Weak X‐Ray to Visible Lights Detection Enabled by a 2D Multilayered Lead Iodide Perovskite with Iodine‐Substituted Spacer

Advanced Science, Год журнала: 2023, Номер 10(21)

Опубликована: Май 10, 2023

Broadband photodetectors (PDs) with low detection limits hold significant importance to next-generation optoelectronic devices. However, simultaneously detecting broadband (i.e., X-ray visible regimes) and weak lights in a single semiconducting material remains highly challenging. Here, by alloying iodine-substituted short-chain cations into the 3D FAPbI

Язык: Английский

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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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Recent Progress of 2D Materials‐Based Photodetectors from UV to THz Waves: Principles, Materials, and Applications

Small, Год журнала: 2024, Номер unknown

Опубликована: Сен. 5, 2024

Abstract Photodetectors are one of the most critical components for future optoelectronic systems and it undergoes significant advancements to meet growing demands diverse applications spanning spectrum from ultraviolet (UV) terahertz (THz). 2D materials very attractive photodetector because their distinct optical electrical properties. The atomic‐thin structure, high carrier mobility, low van der Waals (vdWs) interaction between layers, relatively narrower bandgap engineered through engineering, absorption coefficient significantly benefit chip‐scale production integration materials‐based photodetectors. extremely sensitive detection at ambient temperature with ultra‐fast capabilities is made possible adaptability materials. Here, recent progress photodetectors based on materials, covering UV THz reported. In this report, light first deliberated in terms physics. Then, various mechanisms which detectors work, important performance parameters, fruitful fabrication methods, fundamental properties types detectors, different strategies improve performance, discussed.

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

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Авг. 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.

Язык: Английский

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Modulating Quantum Well Width of Ferroelectric Ruddlesden–Popper Perovskites for Flexible Light Communication Device

Advanced Functional Materials, Год журнала: 2023, Номер 34(29)

Опубликована: Дек. 15, 2023

Abstract 2D Ruddlesden–Popper perovskites exhibit significant ferroelectricity due to the spontaneous polarization of organic molecules. By modulating quantum well width in BA 2 MA n‐1 Pb n Br 3n+1 , a series are adopted realize adjustable intensity and bandgap width. It is found that when = 3, perovskite has maximum strength optimal optoelectronic performance. In addition, flexible photodetectors with high mechanical stability successfully fabricated based on 3 microplates. The responsivity 920 mA W −1 detectivity 1.02 × 10 11 Jones, along excellent flexibility stability. After 3000 bending cycles, photocurrent photodetector remains 81.8% initial state. Besides, increase by 33 34 times after at 0 V, respectively. And sensitivity current ratio 2.09. On basis controllable regulation through polarization, application decoding devices utilizing correspondence between optical signals before binaries achieved. These findings highlight potential as promising strategy for designing next‐generation 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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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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Large in-plane anisotropic 2D perovskites toward highly linear polarized light responses

Inorganic Chemistry Frontiers, Год журнала: 2023, Номер 10(17), С. 5035 - 5043

Опубликована: Янв. 1, 2023

A unique cationic assembly via strong H-bonding interacts intensely with perovskite inorganic sheets to bring about huge in-plane structural anisotropy that leads high photocurrent responses.

Язык: Английский

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