Article
Chemistry, Physical
Bhanumathi Nagarajan, C. D. Athrey, Ramachandran Elumalai, Sudakar Chandran, Dhamodharan Raghavachari
Summary: The study focuses on the use of naphthalimide as an auxiliary acceptor in PTz-based dyes for DSSC applications. Two new organic dyes were synthesized with N-alkylated phenothiazine core and electron acceptor incorporation, showing optimal efficiency in DSSCs with iodide/triiodide electrolyte.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Chemistry, Applied
Ihssene Ouared, Maammar Rekis, Mohamed Trari
Summary: In this study, six new organic dyes were investigated using density functional theory (DFT). The theoretical photovoltaic properties indicated that the overall yield of the solar cell could be remarkably improved with the designed dyes, making them potential candidates as photosensitizers for dye sensitized solar cells (DSSCs). The dye bearing dioxythiophene linker showed the highest absorption maxima among the investigated dyes.
Article
Chemistry, Multidisciplinary
Peijin Zheng, Jian Xu, Fei Peng, Shengming Peng, Junxu Liao, Hongbin Zhao, Ledong Li, Xiangyan Zeng, Heyu Yu
Summary: The dye BT5, with a carbazole-containing triarylamine as the electron-donating unit, shows better photovoltaic performance, broader absorption spectrum, and higher molar extinction coefficient in DSCs compared to BT4 and BT6. Incorporating the BT unit into the dye backbone can lead to a pronounced electron transfer effect, affecting the absorption bands, Stokes shifts, and overall power conversion efficiency of DSCs.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Applied
Yongjie Ding, Jianhua Li, Shuaishuai Liu, Yanfang Tan, Kaihang Shi, Yunfei Jiao, Baoxiu Mi, Wenjuan Xu, Zhiqiang Gao
Summary: Two new phenothiazine dyes CBPTZ-BTD1 and CBPTZ-BTD2 were designed and synthesized in this work, with CBPTZ-BTD2 showing higher dye loading and strengthened ICT effect compared to CBPTZ-BTD1, resulting in better photovoltaic performance.
Article
Chemistry, Physical
Yunfei Jiao, Shuaishuai Liu, Zhongjin Shen, Le Mao, Yongjie Ding, Dan Ren, Felix Thomas Eickemeyer, Lukas Pfeifer, Dapeng Cao, Wenjuan Xu, Juan Song, Baoxiu Mi, Zhiqiang Gao, Shaik M. Zakeeruddin, Wei Huang, Michael Gratzel
Summary: Heteroaromatic units are commonly used as pi-spacers for sensitizers in dye-sensitized solar cells. The type of pi-spacer strongly influences the solar to electric power conversion efficiency of organic dyes, with electron-rich pi-spacers leading to higher efficiency. Molecular engineering plays a crucial role in developing high efficiency organic dyes for DSSCs.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Physical
Sylwia Zimosz, Aneta Slodek, Pawel Gnida, Adam Glinka, Marcin Ziolek, Dawid Zych, Agnieszka Katarzyna, Marharyta Vasylieva, Ewa Schab-Balcerzak
Summary: This study synthesized two compounds with an N-octyl phenothia-zine core substituted at C(7) position via a triple bond with imidazole-containing butyl or dodecyl chains. Photophysical and electrochemical studies were conducted to investigate their potential application in dye-sensitized solar cells. The synthesized dyes exhibited similar absorption profiles and high light-harvesting efficiency. Electrochemical measurements revealed their ability for electron injection and regeneration. DSSCs sensitized with the phenothiazine derivatives showed improved device performance, regardless of TiO2 thickness or electrolyte type.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Selvam Prabu, Thamodharan Viswanathan, Ezhumalai David, Sivanadanam Jagadeeswari, Nallasamy Palanisami
Summary: A new set of D-D'-p-p based dyes Fc-(OCH3-Ph)C=CH-CH=CN-R{R=COOH (1) and C6H4-COOH (2)} were synthesized and characterized for DSSC applications. The dyes showed stable thermal properties and efficient charge separation through intramolecular charge transfer. The addition of CDCA as a co-adsorbent improved the photovoltaic performance of the dyes, especially for dye 2 with additional p-linkers and acceptor unit.
Article
Chemistry, Physical
Shahnaz Ahmed, Smiti Rani Bora, Tridip Chutia, Dhruba Jyoti Kalita
Summary: A series of dyes with the D-pi-A architecture have been designed and studied for dye sensitized solar cells. Density functional theory and time-dependent density functional theory methods were used to investigate the structural, electronic, and photochemical properties of these dyes. The study revealed that the unsubstituted dye PTZ-BTZ has the lowest value of Delta(H-L) and attachment of the -NO2 group at the acceptor unit lowers the Delta(H-L) values of all the dye molecules.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Gebremariam Zebene Wubie, Man-Ning Lu, Mekonnen Abebayehu Desta, Hulugirgesh Degefu Weldekirstos, Mandy M. Lee, Wen-Ti Wu, Sie-Rong Li, Tzu-Chien Wei, Shih-Sheng Sun
Summary: By systematically choosing electron-donating and -accepting groups, as well as engaging in proper molecular engineering incorporating fluorenyl units, researchers have successfully developed organic dyes that significantly improve the efficiency of dye-sensitized solar cells (DSSCs). The optimization of the D-A-pi-A framework integrated with the fluorenyl moiety has shown promising results in enhancing the optoelectronic properties and photovoltaic performance of DSSCs. Devices fabricated with the MA1116 sensitizer demonstrated superior performance under standard AM 1.5 G solar conditions and dim-light illumination, showcasing the potential of fluorenyl unit integration in boosting DSSC efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
K. Periyasamy, P. Sakthivel, P. Vennila, P. M. Anbarasan, G. Venkatesh, Y. Sheena Mary
Summary: The synthesis and optimization of organic dyes based on phenothiazine and dibenzofuran for DSSCs were conducted in this study. The electronic and photovoltaic properties of the dyes were evaluated using various techniques, and the driving forces for electron injection and regeneration were assessed. Additionally, the effects of acceptor units, ?-conjugation bridges, phenothiazine, and dibenzofuran on the molecular energy levels were studied.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Chemistry, Physical
Tingxuan Wang, Xueliang Hao, Liang Han, Yujin Li, Qing Ye, Yanhong Cui
Summary: Three novel D-A-pi-A carbazole sensitizing dyes were synthesized with fluorenone as the auxiliary acceptor, benzene, furan and thiophene as pi bridge and cyanoacrylic acid as the anchoring acceptor, showing improved efficiency in photoelectric conversion. The introduction of different bridge groups affects the short-circuit current density and open-circuit voltage differently, with the dye containing a benzene bridge exhibiting the highest efficiency.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Physical
Li Zhang, Junjie Zhang, Xu Tang, Yong Chen, Xinting Wang, Zijian Deng, Changchun Wang, Xichuan Yang, Bin Sun
Summary: In this study, the design of coplanar organic dyes ZL002, ZL004, and ZL006 with rigid structures led to densely packed arrangements on the surface of TiO2, resulting in improved photoelectric properties, electron injection efficiency, and longer charge-recombination lifetime.
ACS APPLIED ENERGY MATERIALS
(2023)
Review
Chemistry, Physical
Afsaneh Farokhi, Hashem Shahroosvand, Fatemeh Zisti, Melanie Pilkington, Mohammad Khaja Nazeeruddin
Summary: This comprehensive review focuses on the application of triphenylamines (TPAs), a prominent class of organic molecules, in dye-sensitized/organic solar cells. By exploring synthesis strategies for TPA derivatives, researchers have successfully improved the power conversion efficiencies of the cells and provided strong support for future commercial applications.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Nanoscience & Nanotechnology
Masaaki Mitsui, Yushiro Nakagome, Yoshiki Niihori, Shota Inoue, Yutaka Fujiwara, Kenji Kobayashi
Summary: Two starburst-shaped organic chromophores were synthesized and applied to dye-sensitized solar cells. SB-08 showed better performance than SB-07, with a higher incident photon-to-current conversion efficiency and power conversion efficiency. This new architecture allows flexible modification of branches to enhance light-harvesting ability and electron transport pathways.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Energy & Fuels
Liyu Li, Xuexin Dai, Xiaoning Liao, Xufeng Zang, Jianping Huang, Hai Zhang, Xiaoli Yin, Yanping Hong
Summary: Research and exploitation of metal-free organic photosensitizers with multi-electron transfer channels have gained extensive attention in recent years due to their advantages over single-electron transfer analogues. Modulating structural segments such as donor phenoxazine/phenothiazine, n-bridge thiophene/benzene, and different alkyl side chain lengths can significantly impact the properties of dye.
Article
Business, Finance
Jiancheng Shen, John Griffith, Mohammad Najand, Licheng Sun
Summary: We examine the predictability of market emotions (fear, gloom, joy, optimism) on returns of S&P 500 Index and 10-year Treasury notes futures using VAR and TGARCH models. Our VAR models suggest that one of the four emotions (fear) has predictive power for stock index futures returns. Additionally, we find that joy and optimism measures of emotions influence Treasury futures market returns. Further analysis using a TGARCH model with an emotional sentiment measure (fear) reveals that fear significantly affects market returns and conditional volatility of futures markets.
JOURNAL OF BEHAVIORAL FINANCE
(2023)
Article
Chemistry, Multidisciplinary
Chen Wang, Panlong Zhai, Mingyue Xia, Wei Liu, Junfeng Gao, Licheng Sun, Jungang Hou
Summary: This study reports the reversible reconstruction behavior accompanied by copper dynamic evolution, leading to the formation of high-valent cobalt species in active sites during water-alkali electrolysis. The crucial roles of electronic structure evolution and oxygen-vacancy-site mechanism in catalyst activity are revealed through experimental and theoretical investigations.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhaozhong Fan, Ruichun Luo, Yanxue Zhang, Bo Zhang, Panlong Zhai, Yanting Zhang, Chen Wang, Junfeng Gao, Wu Zhou, Licheng Sun, Jungang Hou
Summary: Researchers have developed an indium-nickel dual-atom catalyst that exhibits high CO selectivity and achieves a high industrial CO partial current density. The synergistic effect of the dual-sites and oxygen bridge in the catalyst reduces the reaction barrier for *COOH formation and suppresses the undesired hydrogen evolution reaction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Teng Shao, Yuan Chang, Zhuwei Li, Yurou Song, Dingfeng Jin, Junfeng Gao, Licheng Sun, Jungang Hou
Summary: Artificial photosynthesis is a promising solution for the efficient production of hydrogen peroxide. A chemically bonded and plasmonic Z-scheme junction of WO and CNs was developed for high-performance artificial photosynthesis. This Z-scheme catalyst exhibits a high H2O2 generation rate, even under broad-spectrum response irradiation.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Nanoscience & Nanotechnology
Sebastian Svanstrom, Alberto Garcia Fernandez, Tamara Sloboda, T. Jesper Jacobsson, Fuguo Zhang, Fredrik O. L. Johansson, Danilo Kuhn, Denis Ceolin, Jean -Pascal Rueff, Licheng Sun, Kerttu Aitola, Hakan Rensmo, Ute B. Cappel
Summary: In this study, the band alignment and interfacial electric field variations of a fully functional lead halide perovskite solar cell structure under operating conditions were measured directly using hard X-ray photoelectron spectroscopy (HAXPES). The results showed that 70% of the photovoltage was generated at the back contact, with equal contributions from the hole transport material/gold interface and the perovskite/hole transport material interface.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Jian Du, Dexin Chen, Yunxuan Ding, Linqin Wang, Fei Li, Licheng Sun
Summary: Exploring highly active and durable electrocatalysts for oxygen evolution reaction (OER) is significant to achieve efficient anion exchange membrane (AEM) water electrolysis. In this study, hollow Co-based N-doped porous carbon spheres decorated with ultrafine Ru nanoclusters (HS-RuCo/NC) were developed as efficient OER electrocatalysts. The unique hollow structure with hierarchically porous characteristics contributed to fast mass transport and increased metal site exposure, while the in situ formed RuO2 and Co3O4 exhibited a synergistic effect on enhancing OER performance. The integration of HS-RuCo/NC into an AEM water electrolyzer resulted in improved cell voltage and long-term stability compared to commercial RuO2-based AEM water electrolyzer.
Article
Chemistry, Physical
Xiansheng Li, Mahdi Haghshenas, Linqin Wang, Jing Huang, Esmaeil Sheibani, Shichen Yuan, Xin Luo, Xuehan Chen, Changting Wei, Hengyang Xiang, Glib Baryshnikov, Licheng Sun, Haibo Zeng, Bo Xu
Summary: In this study, we designed a multifunctional small-molecule hole-transporting material (HTM) called X10 for use in perovskite quantum dot light-emitting diodes (Pe-QLEDs). X10 exhibited high hole mobility, good film-forming ability, strong solvent resistance, and defect passivation effect. Pe-QLEDs using X10 as the HTM achieved a promising external quantum efficiency (EQE) of 20.18%, which was 7-fold higher than that of reference HTM-TCTA-based ones (EQE approximately 2.88%). This is the first case where a small-molecule HTM has shown a high EQE over 20% in Pe-QLEDs. Our work provides important guidance for the rational design of multifunctional small-molecule HTMs for high-performance Pe-QLEDs.
ACS ENERGY LETTERS
(2023)
Article
Business, Finance
Zhaobo Zhu, Licheng Sun, Min Chen
Summary: When stocks are trading near their 52-week high, investors have low expectations for future returns. However, for firms with strong fundamentals, investors' expectations are too low, indicating the psychological anchor of the 52-week high. A trading strategy based on fundamental strength and the 52-week high outperforms the unconditional strategy by significantly increasing the average return. Interestingly, this effect is most evident when investor sentiment is high, but not observed among sophisticated institutions and short sellers.
REVIEW OF QUANTITATIVE FINANCE AND ACCOUNTING
(2023)
Article
Chemistry, Multidisciplinary
Rongmei Zhao, Peng Wang, Linqing Wang, Yuanju Zhao, Chenghao Ge, Licheng Sun, Lin Xie, Yong Hua
Summary: This study introduces an innovative approach using an in situ combined dual-hole transport layer with TIPS-Pn to improve the performance of perovskite solar cells (PSCs). The results show that this approach effectively extracts and transports hole carriers, resulting in a significant increase in the average power conversion efficiency of PSCs. Additionally, it improves the stability of PSCs.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Dexin Chen, Yunxuan Ding, Xing Cao, Linqin Wang, Husileng Lee, Gaoxin Lin, Wenlong Li, Guoheng Ding, Licheng Sun
Summary: In this study, a bimetallic Ni-Cu electrocatalyst was developed to enhance the oxidation of 5-hydroxymethylfurfural (HMF) by passivating the oxygen evolution reaction (OER) process.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Zhuofeng Li, Linqin Wang, Tao Wang, Licheng Sun, Wenxing Yang
Summary: Developing alternative electrolysis techniques is crucial for advancing electrocatalysis. Recent studies have shown that pulse electrochemical CO2 reduction reaction (CO2RR) can improve the selectivity of CO2RR. This study reveals that pulse electrolysis improves the C(2+) selectivity of CO2RR through dynamic controls of the surface CuxO/Cu composition.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Zi-Yang Xia, Wei Zhang, Cheng Chen, Hao-Xin Wang, Lin-Qin Wang, Ya-Wei Miao, Xing-Dong Ding, Li-Cheng Sun, Ming Cheng
Summary: In order to overcome the energy loss caused by the valence band offset between Cs2AgBiBr6 and the hole transport layer (HTL), a novel deep-level hole transport material (HTM) was designed and synthesized to optimize the energy level alignment. While the introduction of deep-level HTMs successfully reduced the valence band offset between Cs2AgBiBr6 and HTL, it also increased the valence band offset at the HTL/Au interface, limiting the improvement of the power conversion efficiency (PCE). To further improve the PCE, a gradient energy level arrangement combining the newly developed deep-level HTM with Spiro-OMeTAD was constructed. Through optimization, an impressive PCE of 3.50% with high open-circuit voltage and fill factor was achieved, making it one of the best Cs2AgBiBr6 perovskite solar cells.
Article
Multidisciplinary Sciences
Yilong Zhao, Yunxuan Ding, Wenlong Li, Chang Liu, Yingzheng Li, Ziqi Zhao, Yu Shan, Fei Li, Licheng Sun, Fusheng Li
Summary: Electrocatalytic urea synthesis is a promising alternative to traditional energy-intensive urea synthesis. By stabilizing intermediates of *NO2 and *CO, a CuWO4 catalyst achieves efficient co-reduction of CO2 and NO3- to urea via C-N coupling.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yue Zhao, Lei Ran, Rui Chen, Yurou Song, Junfeng Gao, Licheng Sun, Jungang Hou
Summary: This study presents an integrated photoanode by grafting covalent triazine frameworks as conjugated molecules on the surface of ferroelectric BaTiO3-x nanorod array, and constructing oxyhydroxide oxygen evolution cocatalyst (OEC). The integrated OEC/CTF/BTO array achieves high photocurrent density and low onset potential, while also exhibiting outstanding stability. The enhanced PEC activity is attributed to the integration of CTF and OEC, which enhances light-harvesting capability, boosts charge carrier mediation, and promotes water oxidation kinetics.
Article
Green & Sustainable Science & Technology
Guoheng Ding, Husileng Lee, Zhiheng Li, Jian Du, Linqin Wang, Dexin Chen, Licheng Sun
Summary: Ni2Fe8/Ni3S2/NF catalyst is fabricated on nickel foam by a simple one-pot hydrothermal reaction, exhibiting high current densities at low overpotential and outperforming noble metal-based catalysts. Coupled with Ni4Mo/MoO2/NF, the AEM-WE device shows high performance and durability, making the catalyst highly efficient and robust.
ADVANCED ENERGY AND SUSTAINABILITY RESEARCH
(2023)
