Chemical Science, Год журнала: 2025, Номер unknown
Опубликована: Янв. 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.
Язык: Английский
Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown
Опубликована: Янв. 17, 2024
Abstract Metal halide perovskites (MHPs) are considered ideal photovoltaic materials due to their variable crystal material composition and excellent photoelectric properties. However, this variability in leads complex crystallization processes the manufacturing of perovskite (MHP) thin films, resulting reduced crystallinity subsequent performance loss final device. Thus, understanding controlling dynamics essential for improving stability PSCs (Perovskite Solar Cells). To investigate impact characteristics on properties MHP films identify corresponding modulation strategies, we primarily discuss relevant aspects kinetics, systematically summarize theoretical methods, outline techniques crystallization, including solution engineering, additive component which helps highlight prospects current challenges kinetics
Язык: Английский
Процитировано
31
Nano-Micro Letters, Год журнала: 2024, Номер 16(1)
Опубликована: Апрель 26, 2024
Metal-halide perovskites are revolutionizing the world of X-ray detectors, due to development sensitive, fast, and cost-effective devices. Self-powered operation, ensuring portability low power consumption, has also been recently demonstrated in both bulk materials thin films. However, signal stability repeatability under continuous exposure only tested up a few hours, often reporting degradation detection performance. Here it is shown that self-powered direct fabricated starting from FAPbBr
Язык: Английский
Процитировано
27
Advanced Materials, Год журнала: 2024, Номер 36(31)
Опубликована: Май 3, 2024
Functional agents are verified to efficiently enhance device performance of perovskite solar cells (PSCs) through surface engineering. However, the influence intrinsic characteristics molecules on final is overlooked. Here, a reconstruction strategy developed efficiency inverted PSCs by mitigating adverse effects lead chelation (LC) molecules. Bathocuproine (BCP) chosen as representative LC for its easy accessibility and outstanding optoelectronic properties. During this strategy, BCP first dissolved in solvents then captured specially undercoordinated Pb
Язык: Английский
Процитировано
21
Aggregate, Год журнала: 2024, Номер 5(5)
Опубликована: Апрель 12, 2024
Abstract The exceptional optoelectronic properties of lead halide perovskite nanocrystals (PeNCs) in the ultraviolet and visible spectral regions have positioned them as a promising class semiconductor materials for diverse photovoltaic applications. However, their limited response to near‐infrared (NIR) light due intrinsic bandgap (>1.5 eV) has hindered applications many advanced technologies. To circumvent this limitation, it is fundamental significance integrate PeNCs with lanthanide‐doped upconversion nanoparticles (UCNPs) that are capable efficiently converting low‐energy NIR photons into high‐energy photons. By leveraging energy transfer from UCNPs PeNCs, synergistic combination can not only expand responsivity range but also introduce novel emission profiles luminescence multi‐dimensional tunability (e.g., wavelength, lifetime, polarization) under low‐to‐medium power irradiation, which breaks through inherent restrictions individual thereby opens up new opportunities device engineering. In review, we focus on latest advancements development PeNCs‐UCNPs nanocomposites, an emphasis controlled synthesis optical design such full‐spectrum solar cells, photodetectors, multilevel anticounterfeiting. Some future efforts prospects toward active research field envisioned.
Язык: Английский
Процитировано
15
ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(5), С. 6189 - 6197
Опубликована: Янв. 24, 2024
Formamidinium lead triiodide (FAPbI3) perovskite quantum dot has outstanding durability, reasonable carrier lifetime, and long diffusion length for a new generation of highly efficient solar cells. However, ligand engineering is dilemma because the ionized dynamic characteristics dots. To circumvent this issue, herein, we employed mild solution-phase ligand-exchange approach through adding short-chain amino acids that contain carboxyl groups to modify dots passivate their surface defects during purification process. As result, photoelectric conversion efficiency FAPbI3 cells (PQDSCs) increased from 11.23 12.97% with an open-circuit voltage 1.09 V, short-circuit current density 16.37 mA cm–2, filling factor 72.13%. Furthermore, stability device modified by retains over 80% initial upon being exposed 20–30% relative humidity 240 h aging treatment. This work may offer innovative concept treatment improve photovoltaic performance PQDSCs toward large-scale manufacture.
Язык: Английский
Процитировано
13
Advanced Functional Materials, Год журнала: 2024, Номер unknown
Опубликована: Март 29, 2024
Abstract Vacuum‐evaporated metal halides (MHs) scintillator thick films have received much attention in the X‐ray imaging field due to their excellent light yield and uniform large‐area preparation. However, inevitable heteromorphic homologs MHs (e.g., Copper‐based (Cu‐MHs): CsCu 2 X 3 ∖Cs Cu 5 ) change of film structural backbone will result spectral hybridization (phase purity), eventually detaches (lattice mismatches). Herein, a single‐source vacuum evaporation method prepare (≈10 µm) Cu‐MHs (as an example) scintillators is realized: 1) Presynthesis pure phase materials by solution with protective agent ensure purity without precise control component ratios process; 2) One‐shot formation avoids stress accumulation utilize longitudinal growth characteristics crystalline obtain crystal orientations better optical outputs. Finally, obtained comparable partially single‐crystal (53 983 photons MeV −1 resolution (14.1 lp mm partial template method. The detection system based on prepared exhibits good response speed linearity different radiation intensities exposure times. further drive application believed.
Язык: Английский
Процитировано
10
Sensors, Год журнала: 2024, Номер 24(3), С. 725 - 725
Опубликована: Янв. 23, 2024
CdZnTe (CZT) is a new type of compound semiconductor that has emerged in recent years. Compared to other materials, it possesses an ideal bandgap, high density, and electron mobility, rendering excellent room-temperature composite material for X-ray γ-ray detectors. Due the exceptional performance CZT material, detectors manufactured using exhibit energy resolution, spatial detection efficiency. They also have advantage operating at room temperature. array detectors, furthermore, demonstrate outstanding three-dimensional imaging capabilities. Researchers worldwide conducted extensive studies on this subject. This paper, building upon foundation, provides comprehensive analysis crystals summarizes existing research offer valuable insights envisioning detector methodologies.
Язык: Английский
Процитировано
9
Small, Год журнала: 2025, Номер unknown
Опубликована: Янв. 16, 2025
In this study, we investigate how modulating organic spacers in perovskites influences their X-ray detection performance and reveal the mechanism of low-dose with high sensitivity using femtosecond-transient absorption spectroscopy (fs-TAS). Particularly, employ N,N,N',N'-tetramethyl-1,4-phenylenediammonium (TMPDA) N,N-dimethylphenylene-p-diammonium (DPDA) as to synthesize 2D perovskite single crystals (SCs). We find that DPDA-based SCs exhibit reduced interplanar spacing between inorganic layers, leading increased lattice packing. Density functional theory (DFT) results indicate effective mass lower distortion (DPDA)PbBr4 suppressing formation self-trapped exciton (STEs) electron-phonon coupling enhancing carrier delocalization these SCs. Further, measurements demonstrates higher than (TMPDA)PbBr4, attributed its enhanced delocalization, mobility-lifetime product. The limit (LoD) for is determined be 13 nGy/s, significantly both commercial detectors state-of-the-art perovskite-based detectors. Furthermore, fs-TAS study reveals prolonged hot STE cooling decay lifetimes, which directly correlate sensitivity. This highlights impact on performance, providing a framework designing ultra-low LoD essential health security applications.
Язык: Английский
Процитировано
1
Nano-Micro Letters, Год журнала: 2025, Номер 17(1)
Опубликована: Фев. 6, 2025
Abstract Two-dimensional Dion-Jacobson (DJ) perovskite has garnered significant attention due to its superior responsivity and operation stability. However, efforts are predominantly focused on discovering new organic spacer synthesize novel perovskites, while material-form-associated light management, which is crucial for enhancing the photodetector’s efficiency, largely overlooked. Herein, we introduced surface management strategy into DJ-type system by synthesizing surface-patterned BDAPbBr 4 (BPB, BDA = NH 3 (CH 2 ) microplates (MPs) using template-assisted space-confined method, was further elucidated theoretical optical simulation. By leveraging MPs enhance absorption, BPB-based photodetectors (PDs) achieved remarkable photoresponse in ultraviolet region, marked a high on/off ratio (~ 5000), (2.24 A W −1 ), along with large detectivity 10 13 Jones) low detection limit (68.7 nW cm −2 ). Additionally, PDs showcased communication imaging capabilities even under weak-light illumination. Notably, anisotropic nature of conferred excellent polarization sensitivity PD. These results represented first demonstration BPB imaging, as well polarized detection. Our findings offer valuable insights photodetector performance optoelectronic applications through strategies.
Язык: Английский
Процитировано
1
Chemical Physics Letters, Год журнала: 2025, Номер unknown, С. 142032 - 142032
Опубликована: Март 1, 2025
Язык: Английский
Процитировано
1