CsPbBr3, an inorganic halide perovskite, has
attracted
great interest in recent years due to its excellent photoelectric
properties. In this paper, we report a high-performance position-sensitive
detector and laser communication sensor based on a CsPbBr3/4H-SiC heterojunction that effectively exploits the lateral photovoltaic
(LPV) effect. The X-ray diffraction, X-ray photoelectron spectra,
and photoluminescence data indicate that a high-quality CsPbBr3 film has been successfully obtained using pulsed laser deposition.
The thickness of the CsPbBr3 film is shown to play a key
role in the open-circuit voltage and linear LPV. A large position
sensitivity (up to 827 mV/mm) of the LPV with a fast relaxation time
is observed. Moreover, the shortest relaxation time of only 0.34 μs
for 532 nm laser irradiation among counterparts is achieved in the
detector under consideration. Furthermore, the position sensitivity
and relaxation time of the LPV in the CsPbBr3/4H-SiC heterojunction
show a weak dependence on the laser wavelength from 266 to 532 nm.
The robust characteristics of fast relaxation time and high position
sensitivity of the LPV make the CsPbBr3 junction a promising
candidate for both laser communication sensors and self-powered high-performance
position-sensitive detectors.
Solar-blind photodetectors based on wide bandgap semiconductors have attracted great interest recently. Perovskite rare-earth nickelates like RNiO3 are stable p-type semiconductors with adjustable physical properties. This paper reports a high-performance solar-blind photodetector made of PrxSm1−xNiO3/Nb:SrTiO3 heterojunctions utilizing a lateral photovoltaic effect. A high position sensitivity of up to 879.4 mV/mm and a fast relaxation time of 0.6 μs were observed with 266 nm laser irradiation under 3 Suns. The transverse diffusion model of photogenerated carriers can explain the lateral photovoltaic effect well. Furthermore, an optical communication system transmission was developed from the junction. The fast relaxation time and high position sensitivity make the rare-earth nickelates a promising candidate for a self-powered high-performance solar-blind detector.
Water electrolysis offers a zero-carbon route to generate renewable energy conversion systems. Herein, a self-supported nickel phosphosulfide nanosheet (NS) electrocatalyst was fabricated at a low temperature on carbon cloth, which was then subjected to Ar etching to enhance its catalytic activity. Etching resulted in better hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) performance than other samples, with overpotentials of 103.1 mV (at 10 mA cm−2) and 278.9 mV (at 50 mA cm−2), respectively. The characterization results confirmed that Ar etching created a thin amorphous layer around the NiPS3 NSs, which increased the number of active sites and modulated their electronic structures. These 3D-structured NiPS3 NSs and their subsequent Ar etching process show promise for applications in overall water splitting in alkaline media.
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