Article
Chemistry, Physical
Yawei Liu, Wenxing Yang, Qiaoli Chen, Zhaoxiong Xie, Tianquan Lian
Summary: This study investigates the distance-dependence of charge separation and charge recombination times in a model system of Pt-tipped CdS quantum dots and CdS nanorods, and its impact on photo-driven H2 production. The study reveals that the quantum efficiency of H2 generation and the lifetimes of electron transfer and charge recombination are influenced by the length of the nanorods, providing insights into the mechanism of photocatalytic H2 production.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Daisuke Yoshioka, Yusuke Yoneda, I-Ya Chang, Hikaru Kuramochi, Kim Hyeon-Deuk, Yoichi Kobayashi
Summary: Organic-inorganic nanohybrids using semiconductor nanocrystals coordinated with aromatic organic molecules have been extensively studied in optoelectronic materials. This study demonstrates the reversible displacement of coordination bonds between ligand molecules and zinc sulfide nanocrystals by light irradiation. Time-resolved spectroscopy and density functional theory calculations reveal that the displacement is driven by ultrafast hole transfer and the surviving radical anion of the ligand. These photoinduced ligand displacements have implications for the development of advanced photofunctional materials.
Article
Chemistry, Multidisciplinary
Xiaowei Yu, Kaikai Liu, Bolun Wang, Hongyue Zhang, Yuanyuan Qi, Jihong Yu
Summary: This study successfully developed a time-dependent polychrome stereoscopic luminescence system by designing a luminescence system with adjustable afterglow lifetime and multicolor quantum dots. The system allows tunable afterglow emission and has been applied in time-space division multiplexing, expanding the information capacity.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Hongjun Lin, Qilin Wei, Bao Ke, Wenchao Lin, Hualin Zhao, Bingsuo Zou
Summary: By using a doping strategy, we have synthesized lead-free perovskite with tunable fluorescence. The material shows dynamically adjustable emission wavelength from yellow to near-infrared by varying UV excitation. This study provides guidance for designing high-efficiency and excitation-dependent perovskite phosphors.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Sourav Maiti, Deepika Poonia, Pieter Schiettecatte, Zeger Hens, Pieter Geiregat, Sachin Kinge, Laurens D. A. Siebbeles
Summary: The study found that in a bilayer of ReS2 and tetracene, the transfer of photoexcited states from ReS2 to triplet states in tetracene occurred within 5 ps with an efficiency near 38%. This opens up new possibilities for heterostructure design of two-dimensional materials with suitable organics to produce long-lived triplets. Triplets have potential applications in optoelectronics, photovoltaics, photocatalysis, and photon upconversion.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Tianli Liu, Mengmeng Gu, Lingling Zhao, Xiuming Wu, Zaijun Li, Guang-Li Wang
Summary: A novel photoelectrochemical strategy was used to form a hole-transporting material on the surface of bismuth tungstate, creating a competent aptasensing platform for chloramphenicol. This platform allows for homogeneous, label-free, and split-mode detection.
CHEMICAL COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Ranjan Kumar Behera, Leepsa Mishra, Aradhana Panigrahi, Prasana Kumar Sahoo, Manas Kumar Sarangi
Summary: Transition metal dichalcogenide based quantum dots have unique tunable photophysics and are considered as next-generation quantum materials for technology-based semiconductor applications. This article discusses the controlled synthesis of MoS2 and WS2 quantum dots and their distinctive structural, optical, and electrical characteristics. The photophysics and charge transfer kinetics between the quantum dots and a redox-active biomolecule are studied, highlighting the potential applications in advanced optoelectronic devices and future quantum technology.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Peiyu Zeng, Wenhui Wang, Dongshuang Han, Jundong Zhang, Zhihao Yu, Jiaoyan He, Peng Zheng, Hui Zheng, Liang Zheng, Weitao Su, Dexuan Huo, Zhenhua Ni, Yang Zhang, Zhangting Wu
Summary: By combining a PbS quantum dot layer with a MoS2/WSe2 heterostructure, researchers have designed a photodiode with enhanced photovoltaic response. This device exhibits broadband photovoltaic response and fast response speed.
Article
Chemistry, Multidisciplinary
Yan B. Vogel, Maarten Stam, Jence T. Mulder, Arjan J. Houtepen
Summary: This article presents a strategy to actively engineer long-range charge transport in colloidal quantum dot assemblies by introducing ligand functionalities. The use of electronically coupled redox ligands enables a self-exchange chain reaction and facilitates long-range charge transport across the film. The different modes of charge transport in these assemblies and their manipulation through modulation of the Fermi level and redox ligand coverage are identified.
Article
Chemistry, Physical
Shi-Cheng Zhu, Shen Li, Bo Tang, Hao Liang, Bi-Jian Liu, Guangcan Xiao, Fang-Xing Xiao
Summary: The 0D/2D TMCs QDs/MXene heterostructures were designed to enhance the efficiency of photocatalytic hydrogen generation and anaerobic reduction reactions by controlling the direction of charge transport. MXene acts as an effective charge mediator, reducing charge recombination and prolonging charge lifetime.
JOURNAL OF CATALYSIS
(2021)
Article
Nanoscience & Nanotechnology
Shaohua Qu, Zihan Qiao, Wencheng Zhong, Kangqiang Liang, Xiue Jiang, Li Shang
Summary: This study established a FRET-based platform for monitoring the dynamic evolution of protein corona in complex biological media. The nature of initially adsorbed proteins on quantum dots significantly affects subsequent exchange behavior, with only a limited proportion of proteins being involved in the exchange process, which is also significantly influenced by the surface chirality of the quantum dots.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Yanchen Wang, Jiaxin Liu, Aifei Wang, Song Gao, Zihao Li, Junjie Li, Suhao Yan, Suwen Cheng, Zhicheng Song, Yupeng Zhang, Jingjin Dong, Jiupeng Cao, Fangfang Wang, Wei Huang, Tianshi Qin
Summary: Optical image encryption technology provides valuable applications in information storage and protection by controlling emission using specific wavelengths. In this study, sandwiched heterostructural nanosheets consisting of perovskite frameworks and polycyclic aromatic hydrocarbons were investigated. These nanosheets exhibited blue emissions under UVA-I irradiation, but showed different photoluminescent properties under UVA-II. The emission in Tp-PSK was attributed to fluorescence resonance energy transfer, while photoquenching was observed in Py-PSK due to competitive absorption. The unique photophysical features of these nanosheets in a narrow UV window were exploited for optical image encrypting.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Hinako Ebe, Ya-Kun Wang, Narumi Shinotsuka, Yu-Hong Cheng, Mizuho Uwano, Rikuo Suzuki, Yitong Dong, Dongxin Ma, Seungjin Lee, Takayuki Chiba, Edward H. Sargent, Junji Kido
Summary: The study focuses on the energy transfer between PQDs to improve device performance, and experiments show that the FRET process can enhance the PLQY of PQD films.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Yinjuan Ren, Zhonghui Nie, Fei Deng, Ziming Wang, Siyang Xia, Yue Wang
Summary: Experimental investigation of ultrafast dynamics in CsPbBr3@ZnS core-shell nanocrystals revealed hot hole transfer and charge transfer state formation. These results demonstrate that carrier dynamics modulation can improve the performance of perovskite nanocrystals.
Article
Engineering, Electrical & Electronic
Yaxin Zheng, Bahareh Sadeghimakki, Jacob A. L. Brunning, Evan M. Piano, Siva Sivoththaman
Summary: Researchers have developed a one-pot, high-throughput process to synthesize quaternary Zn-Cu-In-S (ZCIS) quantum dots (QDs) with higher structural crystallinity and lattice stability compared to traditional ternary Cu-In-S (CIS) QDs. The quaternary ZCIS QDs allow for further variation and flexibility of QD properties, with Cu deficiency induction via In- or Zn-excess precursor ratios improving photoluminescence (PL) intensity and structural stability. While ZnS overcoating was minimally beneficial for ZCIS cores, the highly emissive quaternary QDs produced through this scalable synthesis procedure are widely tunable and functionalizable for a variety of device applications.
IEEE TRANSACTIONS ON NANOTECHNOLOGY
(2021)
Article
Engineering, Environmental
Zechao Yang, Guizhi Zhang, Jianxin Zhang, Zhenxiao Pan, Siyuan Yang, Boping Liu, Huashang Rao, Xinhua Zhong
Summary: This study utilizes a synergistic passivation strategy with alkali metal and halogenoid ions in the NaSCN additive to enhance the quality and performance of CsPbI2Br films, effectively reducing nonradiative recombination loss and achieving a champion PCE of 14.63% in all-inorganic CsPbI2Br Perovskite solar cells.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Lingcong Li, Ruike Zhang, Zhujie Wu, Yao Wang, Jin Hong, Huashang Rao, Zhenxiao Pan, Xinhua Zhong
Summary: The preparation of high-efficiency perovskite solar cells in ambient air environment is challenging. In this study, a simple component engineering strategy is proposed to regulate the crystallization process of perovskite film, leading to improved crystallinity, reduced defect state density, and suppressed non-radiative recombination processes. The efficiency of the carbon-based perovskite solar cells reached a record high.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Jianxin Zhang, Guizhi Zhang, Yongyu Liao, Zhenxiao Pan, Huashang Rao, Xinhua Zhong
Summary: In this study, a novel hybrid hole conductor, Poly-3-hexylthiophene - CsPbI3 quantum dots (P-QD), was used to improve hole extraction in CsPbI2Br C-PSCs. The P-QD hybrid hole conductor effectively improved hole extraction by aligning perovskite/carbon energy-level and extending the optical response range of CsPbI2Br solar cells, resulting in an increased power conversion efficiency from 13.49% to 15.04%. This strategy provides a new approach for the construction of hole transport layers in carbon-based perovskite solar cells.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Cuiting Kang, Shuaihang Xu, Huashang Rao, Zhenxiao Pan, Xinhua Zhong
Summary: A strategy for constructing an all-inorganic 2D/3D CsPb2I4Br/CsPbI2Br bulk heterojunction (BHJ) by in situ reaction of excess PbI2 in a precursor solution with CsPbI2Br during annealing is proposed. The formed 2D/3D BHJ effectively passivates defects in 3D CsPbI2Br and reduces nonradiative recombination loss in carbon electrode-based perovskite solar cells (C-PSCs). The optimized C-PSCs achieve an open-circuit voltage of 1.32 V and an efficiency of 15.25%, which are the best results for CsPbI2Br-based C-PSCs.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Zhengyan Zhang, Han Song, Wenran Wang, Huashang Rao, Yueping Fang, Zhenxiao Pan, Xinhua Zhong
Summary: A ligand design strategy using mercaptopropionic acid (MPA) and inorganic ligands (ILs) as dual ligands on the surface of quantum dots (QDs) is developed to enhance the loading amount and optoelectronic performance of QD sensitizers. The ILs not only facilitate QD loading but also reduce interdot repulsion and form dense QD layers, while the pseudohalide SCN- has a passivation effect on QD surfaces and suppresses defect trap states. As a result, QDSCs based on dual SCN/MPA ligands achieve a certified efficiency of 16.10%, a new record for liquid junction QD solar cells.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yongyu Liao, Jianxin Zhang, Wenran Wang, Zechao Yang, Rong Huang, Jiage Lin, Lei Che, Guoying Yang, Zhenxiao Pan, Huashang Rao, Xinhua Zhong
Summary: Surface molecular passivation is an effective strategy to reduce defect-assisted recombination and nonradiative recombination loss in perovskite solar cells (PSCs). However, most passivating molecules bind weakly to the perovskite surface, resulting in weak passivation effects. In carbon-based perovskite solar cells (C-PSCs), the molecular passivation effect is more susceptible to disturbance during the preparation of carbon electrodes. In this study, a bidentate ligand 2,2'-Bipyridine (2Bipy) is used to passivate surface defects of CsPbI2.6Br0.4 perovskite films. The results show that 2Bipy exhibits a stronger chelation effect and achieves better passivation performance compared to monodentate pyridine (Py). As a result, the efficiency of C-PSCs is significantly improved, setting a new record efficiency for hole transport material-free inorganic C-PSCs.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ruike Zhang, Lingcong Li, Wenran Wang, Zhujie Wu, Yao Wang, Jin Hong, Huashang Rao, Zhenxiao Pan, Xinhua Zhong
Summary: Researchers reported a new method for fabricating wide-bandgap perovskite solar cells without acid treatment. Formamidine/cesium (FA/Cs) as an additive can effectively control the crystallization process of perovskite films, improving the crystallinity and efficiency of the solar cells.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jianxin Zhang, Guizhi Zhang, Pei-Yang Su, Rong Huang, Jiage Lin, Wenran Wang, Zhenxiao Pan, Huashang Rao, Xinhua Zhong
Summary: Defects in perovskite can be effectively passivated by choline halide (ChX), which binds with charged point defects. We found that ChI can react with CsPbI3 to form a novel crystal phase of one-dimensional (1D) ChPbI(3), which improves the photoluminescence lifetime and stability of the CsPbI3 film. The CsPbI3-based carbon-based solar cells achieved high efficiencies and set new records in hole transport material-free inorganic solar cells.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Yao Wang, Lingcong Li, Zhujie Wu, Ruike Zhang, Jin Hong, Jianxin Zhang, Huashang Rao, Zhenxiao Pan, Xinhua Zhong
Summary: A self-driven prenucleation strategy using formamide as the co-solvent is proposed to achieve fast nucleation and improve the crystalline quality of perovskite film.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Zhujie Wu, Yao Wang, Lingcong Li, Ruike Zhang, Jin Hong, Rong Huang, Lei Che, Guoying Yang, Huashang Rao, Zhenxiao Pan, Xinhua Zhong
Summary: In this study, a mild continuous pH control strategy using urea as a weak organic base was proposed to regulate the hydrolysis process of TiCl4 post-treatment. This strategy facilitated the formation of an anatase-dominated TiO2 surface layer on the mesoporous TiO2, leading to reduced defect density and improved charge extraction efficiency in perovskite solar cells (PSCs). The fabricated carbon electrode-based PSCs (C-PSCs) achieved an efficiency of 18.08%, the highest among C-PSCs based on wide-bandgap perovskites.
Article
Materials Science, Multidisciplinary
Guizhi Zhang, Jianxin Zhang, Zhenxiao Pan, Huashang Rao, Xinhua Zhong
Summary: Researchers synthesized a carbon nanotube/poly(3-hexylthiophene) (CNT/P3HT) composite as a hole transport material to construct state-of-the-art carbon-based perovskite solar cells (C-PSCs). The CNT in the composite provides a high-speed channel for hole transmission, lowering charge transmission impedance and improving hole extraction efficiency. Using this composite, CsPbI2Br C-PSCs achieved an increase in open-circuit voltage from 1.233 to 1.355 V and power conversion efficiency from 13.29% to 15.56%, setting a new record for all-inorganic perovskite C-PSCs.
SCIENCE CHINA-MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Sihang Ji, Xi Yuan, Zixuan Liu, Lijia Zhao, Ke Zhao, Jinju Zheng, Jialong Zhao, Jin Wang
Summary: This study synthesized Mn-doped two-dimensional perovskite microcrystals with changing halogen composition and investigated the photo- and thermal-induced degradation. It was found that ion migration and phase separation resulted in redshift of photoluminescence peak and reduced lifetime. Moreover, high temperature annealing induced B-site phase separation, transforming the mixed perovskite phase into pure PEA(2)PbBr(4) and PEA(2)MnBr(4).
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Biotechnology & Applied Microbiology
Qinghong Guo, Xuefang Guo, Nuo Ji, Bang Shen, Xinhua Zhong, Lihua Xiao, Yaoyu Feng, Ningbo Xia
Summary: Toxoplasma gondii is a widespread pathogen that infects various warm-blooded animals, including humans, leading to significant socioeconomic and healthcare burdens. Despite the lack of an ideal toxoplasmosis vaccine, targeting key pathways in the parasite's metabolism shows promise for new antiparasitic strategies.
MICROBIAL BIOTECHNOLOGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Li Jian-Hao, Song Han, Zhang Zheng-Yan, Pan Zhen-Xiao, Zhong Xin-Hua
Summary: The synergistic photoanode coating strategy was applied to inhibit charge recombination processes at the photoanode/electrolyte interface and improve the photovoltaic performance of ZCISe QDSC.
CHINESE JOURNAL OF INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Qi Cheng, Zhenxiao Pan, Huashang Rao, Xinhua Zhong
Summary: In this study, a lightweight 3DNG-Co4N/S aerogel material was designed and synthesized, which showed high sulfur loading capacity and high energy density for lithium-sulfur batteries. The experimental results demonstrated that under low electrolyte sulfur ratio conditions, the cathode material achieved high areal capacity and volumetric energy density, representing an important breakthrough in the field of lithium-sulfur batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
