Article
Engineering, Electrical & Electronic
Zhoubin Boroun, Mohammad Ghorbani, Raheleh Mohammadpour, Ali Moosavi
Summary: Metal-oxide gas sensors, particularly the SnO2-CuO system, are widely used for detecting H2S gas. While the previous 2D thin bilayer model explained some aspects of the sensor's performance, experimental research showed that multicomponent heterostructures have higher response. By introducing an n-p-n junction in a 3D model, the sensitivity of the sensor element towards H2S gas significantly improved, indicating the potential for optimized sensor fabrication.
IEEE SENSORS JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Dong Hun Lee, Honghwi Park, Michael Clevenger, Hyeonghun Kim, Chung Soo Kim, Mingyuan Liu, Giyong Kim, Han Wook Song, Kwangsoo No, Sung Yeol Kim, Dong-Kyun Ko, Anne Lucietto, Hongsik Park, Sunghwan Lee
Summary: This study demonstrates a simple processing route to fabricate oxide-based p-n heterojunctions with high rectification performance. By selecting appropriate materials and post-processing methods, high on/off rectification behavior, low saturation current, and small turn-on voltage were achieved in the heterojunctions.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Cheuk Kai Gary Kwok, Ying Wang, Xingyu Shu, Kin Man Yu
Summary: p-Type SnO can be oxidized into n-type SnO2, and we successfully fabricated an all-Tin Oxide transparent pn quasi-homojunction. Comparison with a p-SnO/n-ZnO heterojunction showed similar rectification behavior. XPS measurements revealed type II band offsets in both SnO2 and ZnO at the Gamma point, with respective valence band (conduction band) offsets of 2.8 eV (1.9 eV) and 2.4 eV (1.33 eV). The SnO/SnO2 p-n structure exhibited reasonable rectification with an ideality factor of -12.3, suggesting potential applications in transparent p-n junction devices.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Danhao Wang, Xin Liu, Yang Kang, Xiaoning Wang, Yuanpeng Wu, Shi Fang, Huabin Yu, Muhammad Hunain Memon, Haochen Zhang, Wei Hu, Zetian Mi, Lan Fu, Haiding Sun, Shibing Long
Summary: The light-detection electrochemical cell based on vertically aligned p-AlGaN/n-GaN p-n heterojunction nanowires in an electrolyte environment can exhibit a photoresponse with reversed polarity depending on the wavelength of light. This device offers high responsivity at different wavelengths.
NATURE ELECTRONICS
(2021)
Article
Physics, Condensed Matter
M. Sakthivel, S. Stella Mary, V. Balasubramani, Mohd Shkir, H. Elhosiny Ali
Summary: A new photodiode using Barium (Ba) and Tin (Sn) films prepared by Jet Nebulizer Spray Pyrolysis (JSNP) technique was studied, and the effect of dopant concentration on its structural, surface morphology, and optical property was analyzed. Copper/Barium and Tin n-type Silicon photodiodes were fabricated and their I-V characteristics were evaluated. The performance of the Ag/Ba-Sn/n-si/Ag photodiode was significantly improved under optimized experimental conditions, making it suitable for future Opto-electronics industry.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Engineering, Electrical & Electronic
Kenan Ozel, Abdullah Yildiz
Summary: Metal oxide semiconductor-based p-n heterojunctions have attracted significant attention in the electronic and optoelectronic industry for their simple production and superior performance. This study investigates the electrical transport characteristics of an n-SnO2/p-Si heterojunction diode, revealing excellent rectifying behavior and providing insight into its energy-band alignment and carrier transport mechanism.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Engineering, Electrical & Electronic
Joao V. M. Lima, Stevan B. O. Santos, Rafael A. Silva, Miguel H. Boratto, Carlos F. O. Graeff, Luis V. A. Scalvi
Summary: Cu-doped SnO2 thin films were investigated for gas sensing in H2S atmosphere, proposing a p-n Cu2S/SnO2 heterojunction and studying the electrical transport of the device. Analysis through X-ray diffractograms and optical absorption confirmed the low crystallinity and high disorder of the materials.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Analytical
Guangshuo Cai, Caoyuan Mu, Jiaosheng Li, Liuan Li, Shaoheng Cheng, Qiliang Wang, Xiaobiao Han
Summary: This paper investigates diamond-based vertical p-n junction diodes with step edge termination using Silvaco simulation. The step edge termination has weak influences on forward characteristics and helps to suppress electric field crowding. However, the breakdown voltage of the diode with simple step edge termination is still lower than the ideal one. To enhance the breakdown voltage, a p-n junction-based junction termination extension is combined with the step edge termination, resulting in a more uniform electric field distribution and higher device performance.
Article
Chemistry, Multidisciplinary
Jasmin-Clara Buerger, Sebastian Gutsch, Yi Thomann, Ralf Thomann, Bjoern Christian, Oliver Ambacher, Margit Zacharias
Summary: This study discusses the experimental tuning of freestanding SnO2 nanowires growth to a laterally aligned nanowire growth mode, with thermodynamic considerations for influencing parameters. The research shows that a continuous gold film inhibits the laterally aligned growth, leading to growth only at the edges while the central region is covered by freestanding wires.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Physical
Junseok Jeong, Dae Kwon Jin, Joonghoon Choi, Junho Jang, Bong Kyun Kang, Qingxiao Wang, Won Il Park, Mun Seok Jeong, Byeong-Soo Bae, Woo Seok Yang, Moon J. Kim, Young Joon Hong
Summary: Remote epitaxy of GaN p-n homojunction microcrystals has been demonstrated for fabricating transferable, flexible white light-emitting diodes (WLEDs). The WLEDs show reliable performance even after repetitive bending and cycling temperature environments, making them suitable for flexible and modular light panels.
Article
Optics
Mejda Ajili, Rihab Ben Ayed, Najoua Turki Kamoun
Summary: Novel hetero-junctions of p-CuO/n-ZnO:Sn and p-CuO/n-alpha-Fe2O3 were synthesized using the chemical spray pyrolysis technique. The physical, optical, and electrical characteristics of the CuO thin layers were investigated, with the p-CuO/n-ZnO:Sn hetero-junction showing the highest efficiency in photo-catalytic degradation of methylene blue dye under sunlight irradiation.
JOURNAL OF LUMINESCENCE
(2022)
Article
Engineering, Electrical & Electronic
Fang Zhang, Xuefeng Zheng, Yunlong He, Xichen Wang, Yuehua Hong, Xiangyu Zhang, Zijian Yuan, Yingzhe Wang, Xiaoli Lu, Jun Yin, Yonghui Gao, Xiaohua Ma, Yue Hao
Summary: This study compares the performance of NiOx/P-Ga2O3 heterojunction barrier Schottky (HJBS) diodes with honeycomb and stripe anode layouts in terms of static characteristics, reverse recovery characteristics, and surge current robustness. The results show that honeycomb HJBS diodes have a higher breakdown voltage (BV) and a better B-FOM compared to stripe HJBS diodes. Additionally, the honeycomb layout exhibits lower peak electric field and better surge current robustness. Furthermore, optimizing the structural parameters of the honeycomb layout can further enhance its forward conduction ability.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Engineering, Electrical & Electronic
Cheng-Liang Hsu, Jia-Xin Gan, Han-Ting Hsueh, Yi-Hung Liu
Summary: In this study, p-type amorphous structure Co3O4 nanoflowers were synthesized on n-type single crystal ZnO nanowires/glass substrate using chemical bath deposition. The humidity sensing of the p-n nanocomposite exhibited p-type characteristics at lower than 50% RH, and n-type properties at higher than 50% RH. The p-n nanocomposite sensor showed good sensing ability for various organic solvent gases, with ethanol being the most sensitive.
IEEE ELECTRON DEVICE LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Yue-Xing Chen, Xiao-Lei Shi, Zhuang-Hao Zheng, Fu Li, Wei-Di Liu, Wen-Yi Chen, Xin-Ru Li, Guang-Xing Liang, Jing-Ting Luo, Ping Fan, Zhi-Gang Chen
Summary: This study introduces p-type two-dimensional WSe2 nanoinclusions into n-type polycrystalline SnSe for the formation of p-n junctions, resulting in enhanced thermoelectric performance through phonon scattering and Fermi level control.
MATERIALS TODAY PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Yubin Kang, Jilong Tang, Fahad Azad, Xiaotian Zhu, Xue Chen, Xueying Chu, Dengkui Wang, Xuan Fang, Dan Fang, Fengyuan Lin, Kexue Li, Xiaohua Wang, Zhipeng Wei
Summary: Controlling the crystal structure of GaAs nanowires with Si doping and V/III ratio has been shown to influence the nucleation of ZB phase and result in different conductivity types in FET devices. These results provide a clear route towards nanoscale device fabrication.