scholarly journals Compositional engineering of the pi-conjugated small molecular VOPcPhO : Alq3 complex to boost humidity sensing

RSC Advances ◽  
2017 ◽  
Vol 7 (32) ◽  
pp. 19780-19786 ◽  
Author(s):  
Noshin Fatima ◽  
Fakhra Aziz ◽  
Zubair Ahmad ◽  
M. A. Najeeb ◽  
M. I. Azmeer ◽  
...  
Keyword(s):  
Organic Semiconductor ◽  
Humidity Sensor ◽  
Solution Processed ◽  
Humidity Sensing ◽  
Pi Conjugated ◽  
Hydroxy Quinoline

This study exhibits a solution-processed organic semiconductor humidity sensor based on vanadyl 2,9,16,23-tetraphenoxy-29H,31H-phthalocyanine (VOPcPhO), tris-(8-hydroxy-quinoline)aluminum (Alq3), and their composites.

scholarly journals Wide range and highly linear signal processed systematic humidity sensor array using Methylene Blue and Graphene composite

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Muhammad Umair Khan ◽  
Gul Hassan ◽  
Rayyan Ali Shaukat ◽  
Qazi Muhammad Saqib ◽  
Mahesh Y. Chougale ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Linear Combination ◽  
Linear Function ◽  
Humidity Sensor ◽  
Sensor Array ◽  
Combination Method ◽  
Humidity Sensing ◽  
Sensing Applications ◽  
Wide Range ◽  
Graphene Flakes

AbstractThis paper proposes a signal processed systematic 3 × 3 humidity sensor array with all range and highly linear humidity response based on different particles size composite inks and different interspaces of interdigital electrodes (IDEs). The fabricated sensors are patterned through a commercial inkjet printer and the composite of Methylene Blue and Graphene with three different particle sizes of bulk Graphene Flakes (BGF), Graphene Flakes (GF), and Graphene Quantum Dots (GQD), which are employed as an active layer using spin coating technique on three types of IDEs with different interspaces of 300, 200, and 100 µm. All range linear function (0–100% RH) is achieved by applying the linear combination method of nine sensors in the signal processing field, where weights for linear combination are required, which are estimated by the least square solution. The humidity sensing array shows a fast response time (Tres) of 0.2 s and recovery time (Trec) of 0.4 s. From the results, the proposed humidity sensor array opens a new gateway for a wide range of humidity sensing applications with a linear function.

Low-voltage-driven organic phototransistors based on a solution-processed organic semiconductor channel and high k hybrid gate dielectric

2017 ◽  
Vol 5 (38) ◽  
pp. 9838-9842 ◽  
Author(s):  
Bo-Yi Jiang ◽  
Sureshraju Vegiraju ◽  
Anthony Shiaw-Tseh Chiang ◽  
Ming-Chou Chen ◽  
Cheng-Liang Liu
Keyword(s):  
Organic Semiconductor ◽  
Gate Dielectric ◽  
Low Voltage ◽  
Solution Processed ◽  
High K ◽  
Multilevel Memory

Low-voltage-driven organic phototransistors integrate the photodetector and photomemory functions within one single device to precisely sense the brightness and carry out multilevel memory operations.

scholarly journals Self-assembly of a nano hydrogel colloidal array for the sensing of humidity

RSC Advances ◽  
2018 ◽  
Vol 8 (18) ◽  
pp. 9963-9969 ◽  
Author(s):  
Zhe Wang ◽  
Min Xue ◽  
Herong Zhang ◽  
Zihui Meng ◽  
Kenneth J. Shea ◽  
...  
Keyword(s):  
Self Assembly ◽  
Humidity Sensor ◽  
Low Cost ◽  
Three Dimensional ◽  
Humidity Sensing ◽  
Self Assembled

A simple and low-cost humidity sensor based on self-assembled three dimensional nanohydrogel colloidal array was prepared for humidity sensing.

Photoelectric Effect of Hybrid Ultraviolet-Sensitized Phototransistors from N-type Organic Semiconductor and All-Inorganic Perovskite Quantum Dot Photosensitizer

Nanoscale ◽  
2021 ◽  
Author(s):  
Shao-Huan Hong ◽  
Shakil N. Afraj ◽  
Ping-Yu Huang ◽  
Yi-Zi Yeh ◽  
Shih-Huang Tung ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Organic Semiconductor ◽  
Light Absorption ◽  
Photoelectric Effect ◽  
Strong Light ◽  
Solution Processed ◽  
Inorganic Perovskite ◽  
Perovskite Quantum Dots ◽  
Low Dimensional

Low-dimensional all-inorganic perovskite quantum dots (QDs) have been increasingly developed as photo-sensing materials in the field of photodetectors because of their strong light-absorption capability and broad bandgap tunability. Here, solution-processed...

Nanoconfining solution-processed organic semiconductors for emerging optoelectronics

2021 ◽  
Author(s):  
Yuze Zhang ◽  
Alina Chen ◽  
Min-Woo Kim ◽  
Aida Alaei ◽  
Stephanie S. Lee
Keyword(s):  
Charge Transport ◽  
Organic Semiconductors ◽  
Organic Semiconductor ◽  
Light Emission ◽  
Solution Processed ◽  
Semiconductor Crystals

This tutorial review highlights the role of nanoconfinement in selecting for orientations and polymorphs of organic semiconductor crystals that are optimized for optoelectronic processes, including charge transport and light emission.

Fabrication of bulk alumina structures with humidity sensing capabilities using direct ink write technique

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Anabel Renteria ◽  
Luisa F. Garcia ◽  
Jorge A. Diaz ◽  
Luis C. Delfin ◽  
Jaime E. Regis ◽  
...  
Keyword(s):  
Humidity Sensor ◽  
Post Processing ◽  
Humidity Sensors ◽  
Moisture Sensitivity ◽  
Humidity Sensing ◽  
Content Type ◽  
Lattice Design ◽  
Processing Treatment ◽  
Binder Ratio ◽  
Order Of Magnitude

Purpose The purpose of this study is to evaluate different 3D structures for humidity sensing that will enable the fabrication of complex geometries with high moisture sensitivity. Design/methodology/approach Humidity sensors based on alumina ceramics were fabricated using direct ink write (DIW) technique. Different engineered surface area, polymer binder ratio and post-processing treatment were considered to increase moisture sensitivity. Findings It was found that the binder ratio plays an important role in controlling the rheology of the paste during printing and determining the pore size after post-processing treatment. The sensibility of the fabricated humidity sensor was investigated by measuring its capacitance response toward relative humidity (RH) varying from 40% to 90% RH at 25°C. It is shown that using 3D lattice design, printed alumina humidity sensor could improve sensitivity up to 31.6 pF/RH%, over an order of magnitude higher than solid alumina. Originality/value Most of the alumina humidity sensors available are films in nature because of manufacturing difficulties, which limited its potential of higher sensitivity, and thus broader applications. In this paper, a novel 3D alumina humidity sensor was fabricated using DIW 3D printing technology.

scholarly journals Highly Sensitive Temperature and Humidity Sensor Based on Carbon Nanotube-Assisted Mismatched Single-Mode Fiber Structure

Micromachines ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 521 ◽  
Author(s):  
Yuan ◽  
Qian ◽  
Liu ◽  
Wang ◽  
Yu
Keyword(s):  
Carbon Nanotube ◽  
Humidity Sensor ◽  
Single Mode ◽  
Small Region ◽  
Single Mode Fiber ◽  
Fiber Structure ◽  
Humidity Sensing ◽  
Highly Sensitive ◽  
Temperature And Humidity ◽  
Stable Performance

Here we report on a miniaturized optical interferometer in one fiber based on two mismatched nodes. The all-fiber structure shows stable performance of temperature and humidity sensing. For temperature sensing in large ranges, from 40 to 100 °C, the sensor has a sensitivity of 0.24 dB/°C, and the adjusted R-squared value of fitting result reaches 0.99461 which shows a reliable sensing result. With carbon nanotubes coating the surface of the fiber, the temperature sensitivity is enhanced from 0.24561 to 1.65282 dB/°C in a small region, and the performance of humidity sensing becomes more linear and applicable. The adjusted R-squared value of the linear fitting line for humidity sensing shows a dramatic increase from 0.71731 to 0.92278 after carbon nanotube coating, and the humidity sensitivity presents 0.02571 nm/%RH.

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