Single- or double A-site cations in A3Bi2I9 bismuth perovskites: What is the suitable choice?
نویسندگان
چکیده
Abstract Investigations on the effect of single or double A-site cation engineering photovoltaic performance bismuth perovskite-inspired materials (A 3 Bi 2 I 9 ) are rare. Herein, we report novel single- and double-cation based developed by (1) completely replacing CH NH + (methylammonium, MA in with various organic cations such as CH(NH (formamidinium, FA ), (CH (dimethylammonium, DMA C(NH (guanidinium, GA inorganic cesium (Cs rubidium (Rb potassium (K sodium (Na lithium (Li (2) partially Cs different stoichiometric ratios. Compared to single-cation perovskite devices, device showed an increment power conversion efficiency (PCE) up 1.5% crediting reduction bandgap. This is first study demonstrating showing bandgap opens possibilities towards compositional for improved performance. Graphic
منابع مشابه
Structure for perovskites with layered ordering of A-site cations.
The structure of La(1/3)NbO3 is that of a perovskite with La3+ cations ordered into alternate layers of perovskite A-sites. This is the description of a tetragonal structure and yet the room-temperature structure shows an orthorhombic distortion. The structure of La(2/3)TiO3 shows similar features. It has been recognized only very recently that the orthorhombic distortion in both these compound...
متن کاملHigh-pressure synthesis, crystal chemistry and physics of perovskites with small cations at the A site.
ABO3 perovskites with small cations at the A site (A = Sc(3+), In(3+) and Mn(2+) and B = Al(3+) and transition metals) are reviewed. They extend the corresponding families of perovskites with A(3+) = Y, La-Lu, and Bi and A(2+) = Cd, Ca, Sr and Ba and exhibit the largest structural distortions. As a result of these large distortions, they show, in many cases, distinct structural and magnetic pro...
متن کاملIntermetallic charge transfer between A-site Cu and B-site Fe in A-site-ordered double perovskites
In this review article, we describe in detail the temperature-induced intermetallic charge transfer between A-site Cu and B-site Fe ions in the A-site-ordered double perovskites RCu3Fe4O12 (R = La, Bi). In these compounds, a very rare Cu valence state at the square-planar-coordinated A sites was stabilized by high-pressure synthesis. By increasing the temperature, a Cu–Fe intermetallic charge t...
متن کاملStructure and cation distribution in perovskites with small cations at the A site: the case of ScCoO3
We synthesize ScCoO3 perovskite and its solid solutions, ScCo1-x Fe x O3 and ScCo1-x Cr x O3, under high pressure (6 GPa) and high temperature (1570 K) conditions. We find noticeable shifts from the stoichiometric compositions, expressed as (Sc1-xMx )MO3 with x = 0.05-0.11 and M = Co, (Co, Fe) and (Co, Cr). The crystal structure of (Sc0.95Co0.05)CoO3 is refined using synchrotron x-ray powder di...
متن کاملSingle Crystal Growth of Multiferroic Double Perovskites: Yb2CoMnO6 and Lu2CoMnO6
We report on the growth of multiferroic Yb2CoMnO6 and Lu2CoMnO6 single crystals which were synthesized by the flux method with Bi2O3. Yb2CoMnO6 and Lu2CoMnO6 crystallize in a double-perovskite structure with a monoclinic P21/n space group. Bulk magnetization measurements of both specimens revealed strong magnetic anisotropy and metamagnetic transitions. We observed a dielectric anomaly perpendi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Materials Research
سال: 2021
ISSN: ['0884-1616', '1092-8928', '0884-2914', '1091-8876', '2044-5326']
DOI: https://doi.org/10.1557/s43578-021-00155-z