Article
Electrochemistry
Akash S. Rasal, Chiranjeevi Korupalli, Girum Getachew, Tzung-Han Chou, Ting-Ying Lee, Anil V. Ghule, Jia-Yaw Chang
Summary: The study introduces novel nature-inspired biopolymer polydopamine (PDA)-based additives to polysulfide electrolytes, achieving efficient and stable quantum dot-sensitized solar cells (QDSSCs). The PDA-based additives not only boost conversion efficiencies but also greatly enhance device performance stability, possibly due to the antioxidative property of PDA neutralizing light-induced radicals.
ELECTROCHIMICA ACTA
(2021)
Article
Energy & Fuels
Negin Beiraghdar, Hossein Dehghani, Malihe Afrooz
Summary: A low-cost and straightforward method was reported for modifying polysulfide electrolyte using amine additives to enhance CdS/CdSe QDSSCs performance. The addition of thiourea in the electrolyte solution played a crucial role in forming a molecular complex, increasing electron lifetime, J(SC), and improving PCE value.
Article
Chemistry, Physical
Tingting Xu, Zhi Wan, Hebing Tang, Chenhui Zhao, Shaoshen Lv, Yonghua Chen, Lixin Chen, Qiquan Qiao, Wei Huang
Summary: Additive engineering using carbon quantum dots as additives is an effective method to improve the performance of perovskite solar cells, with A-CQD having the most significant impact, increasing the PCE to 13.28% and showing good long-term stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Polymer Science
Ravindra Kumar Gupta, Hamid Shaikh, Ahamad Imran, Idriss Bedja, Abrar Fahad Ajaj, Abdullah Saleh Aldwayyan
Summary: The solar cell is considered a safe mode for electricity generation. This paper reports the use of solid redox mediators as alternatives to iodide/triiodide in dye-sensitized solar cells, achieving good performance in thermal stability and conductivity compared to liquid electrolytes.
Review
Chemistry, Physical
Akash S. Rasal, Sudesh Yadav, Anil A. Kashale, Ali Altaee, Jia-Yaw Chang
Summary: This review discusses the factors influencing the performance stability of QDSSCs and provides insights into the mechanisms causing degraded performances. It also presents cutting-edge strategies for improving the overall performance stability of QDSSCs.
Article
Materials Science, Multidisciplinary
Caixia Li, Samira Agbolaghi
Summary: The construction of supramolecules using P3HT chains crystallized onto CQD and GQD nanoparticles improved the efficiency and stability of perovskite solar cells.
ORGANIC ELECTRONICS
(2022)
Article
Chemistry, Physical
Miguel Albaladejo-Siguan, David Becker-Koch, Elizabeth C. Baird, Yvonne J. Hofstetter, Ben P. Carwithen, Anton Kirch, Sebastian Reineke, Artem A. Bakulin, Fabian Paulus, Yana Vaynzof
Summary: Light-harvesting devices made from lead sulfide quantum dot absorbers have promising applications in third-generation photovoltaics. Passivating the quantum dot surfaces and managing the excess lead halide can improve device performance and stability.
ADVANCED ENERGY MATERIALS
(2022)
Article
Energy & Fuels
Jingjing Wang, Junwei Liu, Kangkang Zhou, Kaihu Xian, Qingchun Qi, Wenchao Zhao, Yu Chen, Long Ye
Summary: This study explores the impact of solvents on organic semiconductor materials in hybrid solar cells and provides guidelines for solvent screening, along with the discovery of excellent material processing methods that result in high photovoltaic performance.
Article
Engineering, Environmental
Xianjun Weng, Yanyang Qin, Xinyu Da, Yuanjun Zhao, Xuetian Deng, Bo Wen, Manying Cui, Xiangkai Yin, Yaqiong Su, Jiangxuan Song, Shujiang Ding, Xiaofei Hu, Guoxin Gao, Xuefei Li
Summary: A novel bifunctional electrolyte additive, NFSI, was developed to greatly improve the cyclability and safety of lithium metal batteries. NFSI preferentially reacts with the lithium anode to form a stable solid electrolyte interphase (SEI) film, inhibiting electrolyte consumption and lithium dendrite growth. Additionally, NFSI is preferentially oxidized to form a conductive thin film layer. Li||Li cells containing 0.1 M NFSI exhibit excellent cycle stability and Li||Cu cells show high Coulombic efficiency.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Jingxuan Chen, Donglin Jia, Rongshan Zhuang, Yong Hua, Xiaoliang Zhang
Summary: A highly orientated PQD solid is achieved by precursor engineering and chemical stripping treatment. The highly ordered PQDs promote charge-carrier transport and reduce nonradiative recombination by decreasing surface trap states. This study provides a feasible approach for constructing high-performance optoelectronic devices.
ADVANCED MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Yaling Liu, John Keil, Vivian E. Ferry, Uwe R. Kortshagen
Summary: Greenhouses provide a controlled environment for plant growth and offer resilience to droughts and extreme weather. Luminescent solar concentrators (LSCs) have the potential to reduce greenhouse energy demand by generating clean electricity and transmitting enough light for plant growth.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Chemistry, Multidisciplinary
Sisi Liu, Chongjian Zhang, Shuangyuan Li, Yong Xia, Kang Wang, Kao Xiong, Haodong Tang, Linyuan Lian, Xinxing Liu, Ming-Yu Li, Manlin Tan, Liang Gao, Guangda Niu, Huan Liu, Haisheng Song, Daoli Zhang, Jianbo Gao, Xinzheng Lan, Kai Wang, Xiao Wei Sun, Ye Yang, Jiang Tang, Jianbing Zhang
Summary: By epitaxially coating a thin PbS shell over the PbSe QDs and in situ halide passivation, a strategy to decouple the restrictive relation between V-OC and J(SC) in QD IR photovoltaics is developed. This approach allows for excellent trap-state control and outstanding performance under filtered solar illumination, providing a new route to overcome the trade-off between V-OC and J(SC) limited by the photoactive layer with a given bandgap.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Energy & Fuels
T. Archana, S. Sreelekshmi, G. Subashini, A. Nirmala Grace, M. Arivanandhan, R. Jayavel
Summary: The study investigated the use of graphene quantum dots as a passivating layer for cadmium sulfide quantum dot-sensitized solar cells, which significantly enhanced the photoconversion efficiency of the QDSSCs.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Xingyu Chen, Zhekun Xiong, Meijie Chen, Ping Zhou
Summary: In this study, ultra-stable carbon quantum dot (CQD) nanofluids were prepared by microwave heating polyethylene glycol 200 (PEG-200), showing excellent stability and repeatability over a long period and at working temperature. The solar thermal conversion efficiency can be significantly enhanced by changing the microwave duration.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Chemistry, Multidisciplinary
Stefan W. Tabernig, Lin Yuan, Andrea Cordaro, Zhi Li Teh, Yijun Gao, Robert J. Patterson, Andreas Pusch, Shujuan Huang, Albert Polman
Summary: We have designed an optically resonant bulk heterojunction solar cell to study the optoelectronic properties of nanostructured p-n junctions. By optimizing the nanoscale pattern, we were able to improve the efficiency of the solar cell by enhancing the absorption and charge-carrier extraction behavior. Our experiments and simulations showed significant improvement in infrared response and current gain in the patterned solar cell compared to the planar reference, demonstrating the importance of nanostructured geometries in enhancing solar cell performance.
Article
Chemistry, Physical
Sang Youn Chae, Eun Duck Park
Summary: The study reports the unexpectedly improved photoelectrochemical activity and stability of the Ta3N5 photoelectrode in acidic electrolytes. It reveals the oxidation mechanism of Ta3N5 surface as transpassivation, with suppressed surface oxidation rate under acidic pH conditions. The less formation of the passive layer at the Ta3N5 surface leads to improved photoelectrochemical activity and stability.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Sang Youn Chae, Noyoung Yoon, Oh Shim Joo, Eun Duck Park
Summary: The electrochemical activation of CuInS2/MoSx for photoelectrochemical H-2 production was investigated using in operando Raman spectroscopy for the first time. The activation process resulted in the transformation of metallic MoSx to semiconducting MoSx, enhancing charge carrier transfer between CuInS2 and MoSx. Ex situ X-ray photoelectron spectroscopy and Raman spectroscopy indicated the presence of MoO3 after activation, but in operando Raman spectroscopy provided insight into the intermediate steps of the process that contradicted these results.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Songwoung Hong, Woo Lee, Yun Jeong Hwang, Seungwoo Song, Seungwook Choi, Hyun Rhu, Jeong Hyun Shim, Ansoon Kim
Summary: To prevent photocorrosion, a thick TiO2 film with electrical leakage was deposited onto an n-Si photoanode surface. Modulating the defect density of the TiOx film enhanced hole transport and water-splitting activity. The photoanode with optimal defect density retained 85% of the initial current density after 100 hours.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Sang Youn Chae, Noyoung Yoon, Eun Duck Park, Oh Shim Joo
Summary: In this study, the photoelectrochemical activity of CuInS2 photocathodes was investigated after sequential surface modification with a-MoSx, Pt, or Ru. The results showed that a Ru-modified CuInS2/a-MoSx photocathode exhibited higher photoelectrochemical activities compared to a Pt-modified one. The high activity of the Ru modification was found to be due to the more suitable energy level of Ru on the photocathode, which improved the electron transfer and carrier lifetime during photoelectrochemical reaction.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Adeel Mehmood, Sang Youn Chae, Eun Duck Park
Summary: In this study, Rh-(C)i/HCO(3)(-)hetero-/homogenous dual co-catalysts were introduced on the BiVO4 surface to improve its water oxidation performance. This dual co-catalyst system enhanced the charge injection efficiency and stabilized the photoelectrochemical water oxidation kinetics of BiVO4. BiVO4 decorated with Rh-C-i/HCO3- exhibited a higher photocurrent (2.011 mA.cm(-2)) at 1.23 VRHE compared to bare BiVO4 (1.217 mA.cm(-2)).
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Noyoung Yoon, Oh Shim Joo, Sang Youn Chae, Eun Duck Park
Summary: This review summarizes studies on CuInS2-based PEC cells for H-2 production. It explores the theoretical background of PEC H-2 evolution and properties of the CuInS2 semiconductor. Strategies to improve CuInS2 photoelectrodes, such as synthesis methods, nanostructure development, heterojunction construction, and cocatalyst design, are examined.
Article
Chemistry, Multidisciplinary
Si Young Lee, Jimin Kim, Gwangsu Bak, Eunchong Lee, Dayeon Kim, Suhwan Yoo, Jiwon Kim, Hyewon Yun, Yun Jeong Hwang
Summary: In this study, the effect of cations on *CO intermediates on the Cu(OH)(2)-derived catalyst was directly observed in real-time. Different sensitivities to the cation-induced field were found for two *CO intermediates, with *COHFB being the dominant active species. Furthermore, a decrease in the hydrated cation size promoted C-C coupling and suppressed C1 product formation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
Jiwon Kim, Jae Hyung Kim, Cheoulwoo Oh, Hyewon Yun, Eunchong Lee, Hyung-Suk Oh, Jong Hyeok Park, Yun Jeong Hwang
Summary: An electro-assisted approach using acid-treated carbon electrocatalyst and in-situ cathodically generated reactive oxygen species is proposed for the partial oxidation of methane at ambient temperature and pressure. Reactive oxygen species activate methane and methanol, leading to selective methane partial oxidation. This study presents a method for the electrochemically assisted partial oxidation of methane to produce liquid oxygenate, HCOOH, selectively.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Hyewon Yun, Woong Choi, Dongwoo Shin, Hyung-Suk Oh, Yun Jeong Hwang
Summary: Tailoring catalyst performance in zero-gap MEA electrolyzers is crucial. However, few studies have directly focused on MEA systems combined with operando techniques. This study demonstrates improved catalytic performance of AuAg bimetallic catalyst by adjusting the atomic arrangement and extrinsic properties. The catalyst achieved high CO selectivity and CO partial current density and mass activity through proper adjustment of the carbon support.
Article
Chemistry, Physical
Chaeeun Lim, Dongkyu Kim, Mingyun Kim, Hyeju Yun, Dongwoo Shin, Yun Jeong Hwang, Hyeyoung Shin, Kijung Yong
Summary: In this study, a sulfur-derived solid-electrolyte interface (SEI) was introduced to enhance the stability and energy efficiency of Li-mediated nitrogen reduction reaction (Li-NRR). By engineering the physical structure of SEI, the ion conductivity and electron insulation properties were improved, leading to better Li plating uniformity and reduced electrolyte decomposition. The introduction of sulfur maintained a steady cell potential over 20 h, significantly enhancing energy efficiency.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Eunchong Lee, Jae Hyung Kim, Juhyung Choi, Yewon Hong, Dongwoo Shin, Hyewon Yun, Jimin Kim, Gwangsu Bak, Seongin Hong, Yun Jeong Hwang
Summary: In this study, the electrochemical oxidation reaction of furfural to produce maleic acid was investigated. It was found that doping lead oxide with bismuth effectively tuned the activity for the oxidation reaction and increased the selectivity for maleic acid production. The addition of bismuth suppressed the overoxidation of maleic acid to carbon dioxide. These results suggest that mixed metal oxides can be utilized to adjust the oxidation activity and enhance selective electrosynthesis from biomass conversion.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Amjad Khan, Gul Rahman, Anwar ul Haq Ali Shah, Sang Youn Chae, Shabeer Ahmad Mian
Summary: A cost-effective, single-step chemical route was used to grow hierarchical, multidimensional structures of nickel sulfide (NixSy) on a stainless steel substrate (SS). The crystallinity and surface morphology of the deposited material were strongly influenced by the growth temperature. The NixSy/SS electrode prepared at 100°C demonstrated excellent energy storage performance due to its 3D web-like morphology and achieved a specific capacity of 14 mA h g(-1), energy density of 8.9 Wh kg(-1), and power density of 506 W kg(-1).
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Younghyun Chae, Kyeongsu Kim, Hyewon Yun, Dongjin Kim, Wonsang Jung, Yun Jeong Hwang, Ung Lee, Dong Ki Lee, Byoung Koun Min, Woong Choi, Da Hye Won
Summary: The study investigates the impact of substrate on the performance of the electrochemical CO2 reduction reaction. It reveals that a porous carbon paper substrate facilitates CO2 supply and diffusion, leading to higher efficiency in CO2RR.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Guocheng Deng, Hyewon Yun, Megalamane S. Bootharaju, Fang Sun, Kangjae Lee, Xiaolin Liu, Seungwoo Yoo, Qing Tang, Yun Jeong Hwang, Taeghwan Hyeon
Summary: Studying the atomistic synergistic effects of nanoalloys on the electrocatalytic CO2 reduction reaction is crucial, but determining the atomic-level structure of appropriate analogues is challenging. In this study, a one-pot synthesis and structure characterization of an AuCu nanoalloy cluster catalyst were reported, which provided insights into the atomistic synergistic effects of Au and Cu on the reaction. The results showed that the AuCu nanoalloy exhibited excellent catalytic performance in the CO2 reduction reaction, with higher CO Faradaic efficiency and CO partial current density compared to the closest monometal analogue.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Suhyun Lee, Woong Choi, Jae Hyung Kim, Sohyeon Park, Yun Jeong Hwang, Jonggeol Na
Summary: This study evaluates the economic and environmental potential of direct electrochemical conversion of captured CO2 technology through techno-economic analysis and life cycle assessment. The results indicate that the technology has good economic potential if developed to the same level as the conventional CO2 reduction reaction process. Moreover, the environmental impact of the technology is positive, especially when using renewable electricity.
