPA endow non‐centrosymmetric structure single crystal (SC). Notably, under irradiation, SC exhibits remarkable 0.8 V, which beneficial Consequently, ‐based detector shows sensitivity 101 µC Gy −1 s low detection limit 189 nGy at 0 V bias. Meanwhile, SC‐based less ion migration abundant N─H···Br hydrogen bonding interaction within structure, leading smaller dark current drift, supports stable This study attains based on perovskitiods, enriches candidates detectors.

Language: Английский

Citations

0