Article
Chemistry, Physical
Kalyani D. Kadam, Malik Abdul Rehman, Honggyun Kim, Shania Rehman, Muhammad Asghar Khan, Harshada Patil, Jamal Aziz, Sewon Park, Muhammad Abdul Basit, Karim Khan, Ayesha Khan Tareen, Muhammad Farooq Khan, Deok-kee Kim
Summary: This study presents a facile approach to fabricate a high-performance and stable MIS Schottky junction solar cell. By optimizing the thickness of the interfacial layer and utilizing a combination of dopants, the efficiency of the solar cell was significantly improved, reaching up to 14.01%.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Shayan Angizi, P. Ravi Selvaganapathy, Peter Kruse
Summary: This study demonstrates the operation of a graphene/n-type silicon Schottky junction in aqueous media and investigates the impacts of ionic strength, oxidation-reduction potential, and pH of an aqueous solution on diode characteristics. The introduction of functional groups enables the functionalized device to exhibit a higher response upon exposure to free chlorine.
Article
Chemistry, Analytical
Katarzyna Drozdowska, Adil Rehman, Janusz Smulko, Sergey Rumyantsev, Bartlomiej Stonio, Aleksandra Krajewska, Mateusz Slowikowski, Maciej Filipiak, Pavlo Sai, Grzegorz Cywinski
Summary: The effect of ultraviolet or blue irradiation on graphene/n-doped silicon Schottky junctions for gas sensing was investigated. The response of Schottky diodes to nitrogen dioxide and tetrahydrofuran was observed on the current-voltage characteristics, with different impacts on the forward and reverse regions. The detection limits for NO2 and THF were lowered by the influence of the organic molecules. The width of the junction area is crucial for optimizing graphene-silicon Schottky-based sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Nanoscience & Nanotechnology
Cihyun Kim, Tae Jin Yoo, Kyoung Eun Chang, Min Gyu Kwon, Hyeon Jun Hwang, Byoung Hun Lee
Summary: The performance of a graphene/Ge Schottky junction near-infrared photodetector is significantly enhanced by inserting a thin Al2O3 interfacial layer between graphene and Ge. Dark current is reduced by two orders of magnitudes, and the specific detectivity is improved to 1.9 x 10(10) cm . Hz(1/2)W(-1). The responsivity is improved to 1.2 AW(-1) with an interfacial layer from 0.5 AW(-1) of the reference devices. The normalized photo-todark current ratio is improved to 4.3 x 10(7) W-1 at a wavelength of 1550 nm, which is 10-100 times higher than those of other Ge photodetectors.
Article
Engineering, Electrical & Electronic
Ala K. Jehad, Mehmet Fidan, Ozhan Unverdi, Cem Celebi
Summary: A self-powered, high-performance graphene/Silicon Carbide ultraviolet photodetector was fabricated, and the effect of using monolayer and bilayer graphene on device performance parameters was investigated. The photodetector exhibited high spectral responsivity, maximum detectivity, and minimum noise equivalent power. Bilayer graphene showed no significant change in spectral responsivity but improved the response speed compared to monolayer graphene.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Engineering, Environmental
Libo Wang, Haiyan Tan, Liuyang Zhang, Bei Cheng, Jiaguo Yu
Summary: In this study, a composite material was developed by in-situ deposition of few-layer graphene on the surface of ZnO, leading to enhanced photocatalytic CO2 reduction performance. The improvement was attributed to the intimate interfacial contact and Schottky junction between ZnO and graphene, as well as the photothermal effect of graphene and pi-pi conjugation interaction with CO2 molecules. This work not only provides a feasible method for the in-situ growth of graphene, but also presents an efficient photocatalyst for CO2 reduction.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Multidisciplinary Sciences
Gun Chaloeipote, Jaruwan Samarnwong, Pranlekha Traiwatcharanon, Teerakiat Kerdcharoen, Chatchawal Wongchoosuk
Summary: In this study, a low-cost, fast and simple resistive-type humidity sensor based on graphene quantum dots and silver nanoparticles was developed, showing excellent humidity response and fast response/recovery times. The sensing mechanism involves the formation of Schottky junction and intrinsic synergistic effects between GQDs and AgNPs.
ROYAL SOCIETY OPEN SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Cihyun Kim, Tae Jin Yoo, Min Gyu Kwon, Kyoung Eun Chang, Hyeon Jun Hwang, Byoung Hun Lee
Summary: The structure of a gate-controlled graphene/germanium hybrid photodetector was optimized by splitting the active region, resulting in significantly improved infrared detection capability.
Article
Chemistry, Physical
Sen Zhang, Kang Liu, Benjian Liu, Xiaohui Zhang, Pengfei Qiao, Jiwen Zhao, Yicun Li, Xiaobin Hao, Ying Liang, Bo Liang, Wenchao Zhang, Bing Dai, Jiecai Han, Jiaqi Zhu
Summary: Surface potential pinning effect is a common rule in semiconductor materials, which can have a significant impact on device performance. However, this effect is often overlooked when studying diamond devices. In this study, we investigated the contact band diagram between metals with different work functions and oxygen terminated diamond. The results showed that the oxygen terminal can pin the Schottky barrier height. Additionally, the symmetrical photocurrent-voltage characteristics observed in the experiment further support this conclusion.
Article
Chemistry, Multidisciplinary
P. Sakthivel, K. Ramachandran, M. Malarvizhi, S. Karuppuchamy, P. Manivel
Summary: We present a practical vacuum pressure sensor based on graphene anchored on vertically aligned zinc oxide nanorod. The Schottky junction in the heterosystem shows rectifying behavior and provides high current responses under different pressures, making it a potential choice for high sensitivity vacuum pressure sensors.
Article
Chemistry, Physical
Di Guo, Pengwen Guo, Yuan Yao, Lele Ren, Mengmeng Jia, Wei Wang, Yulong Wang, Yufei Zhang, Aifang Yu, Junyi Zhai
Summary: This study demonstrates the significant enhancement of flexoelectric potential and flexotronics in single crystal silicon strips through bending, with the rate of change in Schottky barrier height increasing as the material becomes thinner. The flexoelectric polarization direction can be tuned by changing the bending direction. The working mechanism of flexoelectricity induced by the synergistic contribution of the surface piezoelectric effect and bulk flexoelectric effect is elucidated theoretically.
Article
Chemistry, Multidisciplinary
Yi-Yen Hsieh, Hsing-Yu Tuan
Summary: An oxygen vacancy-tailored Schottky heterostructure composed of PVPBSO nanocrystals and mWFG is designed to enhance K+ transport through carrier inversion and efficient charge redistribution. The PVPBSO/mWFG exhibits high activity and low resistance in electrochemical reactions, resulting in a capacity of 430 mA h g(-1) and a rate capability exceeding 2000 mA g(-1). The interface and junction engineering in this study contribute to the improvement of electrochemical processes in potassium-ion batteries.
Article
Engineering, Electrical & Electronic
Jingkun Cong, Afzal Khan, Jiajun Li, Ying Wang, Mingsheng Xu, Deren Yang, Xuegong Yu
Summary: The study demonstrates a method to grow large-area graphene nanowalls (GNWs) on a Si substrate using plasma-enhanced atomic layer deposition (PEALD) technique and develop high-performance GNWs-Si heterostructure infrared photodetectors (PDs). The fabricated PD exhibits excellent light absorption and high responsivity, fast response speed, and high specific detectivity, showing great potential for Si-based optoelectronics.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Shunshuo Cai, Yangyang Ju, Yangming Wang, Xiaowei Li, Tuan Guo, Haizheng Zhong, Lingling Huang
Summary: In this study, a novel oxygen optical fiber sensor based on halide perovskites and tilted fiber Bragg grating (TFBG) was demonstrated. The sensor showed fast response time and low limit of detection, making it suitable for accurate oxygen detection at low concentrations.
Article
Chemistry, Analytical
Lei Feng, Wenjing Qin, Yanli Wang, Changshun Gu, Xinxin Li, Junji Chen, Jianxing Chen, Hanying Qiao, Min Yang, Zhenhao Tian, Shougen Yin
Summary: We constructed 3D porous Ti3C2Tx MXene/Graphene/AuNPs composites with highly hydrophilic microenvironment and enhanced electron transport. The MGA/GOx glucose sensor showed high sensitivity at low concentrations, with a linear current range from 2 μM to 0.4 mM and 0.4 mM to 6 mM. The detection limit was 2 μM and the response time was less than 3 s. This sensor can be applied to the detection of glucose in human sweat.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Packiyaraj Perumal, Rajesh Kumar Ulaganathan, Raman Sankar, Yu-Ming Liao, Tzu-Min Sun, Ming-Wen Chu, Fang Cheng Chou, Yit-Tsong Chen, Min-Hsiung Shih, Yang-Fang Chen
ADVANCED FUNCTIONAL MATERIALS
(2016)
Article
Physics, Applied
Ching-Cheng Cheng, Jun-Yu Zhan, Yu-Ming Liao, Tai-Yuan Lin, Ya-Ping Hsieh, Yang-Fang Chen
APPLIED PHYSICS LETTERS
(2016)
Article
Materials Science, Multidisciplinary
Yu-Ming Liao, Ying-Chih Lai, Packiyaraj Perumal, Wei-Cheng Liao, Chi-Yuan Chang, Chi-Shiun Liao, Shih-Yao Lin, Yang-Fang Chen
ADVANCED MATERIALS TECHNOLOGIES
(2016)
Proceedings Paper
Engineering, Electrical & Electronic
Yu-Ming Liao, Ying-Chih Lai, Packiyaraj Perumal, Wei-Cheng Liao, Chi-Yuan Chang, Chi-Shiun Liao, Shih-Yao Lin, Yang-Fang Chen
2017 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2017)