Quasi‐single‐crystal Tin Halide Perovskite Films with High Structural Integrity for Near‐infrared Imaging Array enabling Hidden Object Recognition DOI
Tianhua Liu, Lixia Wang,

Ziquan Yuan

и другие.

Angewandte Chemie, Год журнала: 2024, Номер unknown

Опубликована: Окт. 29, 2024

Abstract Near‐infrared (NIR) image sensors based on solution‐processed thin film are gaining prominence in various applications, including security detection, remote sensing, medical imaging, and environmental monitoring, owing to superior penetration capabilities of NIR light. However, the reported perovskite suffer from limited resolution performance due poor structural integrity, bioincompatibility, constrained response wavelength range lead‐based materials employed. In this study, we present non‐toxic quasi‐single‐crystal (QSC) CH(NH 2 ) SnI 3 (FASnI films, prepared via a simple spin‐coating technique, that demonstrate high integrity effective response. Through series situ characterizations, reveal orderly growth mode QSC‐FASnI films enables more oriented crystal with reduced trap grain boundaries. Consequently, self‐powered photodetector exhibited large detectivity over 10 13 Jones (780–890 nm). Ultimately, high‐resolution 64×64 (4096) pixels imaging array, exhibiting photo dark non‐uniformity value, was fabricated thin‐film transistors (TFT) backplanes, enabling ultraweak light (63 nW cm −2 real‐time fingerprint hidden object recognition. This work pioneers application lead‐free for arrays.

Язык: Английский

A high-performance self-powered CsPbBr3 perovskite photodetector enabled by self-assembled monolayer interface engineering DOI
Yu Liu, Li Chen, Shaohong Li

и другие.

Journal of Materials Chemistry C, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

We developed a self-powered photodetector using SAM interlayer for defect passivation and electron blocking. The device shows low dark current, an on/off ratio of 7.6 × 10⁶, detectivity 2.74 10¹² Jones under 365 nm light.

Язык: Английский

Процитировано

0

Design and optimization of high responsivity and detectivity of lead-free tin-based perovskite photodetectors by numerical simulation DOI
Weiwei Xie, ChaoLing Du, Yi Luo

и другие.

Journal of Physics and Chemistry of Solids, Год журнала: 2025, Номер unknown, С. 112919 - 112919

Опубликована: Июнь 1, 2025

Язык: Английский

Процитировано

0

Bias‐Induced Gradient Bandgap of Bulk Perovskite Boosting Built‐In Electric Fields for High‐Performance Self‐Powered Photodetectors DOI
Yuchen Miao, Sheng Li, Jun Wu

и другие.

Laser & Photonics Review, Год журнала: 2024, Номер unknown

Опубликована: Окт. 26, 2024

Abstract Self‐powered photodetectors (PDs) have gained significant attention in recent years due to their ability operate without external power. Strengthening the built‐in electric field ( E bi ) of these devices is crucial for efficient carrier separation and transport. However, disordered energy level arrangement within mixed halide perovskites (MHP) often conflicts with levels constructed by interface, weakening thus affecting performance self‐powered PDs. In this study, a bias‐induced gradient bandgap bulk MHP proposed high‐performance photodetectors. The vector superposition interface significantly boosts device, providing powerful driving force transport photogenerated carriers. obtained device exhibits exceptional performance, including an ultra‐fast response time 1.14/1.75 µs, large specific detectivity 7.27 × 10 12 cm Hz 1/2 W −1 , ultra‐high responsivity 0.49 A quantum efficiency 93.5% at 0 V bias. Furthermore, strategy also demonstrated lateral structure photodetector. This work offers valuable guidance achieving MHP‐based PDs through optimization.

Язык: Английский

Процитировано

2

High‐Performance All‐Inorganic Perovskite Tandem Photodetectors With Bi2TeO6 Layer Enabled by Enhanced Dual Pyro‐Phototronic Effect for Triple‐Encryption Imaging Sensing System with Programmable Logic Gate DOI Open Access
Yüe Zhao, Shujie Jiao, Song Yang

и другие.

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 8, 2024

Abstract As the focus on information security continues to intensify, encrypted imaging sensing technology becomes increasingly indispensable. However, widespread application of is hindered by high manufacturing costs and complex system construction. Herein, an all‐inorganic perovskite/perovskite tandem self‐powered photodetector (PDs) reported, incorporated with Bi 2 TeO 6 layer enahnce dual pyro‐phototronic effect, realize innovated encryption programmable logic gate. The PDs reach responsivity 1.46 A W −1 detectivity 3.44 × 10 13 Jones, corresponding EQE reaches 342%, which ≈75.48 times greater than that without effect. outstanding performance resulting from effect in Cs PbI Cl perovskite /CsSn 0.5 Pb IBr interface, optimizing band arrangement oxidized layer. photovoltaic signal can still be clearly distinguished under 8 kHz pulsed laser. More importantly, achieves simultaneous outputs triple image information, their optoelectronic gate execute six distinct logical functions, including “OR”, “AND”, “XOR”, “NAND”, “NOR” “XNOR”. This research not only provides a feasible strategy for realizing materials, but also presents novel insights designing technology.

Язык: Английский

Процитировано

2

High‐Performance Single‐Microplate Perovskite Photodetectors Based on Polyvinyl Alcohol Filled Planar Electrodes for Weak‐Light Imaging and Pixel Integration DOI
Luyao Mei,

Wenzhi Yu,

Nan Cui

и другие.

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 17, 2024

Abstract Photoconductors featuring an individual micro/nano‐crystal as the photoactive channel hold great promise for next‐generation integrated optoelectronics. Meanwhile, gain aiming signal amplification without extra amplifier, fast response data transfer, and low dark current weak acquisition are highly desirable in optoelectronics, but inherent trade‐off traditional photoconductors. Herein, study demonstrates a single‐microplate MAPbI 3 photoconductor based on polyvinyl alcohol‐filled planar electrodes that can simultaneously achieve excellent performance these parameters. The superior be attributed to exquisite design of filling device gap with alcohol. This deep‐work‐function transparent alcohol not only passivate surface defects perovskite microplate by hydrogen bonding, also form heterojunction top perovskites induce depleted channel. Resultant photodetectors exhibit exceptional characteristics including ultra‐low noise‐equivalent power 0.19 fW Hz −1/2 , high specific detectivity 3.68 × 10 14 Jones, 3.2 µs, EQE‐bandwidth over 7 Hz, well stability. More importantly, photoconductors demonstrate ultra‐weak‐light imaging ability surpassing silicon counterparts. Furthermore, successful integration their pixels showcases promising prospect

Язык: Английский

Процитировано

1

Suppressed nonradiative electron–hole recombination in bismuth halide perovskite Cs3Bi2Cl9: Time domain ab initio analysis DOI

Junjie Zhou,

Yinglin Guan,

Minru Wen

и другие.

Applied Physics Letters, Год журнала: 2024, Номер 125(14)

Опубликована: Сен. 30, 2024

Time-domain density functional theory, coupled with non-adiabatic molecular dynamics simulations, was employed to explore the defect characteristics and associated nonradiative recombination processes in bismuth halide perovskite Cs3Bi2Cl9. Our findings indicate that Cs3Bi2Cl9 inherently exhibits p-type semiconductor behavior, vacancies at Cs Bi sites acting as predominant shallow acceptor defects. Although Cl vacancy interstitial defects introduce trap states within bandgap of Cs3Bi2Cl9, by-defect electron–hole (e-h) is substantially impeded, which attributed remarkable local structural deformations BiCl63− octahedral compression around defects, further results decoupling between state band edge state. As a result, enhanced delocalization leads notably small wave function overlap states, well weak nonadiabatic couplings dominated by low-frequency phonons. study offers crucial insights into mechanism defect-mediated e-h bismuth-based perovskites provides guidelines for designing efficient optoelectronic devices based on these materials.

Язык: Английский

Процитировано

1

Quasi‐single‐crystal Tin Halide Perovskite Films with High Structural Integrity for Near‐infrared Imaging Array enabling Hidden Object Recognition DOI
Tianhua Liu, Lixia Wang,

Ziquan Yuan

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Окт. 29, 2024

Abstract Near‐infrared (NIR) image sensors based on solution‐processed thin film are gaining prominence in various applications, including security detection, remote sensing, medical imaging, and environmental monitoring, owing to superior penetration capabilities of NIR light. However, the reported perovskite suffer from limited resolution performance due poor structural integrity, bioincompatibility, constrained response wavelength range lead‐based materials employed. In this study, we present non‐toxic quasi‐single‐crystal (QSC) CH(NH 2 ) SnI 3 (FASnI films, prepared via a simple spin‐coating technique, that demonstrate high integrity effective response. Through series situ characterizations, reveal orderly growth mode QSC‐FASnI films enables more oriented crystal with reduced trap grain boundaries. Consequently, self‐powered photodetector exhibited large detectivity over 10 13 Jones (780–890 nm). Ultimately, high‐resolution 64×64 (4096) pixels imaging array, exhibiting photo dark non‐uniformity value, was fabricated thin‐film transistors (TFT) backplanes, enabling ultraweak light (63 nW cm −2 real‐time fingerprint hidden object recognition. This work pioneers application lead‐free for arrays.

Язык: Английский

Процитировано

1

Phosphonium Cation-Based Ferroelectric 1D Halide Perovskite-Like Semiconductor for Mechanical Energy Harvesting DOI

Prabhanjan Pradhan,

Prabhat Kumar,

Ravi Kumar Bandaru

и другие.

Chemistry of Materials, Год журнала: 2024, Номер 36(22), С. 11015 - 11024

Опубликована: Ноя. 9, 2024

Organic–inorganic halide perovskites (OIHPs) have attracted tremendous attention from researchers because of their diverse applications in optoelectronics, sensing, catalysis, memory, photodetectors, and medical diagnostics. The presence inherent ferroelectricity these perovskite materials facilitates the separation photogenerated electron–hole pairs. Here, we report a large phosphonium cation-based methyl triphenyl lead bromide (MTPLB) perovskite-like semiconductor with direct band gap 3.49 eV, which shows both nanoscale bulk at room temperature. material exhibits phase transition temperature 477 K, polarization saturation 0.26 μC/cm2, d33 5.2 pC/N. MTPLB displays robust piezoelectric response, as confirmed via advanced piezoresponse force microscopy (PFM). Further, fabricated nanogenerator devices varying ratios poly(vinylidene fluoride) (PVDF) composites for mechanical biomechanical energy harvesting. We an enhanced all best response device 2% loading PVDF matrix due to triggering electroactive phases PVDF. improved output operational durability, flexibility composite-based underscore potential technological electronics, actuators, sensors, energy-harvesting processes.

Язык: Английский

Процитировано

1

Unraveling the Role of Electron‐Withdrawing Molecules for Highly Efficient and Stable Perovskite Photovoltaic DOI Creative Commons
Xiaoqing Jiang,

Kaiwen Dong,

P. Li

и другие.

Angewandte Chemie, Год журнала: 2024, Номер unknown

Опубликована: Сен. 7, 2024

Abstract Electron‐withdrawing molecules (EWMs) have exhibited remarkable efficacy in boosting the performance of perovskite solar cells (PSCs). However, underneath mechanisms governing their positive attributes remain inadequately understood. Herein, we conducted a comprehensive study on EWMs by comparing 2,2′‐(2,5‐cyclohexadiene‐1,4‐diylidene) bismalononitrile (TCNQ) and (2,3,5,6‐tetrafluoro‐2,5‐cyclohexadiene‐1,4‐diylidene) dimalononitrile (F4TCNQ) employed at perovskite/hole transport layer (HTL) interfaces. Our findings reveal that simultaneously enhance chemical passivation, interface dipole effect, chemically binding to HTL. Notably, F4TCNQ, with its superior electron‐withdrawing properties, demonstrates more pronounced impact. Consequently, PCSs modified F4TCNQ achieved an impressive power conversion efficiency (PCE) 25.21 %, while demonstrating excellent long‐term stability. Moreover, PCE larger‐area module (14.0 cm 2 ) based reached 21.41 %. This work illuminates multifaceted interfaces PSCs, delivering pivotal insights pave way for sophisticated design strategic application EWMs, thereby propelling advancement photovoltaic technology.

Язык: Английский

Процитировано

0

Advancing Perspectives on Large-Area Perovskite Luminescent Films DOI
Lei Zhang, Hui Kang, Xinyi Lin

и другие.

Energy & Fuels, Год журнала: 2024, Номер 38(18), С. 17343 - 17354

Опубликована: Сен. 9, 2024

Язык: Английский

Процитировано

0