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

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(11)

Опубликована: Янв. 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.

Язык: Английский

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

Advanced Functional Materials, Год журнала: 2024, Номер 34(16)

Опубликована: Янв. 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.

Язык: Английский

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

Advanced Science, Год журнала: 2024, Номер unknown

Опубликована: Июль 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)

Язык: Английский

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Bulk Photovoltaic Effect in Two-Dimensional Distorted MoTe₂

ACS Nano, Год журнала: 2023, Номер 17(18), С. 17884 - 17896

Опубликована: Сен. 1, 2023

In future solar cell technologies, the thermodynamic Shockley-Queisser limit for solar-to-current conversion in traditional p-n junctions could potentially be overcome with a bulk photovoltaic effect by creating an inversion broken symmetry piezoelectric or ferroelectric materials. Here, we unveiled mechanical distortion-induced behavior two-dimensional (2D) material, MoTe2, caused phase transition and MoTe2. The from single-crystalline semiconducting 2H-MoTe2 to semimetallic 1T'-MoTe2 was confirmed using X-ray photoelectron spectroscopy (XPS). We used micrometer-scale system measure absorption of energy, which reduced 800 63 meV during transformation hexagonal distorted octahedral revealed smaller bandgap behavior. Experimentally, large response is anticipated maximum photovoltage VOC = 16 mV positive signal ISC 60 μA (400 nm, 90.4 Wcm-2) absence external electric field. values both R EQE were found 98 mAW-1 30%, respectively. Our findings are distinctive features photocurrent responses in-plane polarity its potential wide pool established TMD-based nanomaterials cutting-edge approach optimize efficiency converting photons-to-electricity power harvesting optoelectronics devices.

Язык: Английский

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Room-Temperature Photoferroelectrics Semiconductor Driven by the Interlayer Confinement Effect

Chemistry of Materials, Год журнала: 2024, Номер 36(2), С. 994 - 1003

Опубликована: Янв. 3, 2024

With the assistance of ferroelectrochemistry theory, many multifunctional organic–inorganic hybrid perovskites (OIHPs) ferroelectrics have been designed and studied. However, research on regulating through interlayer confinement effect in two-dimensional (2D) OIHPs is still rare. Herein, we regulated strength by changing length alkyl chain organic cations, precisely constructed a lead bromide ferroelectric (IPA)2PbBr4 (IPA+ isopropylammonium) with high Curie temperature (Tc) 340.5 K spontaneous polarization (Ps) 3.16 μC/cm2 strong effect. Compared (Tp = 370.5 K), (IBA)2PbBr4 (IBA+ isobutylammonium, Tp 315 K) (IAA)2PbBr4 (IAA+ isoamylammonium, 271 crystallized centrosymmetric space group P21/c, Cmca at room (RT), respectively, while also having lower phase transition (Tp). More importantly, gradual decrease spacing from 10.47 Å (IAA)2PbBr4, 7.73 to 5.79 enhances effect, leading IBA+ IAA+ cations disordered state RT, IPA+ cation can be arranged an orderly directional manner. Due differences configuration, impacts degree distortion inorganic skeleton PbBr6 octahedra are different, ultimately reflected crystal structure. In short, arrangement order–disorder induce ferroelectricity skeleton. Additionally, single device based was assembled, which exhibits X-ray detection limit 102 nGy/s self-driven mode. This work provides effective strategy for designing high-temperature photoferroelectrics semiconductors.

Язык: Английский

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Unprecedented Ultraviolet Circularly Polarized Light‐Dependent Anomalous Photovoltaics in Chiral Hybrid Perovskites

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 15, 2025

Abstract Circularly Polarized Light (CPL)‐dependent anomalous photovoltaic effect (APVE), characterized by light helicity‐manipulated steady photocurrent and above‐bandgap photovoltage, has demonstrated significant potential in the fields of photoelectronic photovoltaics. However, exploiting CPL‐dependent APVE chiral hybrid perovskites, a promising family with intrinsic chiroptical activity non‐centrosymmetric structure, remains challenging. Here, leveraging flexible structural design alternating cations intercalation‐type APV, for first time, is achieved perovskites. Specifically, introducing lone pair electrons into organic layers to greatly amplify polarization, [(R)‐PPA](MOPA)PbBr 4 ( 2‐R ) (PPA = 1‐phenylpropylammonium, MOPA 3‐methoxypropylammonium) exhibit an photovoltage 6.50 V E g 3.01 eV) under ultraviolet (UV) illumination. Strikingly, profiting from natural optical unprecedented UV APV realized , driving high distinguishability between right‐hand left‐hand CPLs large anisotropy factor Iph 0.33. This study pioneers realization within perovskite, advancements optoelectronic device technologies.

Язык: Английский

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Chiral‐Achiral Cations Intercalation Induced Lead‐Free Chiral‐Polar Hybrid Perovskites Enable Self‐Powered X‐Ray and Ultraviolet–Visible–Near‐Infrared Photo Detection

Small, Год журнала: 2023, Номер 20(12)

Опубликована: Ноя. 10, 2023

Abstract Lead halide hybrid perovskites have made great progress in direct X‐ray detection and broadband photodetection, but the existence of toxic Pb demand for external operating voltage severely limited their further applications operational stability improvements. Therefore, exploring “green” lead‐free perovskite that can both achieve photodetection without is importance, remains challenging. Herein, using centrosymmetric (BZA) 3 BiI 6 ( 1 , BZA = benzylamine) as a template, pair chiral‐polar perovskites, 2 R / S ‐PPA)BiI 2‐ ‐PPA )‐1‐Phenylpropylamine) are successfully obtained by introducing chiral aryl cations )‐1‐Phenylpropylamine. Compared to presents significant irradiation‐responsive bulk photovoltaic effect (BPVE) with an open circuit photovoltage 0.4 V, which enables it self‐powered X‐ray, UV–vis‐NIR photodetection. Specifically, device exhibits ultralow limit 18.5 nGy s −1 excellent stability. Furthermore, first achieves broad‐spectrum (377–940 nm) via light‐induced pyroelectric effect. This work sheds light on rational crystal reconstruction engineering design toward high‐demanded radiation

Язык: Английский

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Radiation Photovoltaics in a 2D Multilayered Chiral‐Polar Halide Perovskite toward Efficient Self‐Driven X‐Ray Detection

Small, Год журнала: 2023, Номер 20(13)

Опубликована: Ноя. 15, 2023

Abstract 2D multilayered organic‐inorganic hybrid perovskites (OIHPs) have exhibited bright prospects for high‐performance self‐driven X‐ray detection due to their strong radiation absorption and long carrier transport. However, as an effective tool detection, photovoltaics remain rare, underdeveloped in OIHPs. Herein, chirality induce chiral OIHPs is first utilized efficient detection. Specifically, under irradiation, a chiral‐polar (S‐BPEA) 2 FAPb I 7 ( 1‐S , S‐BPEA = S )‐1‐4‐Bromophenylethylammonium, FA formamidinium) shows remarkable of 0.85 V, which endows excellent performance with considerable sensitivity 87.8 µC Gy air −1 cm −2 limit low 161 nGy s . Moreover, the high up 1985.9 80 V bias, higher than most those These results demonstrate that chirality‐induced strategy

Язык: Английский

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Manipulating Chiroptical Activities in 0D Chiral Hybrid Manganese Bromides by Solvent Molecular Engineering

Small, Год журнала: 2024, Номер unknown

Опубликована: Май 20, 2024

Abstract 0D hybrid metal halides (0D HMHs) with fully isolated inorganic units provide an ideal platform for studying the correlations between chiroptical activities and crystal structures at atomic levels. Here, through incorporation of different solvent molecules, a series chiral manganese bromides ( RR/SS ‐C 20 H 28 N 2 ) 3 MnBr 8 ·2X (X = C 5 OH, CH or O) are synthesized to elucidate their properties. They show negligible circular dichroism signals Mn absorptions due 2v ‐symmetric [MnBr 4 ] 2− tetrahedra. However, they display distinct circularly polarized luminescence (CPL) continuously increased asymmetry factors g lum from 10 −4 OH) −3 O). The value is structurally revealed originate enhancement 2‐ tetrahedral bond‐angle distortions, presence molecules. Furthermore, )MnBr ·H O enantiomers larger distortions tetrahedra based on hydrobromic acid‐induced structural transformation ·2H enantiomers. Therefore, such exhibit enhanced CPL | up 1.23 × −2 . This work provides unique insight into enhancing in HMH systems.

Язык: Английский

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X‐ray‐ultraviolet–visible‐near‐infrared photoresponses realized in a lead‐free hybrid perovskite ferroelectric through light‐induced ferro‐pyro‐phototronic effect

InfoMat, Год журнала: 2024, Номер 6(10)

Опубликована: Июль 1, 2024

Abstract Due to the built‐in electric field induced by spontaneous polarization in hybrid perovskite (HP) ferroelectrics, devices based on them exhibit excellent performance self‐powered photodetection. However, most of photodetector are made lead‐based HP ferroelectrics and have a relatively narrow photoresponse waveband. Although lead‐free HPs solve problem lead toxicity, their optoelectronic is inferior that waveband limited its optical band gap, which hinders further application. To this problem, herein, ferroelectric (HDA)BiI 5 (HDA hexane‐1,6‐diammonium) with large shows an enhanced photocurrent achieves x‐ray‐ultraviolet–visible‐near‐infrared (x‐ray‐UV–Vis–NIR) through ferro‐pyro‐phototronic (FPP) effect. The ferroelectric, pyroelectric, photovoltaic characteristics coupled together single‐phase effective way improve devices. What particularly attractive FPP effect not only improves , but also broadband photoresponses beyond absorption range. Especially, current boosting exceptional contrast ~1100% 2400% under 520 637 nm, respectively, associated Meanwhile, single crystal significant effects even high‐energy x‐ray, owns outstanding sensitivity 170.7 μC Gy −1 cm −2 lower detection limit 266 nGy s at 0 V bias. Therefore, it great significance study coupling multiple physical device ferroelectrics. image

Язык: Английский

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