scholarly journals Effect of Metal Work Function on Hydrogen Production from Photocatalytic Water Splitting with MTiO 2 Catalysts

2020 ◽  
Vol 5 (3) ◽  
pp. 1013-1019 ◽  
Author(s):  
Charles Beasley ◽  
Muthu Kumaran Gnanamani ◽  
Eduardo Santillan‐Jimenez ◽  
Michela Martinelli ◽  
Wilson D. Shafer ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Work Function ◽  
Water Splitting ◽  
Photocatalytic Water Splitting ◽  
Metal Work Function ◽  
Metal Work

Two-terminal vertical thyristor using Schottky contact emitter to improve thermal instability

Nano Futures ◽  
2021 ◽  
Author(s):  
Min-Won Kim ◽  
Ji-Hun Kim ◽  
Jun-Seong Park ◽  
Byoung-Seok Lee ◽  
Sangdong Yoo ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Work Function ◽  
Thermal Instability ◽  
Schottky Contact ◽  
Memory Cell ◽  
Cross Point ◽  
Operation Temperature ◽  
Metal Work Function ◽  
Metal Work ◽  
Contact Metal

Abstract In a two-terminal-electrode vertical thyristor, the latch-up and latch-down voltages are decreased when the memory operation temperature of the memory cells increases, resulting in a severe reliability issue (i.e., thermal instability). This study fundamentally solves the thermal instability of a vertical-thyristor by achieving a cross-point memory-cell array using a vertical-thyristor with a structure of vertical n++-emitter, p+-base, n+-base, and p++-emitter. The vertical-thyristor using a Schottky contact metal emitter instead of an n++-Si emitter significantly improves the thermal stability between 293 and 373 K. Particularly, the improvement degree of the thermal stability is increased significantly with the use of the Schottky contact metal work function. Because the thermal instability (i.e., degree of latch-up voltage decrement vs. memory operation temperature) decreases with an increase in the Schottky contact metal work function, the dependency of the forward current density between the Schottky contact metal and p+-Si based on the memory operation temperature reduces with increase in the Schottky contact metal work function. Consequently, a higher Schottky contact metal work function produces a higher degree of improvement in the thermal stability, i.e., W (4.50 eV), Ti (4.33 eV), Ta (4.25 eV), and Al (4.12 eV). Further research on the fabrication process of a Schottky contact metal emitter vertical-thyristor is essential for the fabrication of a 3-D cross-point memory-cell.

scholarly journals The elusive photocatalytic water splitting reaction using sunlight on suspended nanoparticles: is there a way forward?

2020 ◽  
Vol 10 (2) ◽  
pp. 304-310 ◽  
Author(s):  
Hicham Idriss
Keyword(s):  
Hydrogen Production ◽  
Water Splitting ◽  
Molecular Hydrogen ◽  
Photocatalytic Water Splitting ◽  
Suspended Nanoparticles

For many decades hydrogen production from water by photocatalytic methods has been pursued over a variety of semiconductor powder catalysts featuring many structures and compositions. The stoichiometric formation of molecular hydrogen and oxygen has stayed largely elusive.

scholarly journals Sunlight-driven photocatalytic hydrogen production from water using metal-doped strontium titanate perovskite

2020 ◽  
Author(s):  
Pushkal Sharma ◽  
Cheng-Ting Lee ◽  
Jeffrey Chi-Sheng Wu
Keyword(s):  
Hydrogen Production ◽  
Water Splitting ◽  
Strontium Titanate ◽  
Experimental Studies ◽  
Light Response ◽  
Theoretical Studies ◽  
Photocatalytic Water Splitting ◽  
Visible Light Response ◽  
Sacrificial Agent ◽  
Metal Doped

<div>The effects of various metal dopants on the photocatalytic water splitting activity of SrTiO<sub>3</sub> -based photocatalysts were investigated using experimental studies. The SrTiO<sub>3</sub>:Rh (1%) has been found to give the best efficiency in water splitting out of the various metal-doped samples studied. However, the same host doped with other metal dopants such as Fe, V, Ga, and Sb leads to negligible hydrogen evolution even when at least Fe has a better visible light response. Our results accompanied by previously conducted theoretical studies by our group explain the high photocatalytic water splitting activity of Rh doped SrTiO<sub>3 </sub>. Furthermore, the effects of the amount of catalyst, the proportion of sacrificial agent and pH were studied for the SrTiO<sub>3</sub>:Rh (1 mol%) along with studying its activity with seawater.</div>

scholarly journals Experimental study on direct solar photocatalytic water splitting for hydrogen production using surface uniform concentrators

2018 ◽  
Vol 43 (30) ◽  
pp. 13745-13753 ◽  
Author(s):  
Qingyu Wei ◽  
Yan Yang ◽  
Haijun Liu ◽  
Junyi Hou ◽  
Maochang Liu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Hydrogen Production ◽  
Water Splitting ◽  
Photocatalytic Water Splitting

Enhanced Tunneling Electro-Resistance Ratio for Ferroelectric Tunnel Junctions by Engineering Metal Work Function

2021 ◽  
pp. 1-1
Author(s):  
Yi-Fan Chen ◽  
Lee-Wen Hsu ◽  
Chia-Wei Hu ◽  
Guan-Ting Lai ◽  
Yung-Hsien Wu
Keyword(s):  
Work Function ◽  
Tunnel Junctions ◽  
Resistance Ratio ◽  
Metal Work Function ◽  
Metal Work
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