Article
Environmental Sciences
Ajeet Kumar Singh, Rajan Walia, Madan Singh Chauhan, Ravi S. Singh, Vineet Kumar Singh
Summary: Through numerical simulation studies, it was found that interface defects have a significant impact on the performance of heterojunction solar cells, and increasing the bandgap of the absorber layer can improve the performance of the solar cells. Compared to n-TiO2/p-Cu2O heterojunction solar cells, n-TiO2/p-WS2 heterojunction solar cells showed an increase in performance of nearly 182%, and the performance was further enhanced by about 139% with the addition of a p-Cu2O hole transport layer. The best-simulated efficiency of the proposed hetero-structure solar cell was 28.86%.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
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
Emine Guneri, Fatma Gode, Mehmet Ari, Buket Saatci
Summary: This study focused on the design of heterojunctions using p-Cu2O and n-CdS thin films, investigating the effect of Cu2O thin films on the properties of the heterojunction. Structural, morphological, optical, and electrical properties were examined using various analytical techniques to understand the characteristics of the heterojunction.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Physical
Xiaowan Gong, Jianhong Ye, Yiqiao Wang, Shuping Su, Shaobo Chen, Yu Xie, Zheyuan Fan, Yun Ling, Jinsheng Zhao
Summary: Forming CN/Cu2O composite photocatalysts by growing Cu2O in situ on C3N4 can enhance the photocatalytic performance of carbon nitride, with significantly improved efficiency of photocatalysis.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Nanoscience & Nanotechnology
Yun Jia, Sora Sato, Aboulaye Traore, Ryo Morita, Erwann Broccoli, Fenfen Fenda Florena, Muhammad Monirul Islam, Hironori Okumura, Takeaki Sakurai
Summary: This work reports on p-type cuprous oxide (Cu2O) films grown on beta gallium oxide (beta-Ga2O3) substrates by magnetron sputtering. The resulting Cu2O/beta-Ga2O3 heterojunction p-n diodes demonstrate superior performance compared to devices fabricated with polycrystalline Cu2O thin films. Analysis reveals diverse carrier transport mechanisms in the fabricated devices.
Article
Chemistry, Physical
Pegah Latifian, Seyyedeh Fatemeh Hosseini, Mir Saeed Seyed Dorraji, Mohammad Hossein Rasoulifard
Summary: The present work focuses on the hydrothermal synthesis of Bi2S3 and its doped materials for photocatalytic applications. The Ti-doped Bi2S3/1%NiO nanocomposite showed the highest photocatalytic efficiency among the synthesized samples, with an 80% elimination rate of methylene blue (MB) after 500 minutes of visible light illumination. The high photocatalytic activity can be attributed to the high BET surface area and p-n junction formed between Bi2S3 and NiO, as well as the increased band gap and improved transfer rate of photo-induced electrons due to Ti (IV) doping.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Energy & Fuels
Zhiliang Jin, Yue Cao
Summary: The construction of a reasonable interface structure can directionally regulate carrier transference for photocatalyst and improve photocatalytic performance. The formation of p-n heterojunction was accelerated by the opposite surface electronegativity of CoAl-LDH and Cu2O, providing a viable thermodynamic path for the transference of electrons. The strong internal electric field in p-n heterojunction greatly improved the charges separation and diversion, enhancing the number of electrons participating in reduction reactions.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Jie Jiang, Yuqiang Ding
Summary: In this study, for the first time, the hydrogenation of C=N bonds on the surface of TiO2 was achieved using Cu2O/TiO2 type-II (p-n) heterojunction. The probe reactions demonstrated that the hydrogenation of C=N bonds on TiO2 surface can be achieved through borrowing hydrogen reaction (BH, alcohols as hydrogen source). Additionally, the catalytic activity of Cu2O/TiO2 remained efficient even after six reaction cycles.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Qianqian Zhou, Yanxin Chen, Haoyan Shi, Rui Chen, Minghao Ji, Kexian Li, Hailong Wang, Xia Jiang, Canzhong Lu
Summary: In this paper, a facile electrodeposition approach successfully synthesized the heterostructure of p-Cu2O and n-Cu2O, which has significantly enhanced the photoelectrochemical (PEC) CO2 reduction reaction (CO2RR) efficiency. This is due to the p/n heterojunction formed by the protective layer of n-Cu2O on the surface of p-Cu2O nanoparticles, which greatly improves the charge separation efficiency of photogenerated electron/hole pairs in p/n-Cu2O.
Article
Environmental Sciences
Xiaojiao Yu, Huanhuan Chen, Qinggong Ji, Yangyang Chen, Yuchen Wei, Ningning Zhao, Binghua Yao
Summary: A two-step electrochemical deposition technique was used to fabricate p-Cu2O/n-ZnO heterojunction thin films, and the influence of deposition potential on sample properties was investigated. The p-Cu2O/n-ZnO heterojunction showed enhanced photocatalytic performance with high carrier concentration and improved catalytic efficiency. The photocatalytic degradation experiments revealed the roles of positive hole and superoxide anion radical in norfloxacin molecule decomposition.
Article
Energy & Fuels
Xiangyi Wang, Yue Cao, Zhiliang Jin
Summary: In this study, n-type semiconductor Mn0.05Cd0.95S nanoparticles were closely attached to the surface of p-type semiconductor Cu2O nanocubes to form a Cu2O/Mn0.05Cd0.95S p-n heterojunction, leading to efficient visible-light photocatalytic hydrogen evolution with high photostability. This discovery demonstrates a facile method for constructing p-n heterojunctions for highly efficient photochemical applications.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Multidisciplinary Sciences
Fumiya Nagasawa, Makoto Takamura, Hiroshi Sekiguchi, Yoshinori Miyamae, Yoshiaki Oku, Ken Nakahara
Summary: Fluorescent defect centers in 4H silicon carbide p-n junction diodes were investigated by aluminum-ion implantation into an n-type bulk substrate without epitaxial growth. Electroluminescence originating from silicon-vacancy defects was observed, with prominent intensity within a wavelength range of 400-1100 nm after electron irradiation of 1x1018 cm-2 at 800 keV. The commonly observed D1 emission was suppressed in electroluminescence spectra, while detected in photoluminescence measurements alongside emission lines from silicon-vacancy defects.
SCIENTIFIC REPORTS
(2021)
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
Chemistry, Physical
Junfeng Yang, Hanyu Yang, Yanhui Dong, Hao Cui, Hang Sun, Shengyan Yin
Summary: Binary Cu2O/MTiO3 (M = Ca, Sr and Ba) p-n heterojunction composites were successfully designed and prepared using hydrothermal method and NaBH4 reduction treatment. The Cu2O/CaTiO3 samples exhibited the highest H2 production rate and improved photoelectric chemical performance compared to pure CaTiO3, thanks to the construction of p-n heterojunction which enhanced the separation and migration rates of photogenerated carrier pairs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Anita Trenczek-Zajac, Joanna Banas-Gac, Marta Radecka
Summary: A TiO2@Cu2O semiconductor heterostructure was obtained by electrochemical deposition of Cu2O onto TiO2 nanotubes, showing better photochemical response and properties than TiO2. SEM and Raman spectroscopy were used to determine the morphology and structural properties of the heterojunction. The n-n type heterostructure of TiO2@Cu2O was found to prevent the process of photocorrosion of copper(I) oxide in a TiO2-based heterostructure, and a new energy diagram for the system was proposed based on the analysis of Mott-Schottky plots and photoelectrochemical measurements.
