Bandgap Narrowing of Lead-Free Perovskite-Type Hybrids for Visible-Light-Absorbing Ferroelectric Semiconductors

2017 ◽  
Vol 8 (9) ◽  
pp. 2012-2018 ◽  
Author(s):  
Chengmin Ji ◽  
Zhihua Sun ◽  
Aurang Zeb ◽  
Sijie Liu ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Lead Free ◽  
Bandgap Narrowing ◽  
Perovskite Type

Thermochromism to tune the optical bandgap of a lead-free perovskite-type hybrid semiconductor for efficiently enhancing photocurrent generation

2017 ◽  
Vol 5 (38) ◽  
pp. 9967-9971 ◽  
Author(s):  
Weichuan Zhang ◽  
Zhihua Sun ◽  
Jing Zhang ◽  
Shiguo Han ◽  
Chengmin Ji ◽  
...  
Keyword(s):  
Semiconductor Material ◽  
Optical Bandgap ◽  
Lead Free ◽  
Tunable Bandgap ◽  
Photocurrent Generation ◽  
Photoelectric Properties ◽  
Perovskite Type

Here we report a new lead-free hybrid semiconductor material, (C16H20N2)SbBr5, in which thermochromism results in a wide tunable bandgap and superior photoelectric properties.

Efficient Solar‐Driven Water Oxidation over Perovskite‐Type BaNbO 2 N Photoanodes Absorbing Visible Light up to 740 nm

2018 ◽  
Vol 8 (24) ◽  
pp. 1800094 ◽  
Author(s):  
Jeongsuk Seo ◽  
Takashi Hisatomi ◽  
Mamiko Nakabayashi ◽  
Naoya Shibata ◽  
Tsutomu Minegishi ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Perovskite Type

Preparation of CdS and Bi2S3 quantum dots co-decorated perovskite-type KNbO3 ternary heterostructure with improved visible light photocatalytic activity and stability for phenol degradation

2018 ◽  
Vol 47 (42) ◽  
pp. 15232-15245 ◽  
Author(s):  
Beata Bajorowicz ◽  
Ewa Kowalska ◽  
Joanna Nadolna ◽  
Zhishun Wei ◽  
Maya Endo ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Quantum Dot ◽  
Visible Light ◽  
Phenol Degradation ◽  
Hydrothermal Route ◽  
Visible Light Photocatalytic Activity ◽  
Perovskite Type ◽  
Visible Light Photocatalytic

A combination of the hydrothermal route with a linker assisted attachment method was used to obtain efficient CdS/Bi2S3 quantum dot-decorated perovskite type KNbO3.

scholarly journals Perovskite-type LaFeO3: Photoelectrochemical Properties and Photocatalytic Degradation of Organic Pollutants Under Visible Light Irradiation

Catalysts ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 342 ◽  
Author(s):  
Mohammed Ismael ◽  
Michael Wark
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Metal Ion ◽  
Electrochemical Impedance ◽  
Diffuse Reflectance Spectroscopy ◽  
Light Irradiation ◽  
Complexing Agent ◽  
X Ray ◽  
Perovskite Type

Perovskite-type oxides lanthanum ferrite (LaFeO3) photocatalysts were successfully prepared by a facile and cost-effective sol-gel method using La(NO)3 and Fe(NO)3 as metal ion precursors and citric acid as a complexing agent at different calcination temperatures. The properties of the resulting LaFeO3 samples were characterized by powder X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDXS), UV-Vis diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectra (IR), transmission electron microscopy (TEM), N2 adsorption/desorption and photoelectrochemical tests. The photoactivity of the LaFeO3 samples was tested by monitoring the photocatalytic degradation of Rhodamine B (RhB) and 4-chlorophenol (4-CP) under visible light irradiation, the highest photocatalytic activity was found for LaFeO3 calcined at 700 °C, which attributed to the relatively highest surface area (10.6 m2/g). In addition, it was found from trapping experiments that the reactive species for degradation were superoxide radical ions (O2−) and holes (h+). Photocurrent measurements and electrochemical impedance spectroscopy (EIS) proved the higher photo-induced charge carrier transfer and separation efficiency of the LaFeO3 sample calcined at 700 °C compared to that that calcined at 900 °C. Band positions of LaFeO3 were estimated using the Mott-Schottky plots, which showed that H2 evolution was not likely.

[C5H12N]CdCl3: an ABX3 perovskite-type semiconducting switchable dielectric phase transition material

2017 ◽  
Vol 4 (9) ◽  
pp. 1485-1492 ◽  
Author(s):  
Aurang Zeb ◽  
Zhihua Sun ◽  
Tariq Khan ◽  
Muhammad Adnan Asghar ◽  
Zhenyue Wu ◽  
...  
Keyword(s):  
Phase Transition ◽  
Thermal Stability ◽  
Dielectric Properties ◽  
High Thermal Stability ◽  
Lead Free ◽  
Dielectric Phase ◽  
Perovskite Type

We report a new lead-free ABX3 perovskite-type hybrid, which displays high thermal stability, semiconducting and striking switchable dielectric properties.

Low-dimensional bismuth(III) iodide hybrid material with high activity for the fast removal of rhodamine B

2018 ◽  
Vol 74 (12) ◽  
pp. 1744-1749 ◽  
Author(s):  
Wei-Jun Chen ◽  
Kai-Bin Chu ◽  
Jun-Ling Song
Keyword(s):  
Solvothermal Method ◽  
Waste Water Treatment ◽  
Lead Free ◽  
Tetrameric Structure ◽  
Distorted Octahedra ◽  
Perovskite Crystal ◽  
Low Dimensional ◽  
Perovskite Type ◽  
Degradation Ability ◽  
Fast Removal

Organic–inorganic hybrid lead-based perovskite crystal materials have been widely studied due to their excellent optical–electronic properties. However, the toxicity of lead limits their widespread use. Here, a lead-free perovskite-type compound, tetrakis(1,2,3-trimethylimidazolium) di-μ3-iodido-tetra-μ2-iodido-decaiodidotetrabismuth(III), (C6H11N2)4[Bi4I16], has been successfully synthesized by a simple solvothermal method. It exhibits a zero-dimensional (0D) tetrameric structure, including edge-sharing [Bi4I16]4− distorted octahedra. The band gap of 2.0 eV is close to that of (NH4)3[Bi2I9]. Degradation ability measurements were performed to examine the potential application of this material as an alternative for waste-water treatment.

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