Article
Green & Sustainable Science & Technology
M. A. Olgar, A. O. Sarp, A. Seyhan, R. Zan
Summary: In this study, CZTS thin films were synthesized using a two-stage process with different annealing temperatures, resulting in samples with varying crystal structures. Selecting appropriate annealing temperatures can lead to purer crystal structures, showing potential for practical application in solar cells.
Article
Energy & Fuels
Ju-Guang Hu, Tong Wu, Muhammad Ishaq, Umar Farooq, Shuo Chen, Zhuang-Hao Zheng, Zheng-Hua Su, Xiao-Dong Lin, Ping Fan, Hong-Li Ma, Xiang-Hua Zhang, Guang-Xing Liang
Summary: The CZTS thin-film solar cell achieved a record power conversion efficiency of 6.62% through pulsed laser deposition and sulfurization process, attributed to its optimized structure and composition. This research provides a facile and robust preparation method for CZTS films with enhanced photovoltaic properties and increased efficiency.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Chemistry, Physical
S. Erkan, A. Yagmyrov, A. Altuntepe, R. Zan, M. A. Olgar
Summary: In this study, CZTS samples were produced on Mo and graphene/Mo coated glass substrates. The CZTS thin films were annealed in sulphur atmosphere using rapid thermal processing method. The results showed that using graphene as an inter-layer improved the crystalline quality and grain size of the CZTS films, leading to enhanced conversion efficiency of the solar cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Condensed Matter
Xin Liu, Xinyu Li, Xiang Li, Qiulian Li, Daoyong Zhang, Na Yu, Shurong Wang
Summary: Cu2SnS3 (CTS) thin films prepared by sulfurization exhibit good performance in solar cells, with the highest power conversion efficiency of 3.68%, as well as high short-circuit current density and peak external quantum efficiency.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Materials Science, Multidisciplinary
Wafaa Magdy, Ayaka Kanai, Esam T. El Shenawy, Sherif A. Khairy, Hussam H. Hassan, Mutsumi Sugiyama, Fawzy A. Mahmoud
Summary: Adjusting the sulfur content and amount of doping is a promising approach to fabricate high-performance thin film solar cells. This study investigated the effects of sulfur content and Sb doping on the physical and optical properties of Cu2SnS3 (CTS) thin films. The results showed that Sb doping resulted in larger grain size and improved conversion efficiency of the CTS solar cells.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Zheng Lu, Hu Zhou, Chao Ye, Shi Chen, Jinyan Ning, Mohammad Abdul Halim, Sardor Burkhanovich Donaev, Shenghao Wang
Summary: Iron pyrite is a promising material for photovoltaics due to its low cost, stability, non-toxicity, and abundance. Electrochemical deposition is a cost-effective method suitable for large-scale production of iron pyrite solar cells. Sulfurization is essential in synthesizing high-quality iron pyrite films for low-cost and large-scale fabrication of iron pyrite solar cells.
Article
Chemistry, Physical
V. D. Moreno-Regino, R. Castanedo-Perez, J. Marquez-Marin, G. Torres-Delgado
Summary: In this study, CZTS films were prepared by the low-cost technique of spray pyrolysis, and their properties were investigated after a novel thermal treatment. The results showed that the crystalline quality and electrical resistivity of the CZTS films were significantly improved after the treatment, without substantial loss of sulfur concentration. The CZTS films prepared at a temperature of 400 degrees Celsius exhibited the best properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Neslihan Akcay, Valery F. Gremenok, Yunus Ozen, Konstantin P. Buskis, Ellen P. Zaretskaya, Suleyman Ozcelik
Summary: A two-step process was used to prepare Cu2SnS3 films in this study, and the sulfurization time was found to significantly affect the films' structural, morphological, optical, and electrical characteristics. The films were found to exhibit two structural polymorphs of Cu2SnS3. The fabrication of devices using In2S3/Cu2SnS3 stacks showed slightly enhanced efficiency with annealing.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Hassan Zare Asl, Seyed Mohammad Rozati
Summary: CuO:In2O3 nanocomposite thin films were successfully prepared by adding different weight percentages of indium chloride. The addition of In2O3 considerably improved the conductivity and electrochemical performance of the films, but excessive growth of In2O3 could limit ion storage.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Energy & Fuels
Raju Nandi, Pravin S. Pawar, KrishnaRao Eswar Neerugatti, Jae Yu Cho, Seongheon Kim, Seong Ho Cho, Yun Seog Lee, Jaeyeong Heo
Summary: The study reports the highest cell efficiency and short-circuit current density for α-SnSe thin-film solar cells grown via vapor-transport-deposition. It shows that the grain size and surface roughness greatly influence the shunt properties of the device, with significantly large shunt losses detected in cases of both small and extremely large grains.
Article
Chemistry, Multidisciplinary
Minghao Zhao, Junsheng Yu, Lijuan Fu, Youwei Guan, Hua Tang, Lu Li, Jiang Cheng
Summary: Selenylation significantly improved the efficiency of CuSbS2 solar cells by effectively doping Se into the lattice and reducing carrier recombination centers. The substitution rate of Se was very high (>39%), and the selenized device showed a much higher efficiency of 0.90% compared to the simply annealed device (0.46%), demonstrating the promising potential of this technique.
Article
Chemistry, Physical
Xuerui Han, Chengwu Shi, Yuye Huang, Kai Lv, Wangchao Chen, Fuling Guo, Yanqing Wang
Summary: CdS thin films were prepared by chemical bath deposition (CBD), and Sb2S3-y Se (y) thin films were prepared by a hydrothermal method. The quality of CdS thin films as the electron transport layer was evaluated in solar cells with the architecture of FTO/CdS/Sb2S3-y Se (y)/spiro-OMeTAD/Au. A precise preparation strategy, involving adjusting the thickness of CdS thin films prepared by CBD and changing the concentration of the CdCl2 methanol solution in the post-treatment process, was proposed for the first time. The strategy allowed for the successful production of a compact and full-coverage CdS thin film with a thickness of 40 nm and achieved an optimal power conversion efficiency of 8.46%.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Physics, Condensed Matter
L. Boulkaddat, A. Soussi, H. Najih, K. Abouabassi, A. Ait Hssi, N. Labchir, A. Elfanaoui, R. Markazi, K. Bouabid, A. Ihlal
Summary: Absorbent CuInS2 layers were successfully prepared using an electrodeposition technique, and the effects of sulfurization time on the properties of samples were investigated. The resulting films exhibited a polycrystalline chalcopyrite structure and showed good optical performance.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Physics, Applied
Chao Chen, Xinxing Liu, Kanghua Li, Shuaicheng Lu, Siyu Wang, Sen Li, Yue Lu, Jungang He, Jiajia Zheng, Xuetian Lin, Jiang Tang
Summary: By applying ZnxCd1-xS to tune the interface band alignment between CdS and Sb2Se3, the efficiency of Sb2Se3 thin-film solar cells can be significantly improved.
APPLIED PHYSICS LETTERS
(2021)
Article
Energy & Fuels
M. Okil, Ahmed Shaker, Ibrahim S. Ahmed, Tarek M. Abdolkader, Marwa S. Salem
Summary: This study proposes a two-terminal monolithic Sb2S3/Si thin film tandem solar cell structure and investigates it through TCAD simulation. By optimizing the structure of the top sub-cell and the bandgap of the bottom thin-film silicon cell, a conversion efficiency of 10.10% is achieved. Further optimization of various parameters improves the efficiency of the tandem cell to 19.51%.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Materials Science, Multidisciplinary
Sun Kyung Hwang, Ik Jae Park, Se Won Seo, Jae Hyun Park, So Jeong Park, Jin Young Kim
Summary: We demonstrate an efficient monolithic two-terminal perovskite/CZTSSe tandem solar cell by reducing the surface roughness of the electrochemically deposited CZTSSe bottom cell. The perovskite top cell with a bandgap of 1.65 eV is prepared on the flattened CZTSSe bottom cell, resulting in efficient perovskite/CZTSSe tandem solar cells. The best performing tandem device exhibits a high conversion efficiency of 17.5% without the hysteresis effect.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Hyun Woo Lim, Jae Hyun Park, Bingyi Yan, Jin Young Kim, Chan Woo Lee
Summary: In this study, a new type of titanium foam electrode with core/shell-structured mixed metal oxide nanoparticles was demonstrated to achieve almost zero polarization for the chlorine evolution reaction in chlor-alkali electrolysis. The electrode showed significantly lower noble metal usage compared to commercial electrodes and exhibited fast charge-transfer kinetics and high mass transport rates, leading to excellent performance in chlorine and hydrogen gas evolution reactions.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Analytical
Yongteng Qian, Zhiyi Lyu, Qianwen Zhang, Tae Hyeong Lee, Tae Kyu Kang, Minkyun Sohn, Lin Shen, Dong Hwan Kim, Dae Joon Kang
Summary: In this study, flower-shaped MoS2/graphene heterostructures were used as electrode materials on flexible substrates to overcome the limitations of low energy density and poor durability of MoS2. The results showed exceptional capacitance of 853 F g(-1) at 1.0 A g(-1) in three-electrode measurements, and 208 F g(-1) at 0.5 A g(-1) with long-term cyclic durability in asymmetric supercapacitor measurements. Nearly 86.5% of the electrochemical capacitance was retained after 10,000 cycles at 0.5 A g(-1). Moreover, a remarkable energy density of 65 Wh kg(-1) at a power density of 0.33 kW kg(-1) was obtained. The MoS2/Gr heterostructure composites have great potential for the development of advanced energy storage devices.
Article
Nanoscience & Nanotechnology
Jian Cheng, In Choi, Wooyeon Kim, Hui Li, Bonkee Koo, Min Jae Ko
Summary: Perovskite-based tandem solar cells with a 2.0 eV band gap were successfully deposited using acetic acid and isopropanol as solvents. The formation of acetate anions in situ effectively stabilized the intrinsic defects in the perovskite films, improving their phase stability. This strategy led to a high open-circuit voltage (1.325V) and a power conversion efficiency of 10.62%, which is close to the state-of-the-art for perovskite solar cells with a 2.0 eV band gap.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Energy & Fuels
Min Kyung Lee, Sungkyun Choi, Hoonkee Park, Tae Hyung Lee, Sol A. Lee, Jin Wook Yang, Su Geun Ji, Woo Seok Cheon, Sang Hyun Ahn, Soo Young Kim, Mohammadreza Shokouhimehr, Jin Young Kim, Ho Won Jang
Summary: A novel nickel-based 2D MOF was synthesized and demonstrated excellent electrocatalytic performance for the oxygen evolution reaction. The resulting Ni-NDC@NF exhibited low overpotential, small Tafel slope, high faradaic efficiency, and long-term stability. Furthermore, the electrodeposition of NiMo alloy on Ni-NDC@NF enhanced the hydrogen evolution reaction activity, enabling efficient overall water splitting.
Article
Chemistry, Physical
Yeo Jin Choi, Sung Yeon Lim, Jae Hyun Park, Su Geun Ji, Jin Young Kim
Summary: This paper presents a study on the use of a highly volatile solvent mixture to prevent chemical degradation of PVSK middle cell and to improve the performance of the PVSK top cell. The addition of urea enhances the crystallinity and light-absorbing capability of the PVSK top cell, resulting in an increase in conversion efficiency from 6.4% to 13.9%. With the aid of the new solvent and urea additive, the PVSK/PVSK/Si 3J tandems achieve a record-high efficiency of 22.23%.
ACS ENERGY LETTERS
(2023)
Review
Nanoscience & Nanotechnology
Ik Jae Park, Hyo Kyung An, Yuna Chang, Jin Young Kim
Summary: With metal halide perovskite-based solar cells achieving a photovoltaic performance of approximately 26% and approaching the theoretical Shockley-Queisser limit, researchers are now focusing on tandem solar cells that use perovskite materials to achieve high efficiency. However, interfacial issues and difficulties in fabricating solution-processed perovskite top cells pose challenges for achieving high efficiency and stability. This paper provides a summary and review of the fundamentals and strategies to overcome these issues in tandem solar cells.
Article
Nanoscience & Nanotechnology
Mohamed R. Elmasry, Samy M. Shaban, Ahmed Y. Elbalaawy, Eslam Hafez, Jihoon Shin, Soo-Yeon Cho, Dong-Hwan Kim
Summary: In this study, a dual-signal nanosensor was designed for rapid and accurate urea detection using fluorescent carbon dot nanosensors and plasmonic silver nanoparticles. The sensor showed low detection limits and reliable performance in real urine samples.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Boncheol Ku, Bonkee Koo, Wooyeon Kim, Younghoon Kim, Yu-Rim Jeon, Min Jae Ko, Changhwan Choi
Summary: CsPbX3 (X = I, Br, or Cl) perovskite materials with versatile and excellent photoelectric properties have attracted great interest in various devices. However, their application is hindered by the unstable crystalline phase at room temperature. To address this issue, a stable CsPbI3 perovskite quantum dots (CsPbI3-PQDs) thin film was fabricated using in-situ ligand exchange layer-by-layer self-assembly (LbL SA). These thin films showed not only nano-scale thickness control but also tunable electrical properties. A photonic synapse was fabricated on fluorine-doped tin oxide (FTO) substrate using CsPbI3-PQD, exhibiting photo-sensitive current-voltage characteristics and emulating essential synaptic behaviors induced by photonic stimulus. Additionally, a CsPbI3-PQD/a-IGZO heterojunction synaptic device was fabricated, demonstrating improved synaptic behaviors under various visible stimuli.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Hashikaa Rajan, Sengeni Anantharaj, Jin-Kuk Kim, Min Jae Ko, Sung Chul Yi
Summary: The major issue with alkaline hydrogen evolution reaction (HER) is the poor kinetics resulting from water dissociation and discharge of protons. In this study, we developed a trimetallic catalyst (CoMoRu/CC) to overcome these issues. The Co component promoted water dissociation, while the Ru component efficiently discharged protons, resulting in H2 evolution. The Mo component assisted in the optimal bonding of H-ad to the catalytic sites and prevented Ru from getting poisoned.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Review
Engineering, Electrical & Electronic
Sangmoon Han, Yuan Meng, Zhihao Xu, Justin S. Kim, Yimeng Li, Il-Pyo Roh, Hyojung Ahn, Dong-Hwan Kim, Sang-Hoon Bae
Summary: Epitaxy of single-crystalline materials laid the foundation for electronics, but limited applications were explored due to covalent bonding of epilayers to substrates. The development of layer transfer techniques has provided another approach by producing freestanding membranes. This review comprehensively catalogs recent advances in freestanding-membrane-based electronics and highlights their unique advantages, challenges, and perspectives.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Mi Gyoung Lee, Jin Wook Yang, Ik Jae Park, Tae Hyung Lee, Hoonkee Park, Woo Seok Cheon, Sol A. Lee, Hyungsoo Lee, Su Geun Ji, Jun Min Suh, Jooho Moon, Jin Young Kim, Ho Won Jang
Summary: The introduction of indium oxide nanorods as an electron transport layer enhances the photoelectrochemical performance of bismuth vanadate. A tannin-nickel-iron complex is used as an oxygen evolution catalyst to accelerate the reaction kinetics. The fabricated TANF/BiVO4/In2O3 NR photoanode exhibits improved photoactivity with high photocurrent densities.
Article
Chemistry, Physical
Daehan Kim, Majid Safdari, Seung Won Lee, Cheng Liu, Yi Yang, Seok Daniel Namgung, Edward H. Sargent, Mark C. Hersam, Dong-Hwan Kim, Mercouri G. Kanatzidis
Summary: This study investigated the use of hollow perovskite architectures to enhance the photostability of mixed halide wide-bandgap perovskites. By analyzing the properties of hollow perovskite thin films, it was found that the incorporation of hollow structures improved photostability compared to non-hollow samples. The inclusion of enI(2) further reduced ionic conductivity and trap density. While the initial efficiency of solar cells decreased with increasing enI2 concentration, the open-circuit voltage value increased, potentially due to the enhancement of the band gap. Overall, hollow perovskite architectures show great potential in enhancing the photostability of mixed halide perovskites.
ACS ENERGY LETTERS
(2023)
Review
Polymer Science
Kiwon Choi, Ahyeon Noh, Jinsil Kim, Pyong Hwa Hong, Min Jae Ko, Sung Woo Hong
Summary: Self-healing polymeric materials, which can autonomously restore damages, are at the forefront of sustainable materials research and play a crucial role in mitigating plastic waste. Historical research focused on extrinsic self-healing systems, while recent advancements have shifted towards intrinsic self-healing systems.
Article
Biochemical Research Methods
Mohamed H. Mostafa, Samy M. Shaban, Eslam Hafez, Jihoon Shin, Dong-Hwan Kim
Summary: This research introduces a novel multichromatic sensor for the detection of gallic acid (GA), which utilizes the controlled growth of silver nanoparticles on the surface of gold nanobipyramids. The sensor offers a wide dynamic range and a low detection limit, and has been successfully applied for GA detection in black and green tea, showing high recovery efficiency and potential for food quality control applications.
