Article
Engineering, Electrical & Electronic
P. V. Karthik Yadav, B. Ajitha, Y. Ashok Kumar Reddy, Vasudeva Reddy Minnam Reddy
Summary: The study focuses on developing a hybrid bilayer of a WO3/GR photodetector device which can detect both UV and visible radiation, enhancing photocurrent. The mechanism of how photoelectrons are drawn into GR without being trapped into WO3 is explained in detail.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Physics, Condensed Matter
H. Bencherif, L. Dehimi, G. Faggio, G. Messina, F. Pezzimenti, F. Meddour, M. A. Abdi, F. G. Della Corte
Summary: This paper investigates the role of a thin interfacial oxide layer in reducing the dark current of an n-Si metal semiconductor metal (MSM) ultraviolet (UV) photodetector and explores the benefits of graphene monolayer as a transparent electrode. The proposed design using graphene outperforms conventional designs using silver and gold electrodes, achieving high responsivity, detectivity, and low dark current. The study also examines the effect of graphene work function on device performance.
MICRO AND NANOSTRUCTURES
(2022)
Article
Physics, Applied
Jing Jiang, Guangcan Luo, Ziling Zhang, Bo Tan, Xuxiang Guo, Wei Li, Jingquan Zhang
Summary: This paper demonstrates a new heterojunction ultraviolet photodetector built in a superstrate configuration with optimized performance through dip-coating method. By introducing Au doping and rGO layer, the performance parameters of the photodetector are effectively improved.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Shan Li, Yusong Zhi, Chao Lu, Chao Wu, Zuyong Yan, Zeng Liu, Jian Yang, Xulong Chu, Daoyou Guo, Peigang Li, Zhenping Wu, Weihua Tang
Summary: The paper presents a broadband ultraviolet self-powered photodetector based on a beta-Ga2O3/CuI heterostructure, demonstrating excellent performance under UVC light and remarkable stability. Insights into the intrinsic physical behaviors of the device are investigated through energy band diagrams and first principle calculations.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Furqan Khairi Mohammed, Khi Poay Beh, Asmiet Ramizy, Naser M. Ahmed, Fong Kwong Yam, Zainuriah Hassan
Summary: The study demonstrates the role of graphene in enhancing the performance of a porous GaN-based UV photodetector, particularly in terms of UV sensitivity. The cladding of graphene on the porous GaN region improves charge accumulation and conductance, leading to a significant enhancement in UV sensing. However, there is limited improvement in leakage current with the addition of graphene.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Multidisciplinary
Jie Zhang, Fengjing Liu, Dong Liu, Yanxue Yin, Mingxu Wang, Zixu Sa, Li Sun, Xiaoxin Zheng, Xinming Zhuang, Zengtao Lv, Wenxiang Mu, Zhitai Jia, Yang Tan, Feng Chen, Zai-xing Yang
Summary: The study investigates the photodetection performance of thin amorphous Ga2O3 nanosheet, which has been widely used as dielectric and passivation materials. By peeling off from the Ga solid-melt surface, the amorphous Ga2O3 nanosheet is confirmed to have an amorphous characteristic through selected area electron diffraction and X-ray diffraction. However, due to limited absorption ability and abundant defect states, the amorphous Ga2O3 nanosheet shows low photocurrent and slow response time even at a bias voltage. To enhance the photodetection performance, PbI2 nanosheet is grown on the surface of the amorphous Ga2O3 nanosheet, forming a Ga2O3/PbI2 heterojunction photodetector. The heterojunction photodetector exhibits larger photocurrent (1.6 nA) and faster response times (2 ms rise time and 3 ms decay time) even at a zero bias voltage, and it also shows excellent self-powered photoresponse characteristic and mechanical flexibility when configured into a flexible photodetector. This work provides a pathway for the development of high-performance flexible optoelectronic devices.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Physical
Maria Vanessa Balois-Oguchi, Norihiko Hayazawa, Satoshi Yasuda, Katsuyoshi Ikeda, Nguyen Tien Quang, Mary Clare Escano, Takuo Tanaka
Summary: Wrinkles are inevitable during the growth of graphene, and they are influenced by the thermal expansion coefficients of graphene and the underlying substrate. The shape and strain variations of micrometer-sized wrinkles have been found to affect the electronic properties of graphene. This study investigates the physical and electronic nature of nanometer-sized wrinkles using tip-enhanced Raman spectroscopy (TERS), which is essential for the characterization of nanodevices.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
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
Nanoscience & Nanotechnology
Shiya Huang, Jun Lin, Xiuyu Lin, Zhao Wang, Yuanyu Xie, Xiong Chen, Xiangzeng Kong, Wei Zheng, Qichang Hu
Summary: In this work, a p-Gr/i-Sm2O3/n-SiC heterojunction photovoltaic solar-blind UV sensor was constructed for the first time, overcoming the high resistivity and poor photoelectric response performance of rare-earth oxides. This detector exhibited outstanding performance with a responsivity of 19.8 mA/W and an open-circuit voltage of 0.68 V. The fabrication of this high-performance Sm2O3-based photovoltaic UV detector has broadened the application fields of rare-earth oxide semiconductors, making it valuable for future research in relevant fields.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Optics
H. Bencherif, F. Meddour, L. Dehimi, G. Faggio, G. Messina, F. Pezzimenti, M. A. Abdi, F. G. Della Corte
Summary: A novel 4H-SiC metal-semiconductor-metal photodetector design incorporating Graphene electrode engineering and gold nanoparticles was proposed in this study, showing improved optical performance through intense light trapping formalism. The research findings demonstrate the design's capability to reduce unwanted shadowing effects, enhance absorption, and achieve better responsiveness after optimization.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Jianya Zhang, Min Jiang, Min Zhou, Wenxian Yang, Yukun Zhao, Shulong Lu
Summary: This work demonstrates a self-powered photoelectrochemical photodetector in seawater based on (In,Ga)N/GaN core-shell heterojunction nanowires. Compared to pure water, the PD in seawater has a much faster response speed due to the upward and downward overshooting features of current. The main factors affecting the PD behavior in seawater are proposed to be the instantaneous temperature gradient, carrier accumulation and elimination on the semiconductor/electrolyte interfaces, as well as the Na+ and Cl- ions.
Article
Optics
Jianya Zhang, Min Jiang, Min Zhou, Wenxian Yang, Yukun Zhao, Shulong Lu
Summary: Due to the requirements of oceanography exploration, self-powered photodetectors with low-power consumption are crucial. This study successfully demonstrates a self-powered photoelectrochemical (PEC) photodetector in seawater based on (In,Ga)N/GaN core-shell heterojunction nanowires. The faster response speed is attributed to the upward and downward overshooting features of current in seawater. The analysis shows that Na+ and Cl- ions enhance the conductivity and accelerate the oxidation-reduction reaction, and they are proposed as the main factors influencing the behavior of the photodetector in seawater.
Article
Chemistry, Multidisciplinary
Sa Cai, Chaolei Zuo, Jiayu Zhang, Hui Liu, Xiaosheng Fang
Summary: A paper-based wearable photodetector is reported, which can simultaneously measure transient light intensity and accumulated light dosage. The photodetector fully utilizes the natural hygroscopicity and softness of paper, showing decent flexibility. This work introduces a new type of wearable photodetector by structure design and material selection, shedding light on more novel works for convenient and practical photodetection.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Shusen Lin, Md. Ahasan Habib, Shalmali Burse, Rutuja Mandavkar, Tasmia Khalid, Mehedi Hasan Joni, Ming-Yu Li, Sundar Kunwar, Jihoon Lee
Summary: A novel hybrid UV photodetector (GQD/ZnO/AHNP PD) is demonstrated using AuPt alloy hybrid nanoparticles, ZnO quantum dots, and graphene quantum dots, achieving high performance with a responsivity of 2299 mA/W, detectivity of 7.04 x 1010 jones, and external quantum efficiency of 741%.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Chao-Yen Chang, Rong-Ming Ko, Sin-Jhih Huang, Meng-Yung Su, Chien-Hung Wu, Shui-Jinn Wang
Summary: This article introduces a UVPD based on IGZO thin-film transistors, which utilizes a NiO capping layer to improve UV detection performance. It demonstrates the advantages of this UVPD over traditional ones.
IEEE ELECTRON DEVICE LETTERS
(2022)
