AI Article Synopsis

  • The study investigates CsAgBiBr, a double perovskite crystal, as a potential material for radiation detection due to its desirable properties.
  • CsAgBiBr crystals were successfully grown using a solution growth technique, exhibiting high resistivity greater than 10 Ω cm, which minimizes leakage current for semiconductor detectors.
  • Analysis indicated that CsAgBiBr is a p-type semiconductor with the Fermi level at 0.788 eV above the valence band and revealed two near band gap energies at 1.917 eV and 2.054 eV through low-temperature cathodoluminescence measurements.

Similar Publications

A high-temperature double perovskite molecule-based antiferroelectric with excellent anti-breakdown capacity for energy storage.

Nat Commun

April 2023

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, People's Republic of China.

Halide double perovskites have recently emerged as an environmentally green candidate toward electronic and optoelectronic applications owing to their non-toxicity and versatile physical merits, whereas study on high-temperature antiferroelectric (AFE) with excellent anti-breakdown property remains a huge blank in this booming family. Herein, we present the first high-temperature AFE of the lead-free halide double perovskites, (CHMA)CsAgBiBr (1, where CHMA is cyclohexylmethylammonium), by incorporating a flexible organic spacer cation. The typical double P-E hysteresis loops and J-E curves reveal its concrete high-temperature AFE behaviors, giving large polarizations of ~4.

View Article and Find Full Text PDF

The bulk anomalous photovoltaic (BAPV) effect of acentric materials refers to a distinct concept from traditional semiconductor-based devices, of which the above-bandgap photovoltage hints at a promise for solar-energy conversion. However, it is still a challenge to exploit new BAPV-active systems due to the lacking of knowledge on the structural origin of this concept. BAPV effects in single crystals of a 2D lead-free double perovskite, (BBA) CsAgBiBr (1, BBA = 4-bromobenzylammonium), tailored by mixing aromatic and alkali cations in the confined architecture to form electric polarization are acquired here.

View Article and Find Full Text PDF

We report the self-assembly of 2D double perovskite (BLA) CsAgBiBr (BLA=benzylammonium) on 3D Cs AgBiBr crystals, providing the first demonstration of polarization-sensitive photodetection using lead-free double perovskite heterocrystals (HCs). The (BLA) CsAgBiBr /Cs AgBiBr HC successfully combines the anisotropy of 2D double perovskites with the well-defined interface provided by heterogeneous integration. Driven by the built-in electric field in junction, photodetectors of HCs exhibit unique polarization dependence of zero-bias photocurrent with a large anisotropy ratio up to 9, which is 6 times amplified as compared to the pristine 2D (BLA) CsAgBiBr .

View Article and Find Full Text PDF

Lead-free perovskites are attracting increasing interest as nontoxic materials for advanced optoelectronic applications. Here, we report on a family of silver/bismuth bromide double perovskites with lower dimensionality obtained by incorporating phenethylammonium (PEA) as an organic spacer, leading to the realization of two-dimensional double perovskites in the form of (PEA)AgBiBr ( = 1) and the first reported (PEA)CsAgBiBr ( = 2). In contrast to the situation prevailing in lead halide perovskites, we find a rather weak influence of electronic and dielectric confinement on the photophysics of the lead-free double perovskites, with both the 3D CsAgBiBr and the 2D = 1 and = 2 materials being dominated by strong excitonic effects.

View Article and Find Full Text PDF

Due to the breakthrough development of layered hybrid perovskites, the multilayered hybrid double perovskites have emerged as outstanding semiconducting materials owing to their environmental friendliness and superior stability. Despite recent booming advances, the realization of above-room temperature ferroelectricity in this fascinating family remains a huge challenge. Herein, when the molecular design strategy of aromatic cation alloying is applied, an above-room temperature "green" bilayered hybrid double perovskite photoferroelectric, (CHCHNH)CsAgBiBr (), is successfully developed with a notable saturation polarization of 10.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!