scholarly journals GS2.4 - UV light enhanced room temperature NO2 gas sensors based on Au loaded organic-inorganic hybrid perovskite incorporated with tin dioxide

2018 ◽  
Author(s):  
Y. Chen ◽  
X. Zhang ◽  
X. Wang ◽  
J. Xu
Keyword(s):  
Gas Sensors ◽  
Room Temperature ◽  
Tin Dioxide ◽  
Uv Light ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite ◽  
No2 Gas Sensors

scholarly journals Gas Sensors Based on Mechanically Exfoliated MoS2 Nanosheets for Room-Temperature NO2 Detection

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 2123 ◽  
Author(s):  
Wenli Li ◽  
Yong Zhang ◽  
Xia Long ◽  
Juexian Cao ◽  
Xin Xin ◽  
...  
Keyword(s):  
Gas Sensors ◽  
High Performance ◽  
Density Functional ◽  
Room Temperature ◽  
Mos2 Nanosheets ◽  
Mechanical Exfoliation ◽  
High Responsivity ◽  
Recovery Behavior ◽  
No2 Gas Sensors ◽  
No2 Detection

The unique properties of MoS2 nanosheets make them a promising candidate for high-performance room temperature gas detection. Herein, few-layer MoS2 nanosheets (FLMN) prepared via mechanical exfoliation are coated on a substrate with interdigital electrodes for room-temperature NO2 detection. Interestingly, compared with other NO2 gas sensors based on MoS2, FLMN gas sensors exhibit high responsivity for room-temperature NO2 detection, and NO2 is easily desorbed from the sensor surface with an ultrafast recovery behavior, with recovery times around 2 s. The high responsivity is related to the fact that the adsorbed NO2 can affect the electron states within the entire material, which is attributed to the very small thickness of the MoS2 nanosheets. First-principles calculations were carried out based on the density functional theory (DFT) to verify that the ultrafast recovery behavior arises from the weak van der Waals binding between NO2 and the MoS2 surface. Our work suggests that FLMN prepared via mechanical exfoliation have a great potential for fabricating high-performance NO2 gas sensors.

Temperature Sensitive and Reversible Halide Ion Exchange in Inorganic–Organic Hybrid CH3NH3PbI3−xBrx Mixed-Halide Perovskite

2021 ◽  
Vol 16 (4) ◽  
pp. 670-674
Author(s):  
Shuting Cui ◽  
Xun Sun ◽  
SiWen Tao ◽  
Huawei Zhou ◽  
Jie Yin ◽  
...  
Keyword(s):  
High Temperature ◽  
Ion Exchange ◽  
Band Gap ◽  
Room Temperature ◽  
Temperature Sensitive ◽  
Mechanism Study ◽  
Interesting Phenomenon ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite ◽  
Halide Perovskite

Ion exchange of organic-inorganic hybrid perovskite plays a significant role in controlling the performance of materials ant its devices. In this study, an interesting phenomenon was observed that the precipitate in suspension (CH3NH3PbI3−xBrx in γ-butyrolactone) brought out different colors at high and room temperature. The mechanism study appears that the phenomenon is controlled by temperature sensitive and reversible halide ion exchange in organic-inorganic hybrid CH3NH3PbI3−xBrx mixed-halide perovskite. The results of structure phase, element composition morphology and band gap illustrate that high temperature 55 °C is beneficial to the increasing of I content in MAPbI3−xBrx and room temperature or lower is advantageous to increasing of Br content in MAPbI3−xBrx. Compared with MAPbI0.76Br2.24 precipitate acquired at room temperature, MAPbI1.17Br1.83 precipitate got at high temperature illustrate wider lattice spacing, better crystallinity, better morphology and narrower band gap. The results and findings in this study will prompt the interest of readers or experts in the field of organic-inorganic hybrid perovskite materials and related optoelectronic applications.

NOx gas sensors based on layer-transferred n-MoS2/p-GaN heterojunction at room temperature: Study of UV light illuminations and humidity

2020 ◽  
Vol 308 ◽  
pp. 127700 ◽  
Author(s):  
Maddaka Reddeppa ◽  
Byung-Guon Park ◽  
G. Murali ◽  
Soo Ho Choi ◽  
Nguyen Duc Chinh ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Room Temperature ◽  
Uv Light ◽  
Temperature Study

Two-dimensional MoSe2 nanosheets via liquid-phase exfoliation for high-performance room temperature NO2 gas sensors

2019 ◽  
Vol 30 (44) ◽  
pp. 445503 ◽  
Author(s):  
Xi Chen ◽  
Xinwei Chen ◽  
Yutong Han ◽  
Chen Su ◽  
Min Zeng ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Gas Sensors ◽  
High Performance ◽  
Room Temperature ◽  
Two Dimensional ◽  
Liquid Phase Exfoliation ◽  
No2 Gas Sensors

Highly sensitive NO2 gas sensors based on hexagonal SnS2 nanoplates operating at room temperature

2019 ◽  
Vol 31 (7) ◽  
pp. 075501 ◽  
Author(s):  
Zhi Yang ◽  
Chen Su ◽  
Shutang Wang ◽  
Yutong Han ◽  
Xinwei Chen ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Room Temperature ◽  
Highly Sensitive ◽  
No2 Gas Sensors

scholarly journals A Water-Stable Organic-Inorganic Hybrid Perovskite for Solar Cells by Inorganic Passivation

Crystals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 83 ◽  
Author(s):  
Edward Guangqing Tai ◽  
Ryan Taoran Wang ◽  
Jason Yuanzhe Chen ◽  
Gu Xu
Keyword(s):  
Solar Cells ◽  
Uv Light ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Bandgap Energy ◽  
Lead Iodide ◽  
Perovskite Layer ◽  
Rapid Degradation ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite

Organic-inorganic hybrid halide perovskite solar cells (PSCs) have been a trending topic in recent years. Significant progress has been made to increase their power conversion efficiency (PCE) to more than 20%. However, the poor stability of PSCs in both working and non-working conditions results in rapid degradation through multiple environmental erosions such as water, heat, and UV light. Attempts have been made to resolve the rapid-degradation problems, including formula changes, transport layer improvements, and encapsulations, but none of these have effectively resolved the dilemma. This paper reports our findings on adding inorganic films as surface-passivation layers on top of the hybrid perovskite materials, which not only enhance stability by eliminating weak sites but also prevent water penetration by using a water-stable layer. The surface-passivated hybrid perovskite layer indicates a slight increase of bandgap energy (Eg=1.76 eV), compared to the original methylammonium lead iodide (MAPbI3, Eg=1.61 eV) layer, allowing for more stable perovskite layer with a small sacrifice in the photoluminescence property, which represents a lower charge diffusion rate and higher bandgap energy. Our finding offers an alternative approach to resolving the low stability issue for PSC fabrication.

scholarly journals Spin‐Polarized Electronic Transport through Ferromagnet/Organic–Inorganic Hybrid Perovskite Spinterfaces at Room Temperature

2019 ◽  
Vol 6 (19) ◽  
pp. 1900718 ◽  
Author(s):  
Kai Wang ◽  
Qin Yang ◽  
Jiashun Duan ◽  
Caixia Zhang ◽  
Fenggui Zhao ◽  
...  
Keyword(s):  
Electronic Transport ◽  
Room Temperature ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite ◽  
Spin Polarized

Ultra-sensitive hydrogen gas sensors based on Pd-decorated tin dioxide nanostructures: Room temperature operating sensors

2010 ◽  
Vol 35 (22) ◽  
pp. 12568-12573 ◽  
Author(s):  
Jun Min Lee ◽  
Ji-eun Park ◽  
Seri Kim ◽  
Sol Kim ◽  
Eunyoung Lee ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Room Temperature ◽  
Tin Dioxide ◽  
Hydrogen Gas ◽  
Hydrogen Gas Sensors ◽  
Temperature Operating

Room-temperature efficient NO2 gas sensors fabricated by porous 3D flower-like ZnAl-layered double hydroxides

2020 ◽  
Vol 44 (42) ◽  
pp. 18469-18480
Author(s):  
Ye Hong ◽  
Di Wang ◽  
Chong Lin ◽  
Shuiting Luo ◽  
Qingjiang Pan ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Hydrothermal Method ◽  
Gas Sensors ◽  
Layered Double Hydroxides ◽  
Room Temperature ◽  
Sodium Dodecyl ◽  
Three Dimensional ◽  
One Step ◽  
No2 Gas Sensors ◽  
Double Hydroxides

Three-dimensional (3D) flower-like zinc and aluminum-sodium dodecyl sulfate-layered double hydroxides (ZnAl-SDS-LDHs) intercalated by anions were prepared using a simple one-step hydrothermal method.

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