Abstract 2D perovskites demonstrate higher moisture stability, oxygen content, thermal and a significantly lower ion migration/phase transition occurrence in comparison to 3D perovskite. These advantages imply huge potential for perovskite commercial applications the photovoltaic field. However, horizontal arrangement of organic layer severely hinders transport carriers, thus, power conversion efficiency solar cells (PSCs) is than that 3D. Controlling crystallization orientation achieve...

Abstract Zero‐dimensional (0D) structure‐based manganese metal halides (MHs) are believed to be the most promising candidates for next‐generation X‐ray scintillators due their intense radioluminescence and environmental friendliness. However, low‐temperature (<180 °C), large‐area integration with more efficient detection remains a tremendous challenge. Herein, from perspective of cation (ionic liquids) structure design, basic physical parameters 0D MHs regulated. And calculations...

Abstract Introducing hydroiodic acid (HI) as a hydrolysis‐derived precursor of the intermediate compounds has become an increasingly important issue for fabricating high quality and stable CsPbI 3 perovskite solar cells (PSCs). However, materials composition their effects on device performance remain unclear. Here, series high‐quality are prepared it is shown that they consist DMAI/DMAPbI x . Further characterization products show main component this system still Most dimethylammonium (DMA +...

Metal-free perovskites (MFPs) with flexible and degradable properties have been adopted in X-ray detection. For now, figuring out the key factors between structure device performance are critical to guide design of MFPs. Herein, MPAZE-NH4 I3 ⋅ H2 O was first designed synthesized improved structural stability performance. Through theoretical calculations, introducing methyl group benefits modulating tolerance factor, increases dipole moment strengthens hydrogen bonds. Meanwhile, bond...

Abstract Copper metal halides have emerged as a strong contender in the scintillator field due to self‐trapped excitons (STEs) mechanism. However, their development has been hindered by preparation process. Single crystals long growth cycles and cannot achieve large areas flexibility. Quantum dots low yield can easily cause chemical pollution, thickness of films prepared spin coating be controlled. To address these challenges, new method for preparing Cs 3 Cu 2 Cl 5 using sequential vacuum...

Abstract Two‐dimensional (2D) Ruddlesden–Popper (RP) CsPbI 3 perovskite possesses superior phase stability by introducing steric hindrance. However, due to the quantum and dielectric confinement effect, 2D structures usually exhibit large exciton binding energy, charge tunneling barrier across organic interlayer is difficult eliminate, resulting in poor transport performance. Here, a multiple‐ring aromatic ammonium, 1‐naphthylamine (1‐NA) spacer developed for RP solar cell (PSC). Theoretical...

Abstract 2D perovskite (PEA) 2 (Cs) n −1 Pb I 3 +1 (PEA: phenylethylammonium) exhibits more strengthened phase stability than its 3D components under ambient conditions and hence gained great attention in recent years. However, uncontrollable crystallization kinetics leads to difficulty controlling film morphology phase‐orientation regulation, resulting poor power conversion efficiency (PCE). Herein, by incorporating precursor additive N ‐methyl‐2‐pyrrolidone iodide (NMPI), the rate during...

Metal halides have been demonstrated to be promising candidates for X-ray detectors. However, its large leakage current caused by the severe ion migration and intrinsic defect substantially degrades device performance. In this work, an asymmetric BA2CsPb2I7-CsPbI3 planar heterojunction detector is designed suppress current. Both experimental theoretical calculations demonstrate that: 1) enlarged energy (0.80 eV) conductivity mutation at interface ensure stable baseline current; 2) CsPbI3...

The 329-type bismuth (Bi)-based metal halide (MH) polycrystalline films have potential to be applied in the new generation of X-ray imaging technology owing high absorption coefficients and excellent detection properties. However, mutually independent [Bi

The power conversion efficiency (PCE) of perovskite solar cells (PSCs) has exceeded 25%, showing great potential in the photovoltaic field. However, PSCs often show anomalous current density–voltage ( J–V ) hysteresis behavior forward and reverse scanning directions, which makes it impossible to accurately evaluate performance PSCs. Therefore, is necessary clearly understand mechanism suppress hysteresis. Herein, J – V strategies focused: first, various factors that affect are summarized....

The continuous advancement of the Internet Things (IoT) and photovoltaic technology has promoted development indoor photovoltaics (IPVs) that powers wireless devices. Nowadays, CsPbX3 perovskite received widespread attention because its high power conversion efficiency (PCE) in an environment suitable band gap for IPVs. In this work, we regulated thickness photoactive layer (to optimize carrier transport process without affecting absorption) bromine substitution adjust improve quality film)...

Metal halides exhibit exceptional optoelectronic properties, making them highly promising candidates for advanced X-ray detection applications. However, the majority of metal detectors contains lead, and toxicity...

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...

Exploiting novel materials featuring high‐quality zero‐dimensional structure, remarkable lattice stability, and minimal defects represents an efficacious strategy for enhancing the detection performance of X‐ray scintillators. Here, we design synthesize two novel, lead‐free, zirconium‐based organic‐inorganic hybrid metal halides (OIMHs), C14H40N4ZrCl8 C6H16N2ZrCl6. Based on steric hindrance effect organic cations, distance between [ZrCl6]2‐ polyhedra was designed electronic coupling...

Exploiting novel materials featuring high‐quality zero‐dimensional structure, remarkable lattice stability, and minimal defects represents an efficacious strategy for enhancing the detection performance of X‐ray scintillators. Here, we design synthesize two novel, lead‐free, zirconium‐based organic‐inorganic hybrid metal halides (OIMHs), C14H40N4ZrCl8 C6H16N2ZrCl6. Based on steric hindrance effect organic cations, distance between [ZrCl6]2‐ polyhedra was designed electronic coupling...

Abstract Nowadays, high performance (stability, spatial resolution, and optical yield) multi‐functional application (low‐cost, large‐area, flexible) are urgently needed for X‐ray detectors in national defense medical treatment et al. Herein, self‐organizing pixelated zero‐dimensional metal halide Cs 4 PbBr 6 based micro‐disks low‐cost (0.0238 $ cm −2 , 1/37 of CsI(Tl)), large‐area ultra‐flexible scintillator plates designed, prepared applied. The theoretical model describes that the...

Abstract Ion migration‐induced noise is the main limiting factor for metal halides (MHs) single crystals (SCs) X‐ray detectors, and heterostructure design most efficient method to overcome this puzzle. However, conventional stepwise solution or heteroepitaxial greatly limited by SCs secondary dissolution lattice parameters matching. Here, simple universal crystalline–amorphous heterojunction developed that proves be extremely effective in suppressing noise. MAPbBr 3 are first chosen as...

Abstract Manganese halides are one of the most potential candidates for large‐area flat‐panel detection owing to their biological safety and all‐solution preparation. However, reducing photon scattering enhancing efficient luminescence scintillator screens remains a challenge due uncontrollable crystallization serious nonradiative recombination. Herein, an organic cation modulation is reported control process enhance properties manganese halides. Given industrial requirements X‐ray detector,...

We successfully fabricated a pure phase 2D perovskite single crystal BA 2 PbBr 4 . applied it as wafer in the field of X-rays imaging and showed good performance impressive environmental temperature stability.

Abstract The emerging pseudohalide metal-free perovskite (pseudohalide–MFPs) X-ray detector caters to the demands of timely mobile diagnosis owing its lightweight, flexibility, and cost-effectiveness. However, performance these devices is severely limited by poor absorption, ultra-wide band gap, relative instability, their unknown biotoxicity. Herein, we construct heavy atom covalent bonds (C–Br/Cl) on A-site organic cation reinforce component coordination modulate absorption gap in...

Adv. Optical Mater . 2024 , 12 2302068 https://doi.org/10.1002/adom.202302068 The above article, published online on 23 November 2023 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the journal Editor‐in‐Chief, Anja Wecker, and Wiley‐VCH GmbH. authors reported that time‐resolved fs‐TA spectroscopy test results presented Figure 4a–c were not replicable further experiments determined discussions conclusions are reliable, so paper must be retracted....