Article
Nanoscience & Nanotechnology
Jaewon Kim, Owen Kendall, Jiawen Ren, Billy J. Murdoch, Christopher F. McConville, Joel van Embden, Enrico Della Gaspera
Summary: This study successfully fabricated CuCrO2 p-type transparent electrodes with outstanding optical and electrical properties and tuned their properties through careful screening of deposition conditions.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
F. Veron, I Pasquet, Y. Thimont, A. Barnabe, Ph Tailhades
Summary: Laser annealing by a photolithography machine is interesting for enhancing the p-type transparent conductor properties of delafossite phases, and the prospect of local annealing according to selected patterns opens up exciting possibilities for fast and low-cost manufacturing of these transparent p-type semiconductors.
Article
Materials Science, Multidisciplinary
M. F. Al-Kuhaili
Summary: This study obtained conductive tin oxide thin films through extrinsic doping with tantalum, resulting in high transparency and electrical conductivity suitable for transparent conductor applications.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Chetan C. Singh, Shaibal K. Sarkar
Summary: P-type Mg-incorporated CuCrO2 and AgCrO2 delafossite thin films were prepared at low temperatures using plasma-assisted combustion synthesis methods, exhibiting improved electrical conductivity and optical transmittance upon magnesium incorporation. The presence of oxygen interstitials also plays a significant role in enhancing the p-type electrical conductivity of these thin films. Temperature-dependent electrical resistivity measurements indicated different hole transport processes in CuCrO2 and AgCrO2 films.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Akhmed K. Akhmedov, Aslan Kh. Abduev, Eldar K. Murliev, Victor V. Belyaev, Abil Sh. Asvarov
Summary: It is possible to fabricate indium zinc oxide (IZO) films with a wide range of optoelectronic properties by using different oxygen contents in the working gas during sputtering deposition. Additionally, high deposition temperature is not necessary to achieve excellent transparent electrode quality in the IZO films. By modulating the oxygen content in the working gas during RF sputtering, IZO-based multilayers were deposited, consisting of ultrathin IZO unit layers with high electron mobility alternating with layers characterized by high concentration of free electrons. Through optimizing the thicknesses of each unit layer, low-temperature 400 nm thick IZO multilayers with excellent transparent electrode quality were obtained, exhibiting low sheet resistance, high transmittance in the visible range, and a very flat multilayer surface.
Article
Nanoscience & Nanotechnology
Martando Rath, Moussa Mezhoud, Oualyd El Khaloufi, Oleg Lebedev, Julien Cardin, Christophe Labbe, Fabrice Gourbilleau, Vincent Polewczyk, Giovanni Vinai, Piero Torelli, Arnaud Fouchet, Adrian David, Wilfrid Prellier, Ulrike Luders
Summary: This study investigates the chemical stability of SrVO3 (SVO), a potential replacement for conventional ITO in the new generation of TCO materials. By subjecting the SVO thin films to heat treatments in the range of 150-250 degrees Celsius, the researchers are able to accelerate the natural aging process and observe changes in the structural, electrical, and optical properties. The results indicate surface oxidation at low annealing temperatures and the destruction of the perovskite phase at temperatures above 200 degrees Celsius. The goal of this study is to understand the thermal degradation and long-term stability issues of vanadate-based TCOs and identify technologically viable solutions for their application.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Alexander Axelevitch
Summary: Transparent conductive oxide (TCO) thin films, such as indium-tin oxide (ITO), are widely used in micro- and optoelectronics, with dynamic hot-probe measurement system being one method to extract the main parameters of the films. This method, demonstrated on commercial ITO films and ZnO:Al layers, can also be applied to other wide-bandgap semiconductors.
Article
Physics, Applied
Dung Van Hoang, Anh Tuan Thanh Pham, Truong Huu Nguyen, Hoa Thi Lai, Dai Cao Truong, Thu Bao Nguyen Le, Thuy Dieu Thi Ung, Masataka Ohtani, Vinh Cao Tran, Thang Bach Phan
Summary: This study investigates the control of microstructure orientation through material thickness variation to tailor the thermopower factor of CuCr0.85Mg0.15O2 films. The results demonstrate that in thicker films, the dominant (110)-preferred orientation and presence of copper vacancies increase the conductivity. Despite the significant increase in conductivity, the Seebeck coefficient remains unchanged within a wide range of film thickness. Consequently, the thermopower factor of CuCr0.85Mg0.15O2 films drastically increases with increasing film thickness, with the 2.0 μm-thick film reaching a value of 720 μW/mK(2) at 500°C, which outperforms bulk materials.
APPLIED PHYSICS LETTERS
(2022)
Review
Chemistry, Physical
Zhamatuofu Bai, Sheng-Chi Chen, Song-Sheng Lin, Qian Shi, Ying-Bo Lu, Shu-Mei Song, Hui Sun
Summary: This study provides a comprehensive understanding of the optoelectronic properties of CuCrO2, discussing its crystal structure, XRD spectrum, and advantages in optoelectronic devices. The study concludes that CuCrO2 exhibits best optoelectronic performance among delafossite materials and discusses band structure calculations and p-type conductivity analysis. Additionally, it highlights recent progress on intrinsic CuCrO2 and Mg/Ni doping CuCrO2, as well as prospects for future research directions.
SURFACES AND INTERFACES
(2021)
Article
Physics, Condensed Matter
Dung Van Hoang, Hanh Duc Thi Dinh, Truong Huu Nguyen, Anh Tuan Thanh Pham, Tu Uyen Doan Thi, Trang Thuy Thi Phan, Ke Huu Nguyen, Thang Bach Phan, Vinh Cao Tran
Summary: High-quality CuCr0.95Mg0.05O2 delafossite thin films were successfully grown using dc magnetron sputtering, and the electrical and structural properties of the films were found to be closely correlated, with the preferred-(110) orientation playing a crucial role in high electrical conductivity.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
Sreeram Sundaresh, Akash Hari Bharath, Kalpathy B. Sundaram
Summary: The deposition of CuCrO2 thin films using a dual-target RF magnetron sputtering technique and subsequent annealing resulted in significant changes in the electrical, optical, structural, and morphological properties. XRD and XPS analyses confirmed the presence of phase pure CuCrO2 and the oxidation state of Cu in the films. SEM analysis showed the promotion of nanocrystalline growth with increasing annealing temperature. Optical studies revealed a decrease in optical transmission and bandgap as the temperature increased. Transparent heterojunction diodes based on p-type CuCrO2 and n-type ITO showed promising electrical characteristics.
Article
Chemistry, Physical
Wissal Belayachi, Gerald Ferblantier, Thomas Fix, Guy Schmerber, Jean-Luc Rehspringer, Thomas Heiser, Abdelilah Slaoui, Mohammed Abd-Lefdil, Aziz Dinia
Summary: Transparent conducting oxides (TCOs) are essential for solar cells, and tin dioxide (SnO2) films, with their rich sources, low cost, and non-toxicity, are potential substitutes for the commonly used indium-doped tin oxide (ITO). SnO2 films deposited using radio frequency (RF)-magnetron sputtering exhibit high visible-light transmittance and excellent electrical properties, making them suitable for organic solar cells (OSCs) electrodes. Despite slightly lower power conversion efficiency compared to ITO, SnO2 TCO shows promise as a viable alternative.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Haixu Liu, Hui Li, Junlei Tao, Jia Liu, Jinzheng Yang, Junjie Li, Jianmin Song, Jie Ren, Min Wang, Shaopeng Yang, Xin Song, Yanfeng Wang
Summary: This study developed a preparation scheme for AlF3 and GaF3 co-doped ZnO thin films using magnetron sputtering. The theoretical calculations and experimental results showed that the prepared FAGZO films had high electron mobility, low resistivity, and wide spectrum transmission performance. Moreover, the application of FAGZO films in perovskite solar cells demonstrated improved photocurrent density and power conversion efficiency compared to the reference film.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Saheer Cheemadan, M. C. Santhosh Kumar
Summary: This study deposited CdO:ZnO composite thin films with varying compositions on glass substrates using RF magnetron sputtering. The optoelectronic characteristics of the films and their dependence on substrate temperature were investigated. The structural, electrical, morphological, and optical properties of the films were analyzed using various techniques. The results showed that all films had an average optical transmittance above 80% in the visible range, regardless of the deposition temperature and composition. The CdO:ZnO (70:30) composite thin films deposited at 200℃ exhibited the lowest electrical resistivity and a high carrier concentration. Increasing the substrate temperature from room temperature to 200℃ resulted in an increase in carrier mobility. The energy band gap values of the films were calculated based on the transmittance spectra.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Review
Biochemistry & Molecular Biology
Hong Yong Sohn, Arun Murali
Summary: This article reviews and summarizes recent work in this laboratory on the synthesis of advanced transparent conducting oxide nanopowders using plasma. The process involves selecting suitable precursors, injecting them into a non-transferred thermal plasma, vaporizing them, and forming nanosized oxide particles through vapor-phase reactions. The thermal plasma process shows great potential as an efficient technique for synthesizing oxide nanopowders.
Article
Materials Science, Multidisciplinary
Tao Zhu, Zanhong Deng, Xiaodong Fang, Weiwei Dong, Jingzhen Shao, Ruhua Tao, Shimao Wang
BULLETIN OF MATERIALS SCIENCE
(2016)
Article
Nanoscience & Nanotechnology
Bin Tong, Zanhong Deng, Bo Xu, Gang Meng, Jingzhen Shao, Hongyu Liu, Tiantian Dai, Xueyan Shan, Weiwei Dong, Shimao Wang, Shu Zhou, Ruhua Tao, Xiaodong Fang
ACS APPLIED MATERIALS & INTERFACES
(2018)
Article
Chemistry, Physical
Zanhong Deng, Gang Meng, Xiaodong Fang, Weiwei Dong, Jingzhen Shao, Shimao Wang, Bin Tong
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Chemistry, Inorganic & Nuclear
Zanhong Deng, Bin Tong, Gang Meng, Hongyu Liu, Tiantian Dai, Lingli Qi, Shimao Wang, Jingzhen Shao, Ruhua Tao, Xiaodong Fang
INORGANIC CHEMISTRY
(2019)
Article
Nanoscience & Nanotechnology
Tiantian Dai, Gang Meng, Zanhong Deng, Ying Chen, Hongyu Liu, Liang Li, Shimao Wang, Junqing Chang, Pengcheng Xu, Xinxin Li, Xiaodong Fang
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Engineering, Environmental
Junqing Chang, Zanhong Deng, Xiaodong Fang, Chaohao Hu, Lei Shi, Tiantian Dai, Meng Li, Shimao Wang, Gang Meng
Summary: In this study, a novel nanostructured material SBO/ZnO was proposed for selective detection of H2S at low temperature, exhibiting high response, low detection limit, good selectivity, and stability. The sensor is suitable for monitoring trace H2S pollutants in diverse workplaces.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Optics
Dandan Rong, Gang Meng, Xiaodong Fang, Libing You, Zanhong Deng
Summary: In this study, p-type delafossite AgAlO2 (AAO) nanoparticles were proposed as a novel sensitive coating material for the cladding modification of LPG to develop a high-sensitivity fiber-optic ammonia sensor. The LPG optical fiber sensor showed a linear sensitivity of 2.07 pm/ppm to ammonia from 25 ppm to 400 ppm at room temperature, with short response and recovery time, as well as high selectivity to ammonia.
Article
Chemistry, Multidisciplinary
Hongyu Liu, Gang Meng, Zanhong Deng, Kazuki Nagashima, Shimao Wang, Tiantian Dai, Liang Li, Takeshi Yanagida, Xiaodong Fang
Summary: This study demonstrates a method of using temperature modulation of a single MOS sensor to recognize BTX molecules, by applying a rectangular heating waveform to activate the redox reaction at specific gas/oxide interfaces. Through signal preprocessing and data analysis methods, the features of BTX molecules can be extracted to improve recognition accuracy and stability.
Article
Materials Science, Multidisciplinary
Meng Li, Hongyu Liu, Junqing Chang, Tiantian Dai, Kazuki Nagashima, Zanhong Deng, Takeshi Yanagida, Xiaodong Fang, Gang Meng
Summary: This study demonstrates that using a sensor array composed of NiO sensors for thermal modulation can improve the discrimination of different categories of gas molecules. The peak temperature of the temperature profile is crucial in distinguishing concentration differences induced by subtle variations in electrical responses.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Nanoscience & Nanotechnology
Ruofan Zhang, Zanhong Deng, Lei Shi, Mahesh Kumar, Junqing Chang, Shimao Wang, Xiaodong Fang, Wei Tong, Gang Meng
Summary: Recent advances in heterogeneous catalysts have shown that single atoms anchored on metal oxide nanostructures exhibit high catalyst efficiency, intriguing reactivity, and selectivity. This study successfully designed isolated Pt single atoms anchored on CuCrO2 using a combustion synthesis method, resulting in significantly enhanced H2S response characteristics and excellent selectivity.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Xiao Zhao, Shimao Wang, Fuwei Zhuge, Yanan Song, Toru Aoki, Weiwei Dong, Mengyu Fu, Gang Meng, Zanhong Deng, Ruhua Tao, Xiaodong Fang
Summary: By investigating the effects of hot-pressed temperature on CsPbBr3 wafers, the conditions for preparing high-quality CsPbBr3 wafers have been optimized, and the resulting planar-type photodetectors show an ultrasensitive weak light photoresponse.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Xueyan Shan, Shimao Wang, Mengyu Fu, Xiao Zhao, Toru Aoki, Volodymyr Gnatyuk, Zanhong Deng, Ruhua Tao, Xiaodong Fang, Gang Meng
Summary: This study proposes a non-contact approach based on excimer laser irradiation to precisely prepare a PbI2 passivation layer on the surface of perovskite films, resulting in a significant improvement in the performance of perovskite solar cells.
JOURNAL OF POWER SOURCES
(2023)
Article
Nanoscience & Nanotechnology
Longqing Mi, Zanhong Deng, Junqing Chang, Sunil Kumar, Meng Li, Ruofan Zhang, Dandan Rong, Mahesh Kumar, Shimao Wang, Yong He, Gang Meng
Summary: This study proposes a pulsed UV light modulation (PULM) photoactivation protocol, which allows the exploitation of nanomaterials for sensitively detecting trace toxic gas molecules. PULM enables the generation of surface reactive oxygen species and refreshes the surface of chemiresistors without the side effects of UV-induced desorption and decline of base resistance. PULM significantly improves the response rate to 20 ppb NO2 from 1.9 (continuous UV) to 131.1 (PULM UV-off) and reduces the limit of detection from 2.6 ppb (continuous UV) to 0.8 ppb (PULM) for a ZnO chemiresistor.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Longqing Mi, Zanhong Deng, Junqing Chang, Meng Li, Ruofan Zhang, Shimao Wang, Libing You, Xiaodong Fang, Yong He, Gang Meng
Summary: We demonstrated that the humidity tolerance of a ZnO chemiresistor can be significantly improved by H2O2 treatment. The H2O2-treated ZnO chemiresistor shows stable operation under a highly humid air background and the response to O3 can be further enhanced by pulsed UV light modulation.
ACS APPLIED NANO MATERIALS
(2023)
Article
Physics, Applied
Guoqing Zhou, Guoqiang Tang, Tian Li, Guoxing Pan, Zanhong Deng, Fapei Zhang
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2017)
