Article
Chemistry, Multidisciplinary
Weijie Chen, Shuo Liu, Qingqing Li, Qinrong Cheng, Baosheng He, Zhijun Hu, Yunxiu Shen, Haiyang Chen, Guiying Xu, Xuemei Ou, Heyi Yang, Jiachen Xi, Yaowen Li, Yongfang Li
Summary: An effective method of enhancing the built-in electric field intensity in perovskite solar cells is reported in this study. By doping an organic ferroelectric material, PVDF:DH, an additional electric field is generated, promoting charge-carrier transport, perovskite growth, and improving the overall performance and stability of the solar cells.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Dan Wu, Wenhui Li, Haochen Liu, Xiangtian Xiao, Kanming Shi, Haodong Tang, Chengwei Shan, Kai Wang, Xiao Wei Sun, Aung Ko Ko Kyaw
Summary: Organic-inorganic halide perovskites have shown significant light detection potential similar to commercially available photodetectors. A new design guideline involving interfacial built-in electric field for efficient carrier separation and transport has been proposed, leading to high-performance perovskite photodiodes with high external quantum efficiency, responsivity, and long-term stability.
Article
Energy & Fuels
Dongwei Han, Quan Yuan, Zdenek Slanina, Xiaoxuan Tang, Siwei Yi, Dong-Ying Zhou, Filip Uhlik, Lai Feng
Summary: The study utilized a gradient doping strategy to optimize the inverted CsPbI2Br PeSCs, resulting in improved power conversion efficiency and device stability.
Article
Chemistry, Multidisciplinary
Gengling Liu, Xianyuan Jiang, Wenhuai Feng, Guo Yang, Xi Chen, Zhijun Ning, Wu-Qiang Wu
Summary: In this study, a synergic electron and defect compensation strategy was utilized to modulate the electronic structures and defect profiles of Sn perovskites by incorporating heterovalent metal halide salts. The modified Sn perovskites exhibited improved conductivity and reduced charge recombination loss, leading to a champion efficiency of 14.02% and a record-high photovoltage of 1.013 V. These results narrow the gap between Sn perovskite solar cells and Pb-based counterparts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Hui Shu, Changtao Peng, Qian Chen, Zhangfeng Huang, Chen Deng, Wenjie Luo, Haijin Li, Wenfeng Zhang, Wenhua Zhang, Yuelong Huang
Summary: Combining two complementary electron transport layers into a bilayer structure and utilizing a built-in field to overcome constraints can significantly improve the efficiency of perovskite solar cells. The developed C-TiO2(Li)/SnO2 bilayer ETL successfully improved V-OC and FF, achieving high photoelectric conversion efficiencies in different types of PSCs.
Article
Chemistry, Physical
Changfa Guo, Lei Li, Fang Chen, Jiqiang Ning, Yijun Zhong, Yong Hu
Summary: This study reports the synthesis of CdS/CoP hybrid nanorods through one-step phosphorization, achieving synchronized gradient-P-doped CdS NRs and CoP cocatalyst. The optimized gP-CdS/CoP HNRs exhibit remarkably enhanced photocatalytic water reduction performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Bin Han, Yaohua Wang, Chang Liu, Kexuan Sun, Mengjin Yang, Lisha Xie, Shuncheng Yang, Yuanyuan Meng, Shuyuan Lin, Peng Xu, Jun Li, Qingqing Qiu, Ziyi Ge
Summary: By incorporating a two-dimensional ferroelectric material into a three-dimensional perovskite, the built-in electric field is increased, enhancing exciton dissociation efficiency and leading to the formation of more homogeneous and highly-oriented perovskite crystals. This results in a highly efficient flexible perovskite solar cell with a power conversion efficiency of over 23% and outstanding ambient stability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Energy & Fuels
Yipeng Han, Haibing Xie, Eng Liang Lim, Dongqin Bi
Summary: The quality of the perovskite film is crucial to the technological breakthrough of perovskite solar cells (PSCs). The two-step method is an effective way to achieve high quality and reproducibility of perovskite films. This article summarizes the reaction mechanism of the two-step method and introduces the strategies for preparing high-quality films. It also discusses the current issues and future research suggestions for the two-step method.
Article
Nanoscience & Nanotechnology
Tianhao Wu, Xiao Liu, Xinhui Luo, Hiroshi Segawa, Guoqing Tong, Yiqiang Zhang, Luis K. Ono, Yabing Qi, Liyuan Han
Summary: Lead-free tin perovskite solar cells have shown rapid development and promising efficiency, with the fabrication of a formamidinium tin iodide perovskite absorber with a vertical Sn2+ gradient to enhance the built-in electric field. The depth-dependent X-ray photoelectron spectroscopy revealed an increase in efficiency and open-circuit voltage for the tin PSCs, even after continuous operation under 1-sun illumination for 1,000 hours.
NANO-MICRO LETTERS
(2022)
Article
Energy & Fuels
S. Karthick, H. Hawashin, N. Parou, S. Vedraine, S. Velumani, J. Boucle
Summary: The study investigates the effect of incorporating CuI and BiI3 into perovskite solar cells, finding that doped devices exhibit reduced performance and faster recombination kinetics compared to undoped samples. Fine control of defect states is crucial for achieving better device performance when using such doping strategies.
Article
Physics, Condensed Matter
Dyutimoy Chakraborty, Srest Somay, Saurabh Kumar Pandey
Summary: This article presents a comprehensive numerical study of HTL-free perovskite solar cells. By optimizing factors like absorber thickness, doping density, and interface defects, the performance parameters of the solar cells have been improved, resulting in a higher power conversion efficiency.
MICRO AND NANOSTRUCTURES
(2022)
Article
Engineering, Environmental
Shuai Mao, Guoying Yao, Peng Liu, Chun Liu, Yi Wu, Zhoutian Ding, Chao Ding, Mingzhu Xia, Fengyun Wang
Summary: Transition metal oxide-mediated activation of peroxymonosulfate (PMS) for organic pollutant degradation has gained considerable attention. In this study, a composite PMS activator of S-doped g-C3N4/NiCo2O4 was developed, showing efficient degradation of tetracycline (TC) with a removal efficiency of 96.9% within 30 minutes. The introduction of sulfur doping widened the work function difference and enhanced the electric field intensity of the heterojunctions between g-C3N4 and NiCo2O4, promoting directional electron transfer and accelerating the redox cycle to generate reactive oxygen species (ROS). Experimental and theoretical analyses revealed that the main ROS involved in TC degradation were 1O2, generated through the conversion of SO4-, OH•, and O2•-. Additionally, high-valent cobalt-oxo species (CoIV = O) also contributed to TC degradation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Energy & Fuels
Zhifang Wu, Enbing Bi, Chongwen Li, Lei Chen, Zhaoning Song, Yanfa Yan
Summary: This review provides an overview of two-step methods for fabricating efficient and stable perovskite solar modules (PSMs). The mechanisms of two-step perovskite conversion and advanced engineering approaches to modulate the perovskite formation process are discussed. The progress of efficient PSCs prepared by different two-step methods is surveyed and the advantages and disadvantages of each method for the scalable production of PSMs are compared. It is highlighted that the vapor-based two-step methods are promising for high-throughput in-line production of PSMs.
Article
Energy & Fuels
Lingyan Lin, Ping Li, Linqin Jiang, Zhenjing Kang, Qiong Yan, Hao Xiong, Shuiyang Lien, Peng Zhang, Yu Qiu
Summary: Carbon-based perovskite solar cells have attracted attention for their low cost and simple structure but still lag behind conventional PSCs. Gradient doping of the absorber enhances efficiency and simplifies fabrication process, offering theoretical guidance for high-performance C-PSC design.
Article
Energy & Fuels
Tzu-Sen Su, Tzu-En Fan, Hio-Kun Si, Duc-Anh Le, Nideesh Perumbalathodi, Tzu-Chien Wei
Summary: This study compares the properties of PVSK films made by one-step and two-step methods, revealing their horizontal and vertical non-uniformity, as well as the presence of considerable unreacted species in both films. Despite these differences, both films are able to achieve nearly 20% conversion efficiency, showcasing the potential for further improvement in the future.
Article
Engineering, Mechanical
Yan Xu, Caijin Yang, Weihua Zhang, Weidong Zhu, Wei Fan, Guiming Mei, Jian Mou
Summary: This paper studies the influence of lateral and local rail deformation on the train-track interaction dynamics in high-speed railways. A more realistic model that accurately and efficiently analyzes the influence of lateral and local rail deformation on the dynamics of train-track interaction is proposed. The risk of derailment and rail damage increases with the increasing amplitude of lateral and local rail deformation.
VEHICLE SYSTEM DYNAMICS
(2022)
Article
Engineering, Multidisciplinary
Jiawei Yang, Zeping Wu, Wenjie Wang, Weihua Zhang, Hailong Zhao, Jingbo Sun
Summary: A mixed-variable surrogate-based optimization algorithm framework is proposed to effectively address mixed-variable aircraft design problems, showing competitive results compared to other heuristic algorithms and surrogate-based algorithms.
ENGINEERING OPTIMIZATION
(2022)
Article
Energy & Fuels
Daiyu Li, Pei Jiang, Wenhao Zhang, Jiankang Du, Chen Qiu, Jiale Liu, Yue Hu, Yaoguang Rong, Anyi Mei, Hongwei Han
Summary: The study successfully modulated the series resistance (R-S) in fully printable mesoscopic PSCs through optimizing device geometry and improving materials, resulting in a significant increase in power conversion efficiency (PCE). By utilizing measures such as a rectangular device shape, tin busbars, and a hot-pressed highly conductive low-temperature carbon layer on the back electrode, the R-S was effectively reduced and the fill factor (FF) was improved.
Article
Genetics & Heredity
Johann S. Hawe, Rory Wilson, Katharina T. Schmid, Li Zhou, Lakshmi Narayanan Lakshmanan, Benjamin C. Lehne, Brigitte Kuehnel, William R. Scott, Matthias Wielscher, Yik Weng Yew, Clemens Baumbach, Dominic P. Lee, Eirini Marouli, Manon Bernard, Liliane Pfeiffer, Pamela R. Matias-Garcia, Matias Autio, Stephane Bourgeois, Christian Herder, Ville Karhunen, Thomas Meitinger, Holger Prokisch, Wolfgang Rathmann, Michael Roden, Sylvain Sebert, Jean Shin, Konstantin Strauch, Weihua Zhang, Wilson L. W. Tan, Stefanie M. Hauck, Juliane Merl-Pham, Harald Grallert, Eudes G. Barbosa, Thomas Illig, Annette Peters, Tomas Paus, Zdenka Pausova, Panos Deloukas, Roger S. Y. Foo, Marjo-Riitta Jarvelin, Jaspal S. Kooner, Marie Loh, Matthias Heinig, Christian Gieger, Melanie Waldenberger, John C. Chambers
Summary: This study focuses on the relationships between DNA sequence variation and DNA methylation, using blood samples from Europeans and South Asians. The findings reveal numerous SNP-CpG associations (meQTL) that are functionally relevant and associated with gene expression, metabolic variation, and clinical traits. Molecular interaction and colocalization analyses identified regulatory pathways linking meQTL loci to phenotypic variation.
Article
Engineering, Mechanical
Dehua Zhang, Caijin Yang, Weihua Zhang, Yao Cheng
Summary: An adaptive tracking control method is proposed for achieving running control of all-wheel-driving and active-steering articulated vehicles with multiple units. The method involves real-time target trajectory generation and an adaptive tracking control system, which enables accurate trajectory tracking and coordinated movement for the vehicles. Simulation results show excellent tracking control performance and the method is compared with different control methods to demonstrate its effectiveness.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING
(2022)
Article
Public, Environmental & Occupational Health
Kun Wang, Weihua Zhang, Lai Jin, Zhongxiang Feng, Dianchen Zhu, Haozhe Cong, Haiyang Yu
Summary: Factors such as visibility, road type, road surface condition, and road alignment have significant impacts on the severity of pedestrian-vehicle collisions and vehicle-vehicle collisions under low-visibility conditions. Collisions on highways, poor road pavement, and non-straight-line sections are more likely to result in fatal or serious injuries. The study findings can help in developing more effective strategies to reduce casualties in traffic crashes under low-visibility conditions.
TRAFFIC INJURY PREVENTION
(2022)
Article
Chemistry, Multidisciplinary
Jiale Liu, Sheng Li, Shuang Liu, Yanmeng Chu, Ting Ye, Cheng Qiu, Zexiong Qiu, Xiadong Wang, Yifan Wang, Yaqiong Su, Yue Hu, Yaoguang Rong, Anyi Mei, Hongwei Han
Summary: This study demonstrates the use of magnesium (Mg) to manage oxygen vacancies (OVs) and achieve efficient printable perovskite solar cells (PSCs) with a high-temperature mesoporous SnO2 electron transport layer (ETL). The high-temperature annealing process reduces self-doping of SnO2 by reducing OVs, while the introduced Mg promotes OV formation. The synergistic effect of Mg on OVs increases carrier density and raises the Fermi level energy of the mp-SnO2 ETL, resulting in a significant improvement in device performance.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Biology
Marie Loh, Weihua Zhang, Hong Kiat Ng, Katharina Schmid, Amel Lamri, Lin Tong, Meraj Ahmad, Jung-Jin Lee, Maggie C. Y. Ng, Lauren E. Petty, Cassandra N. Spracklen, Fumihiko Takeuchi, Md Tariqul Islam, Farzana Jasmine, Anuradhani Kasturiratne, Muhammad Kibriya, Karen L. Mohlke, Guillaume Pare, Gauri Prasad, Mohammad Shahriar, Miao Ling Chee, H. Janaka de Silva, James C. Engert, Hertzel C. Gerstein, K. Radha Mani, Charumathi Sabanayagam, Marijana Vujkovic, Ananda R. Wickremasinghe, Tien Yin Wong, Chittaranjan S. Yajnik, Salim Yusuf, Habibul Ahsan, Dwaipayan Bharadwaj, Sonia S. Anand, Jennifer E. Below, Michael Boehnke, Donald W. Bowden, Giriraj R. Chandak, Ching-Yu Cheng, Norihiro Kato, Anubha Mahajan, Xueling Sim, Mark McCarthy, Andrew P. Morris, Jaspal S. Kooner, Danish Saleheen, John C. Chambers
Summary: South Asians have a higher risk of developing type 2 diabetes (T2D). Through a genomewide association meta-analysis, researchers identified 21 novel genetic loci associated with T2D, which are linked to adiposity and glucose metabolism. A polygenic risk score based on South Asian-derived summary statistics can predict T2D risk.
COMMUNICATIONS BIOLOGY
(2022)
Article
Engineering, Mechanical
Yan Xu, Zhendong Liu, Caijin Yang, Weihua Zhang, Weidong Zhu, Sebastian Stichel, Xiaoying Liu
Summary: Fastening failures on China high-speed railway curved tracks have been frequently found, leading to the need for analyzing their influence on train-track interaction. A train-curved slab track interaction model is built and validated, and it is found that failure of the rail pad can seriously affect the safety of high-speed train operation.
ACTA MECHANICA SINICA
(2022)
Article
Chemistry, Physical
Li Hong, Zaiwei Wang, Jovana V. Milic, Claudia E. Avalos, Weihua Zhang, Dan Ren, Cheng Wang, Brian Carlsen, Yuhang Liu, Shaik Mohammed Zakeeruddin, Anders Hagfeldt, Ti Wang, Hongwei Han, Michael Graetzel
Summary: By modulating the structure of the perovskite film using formamidinium thiocyanate, researchers have achieved enhanced light absorption and improved power conversion efficiency in two-dimensional hybrid perovskite solar cells. The modified film also exhibits excellent moisture stability, making it a promising candidate for solar cell applications.
CHEMISTRY OF MATERIALS
(2022)
Article
Engineering, Civil
Weiren Zhang, Fan Yang, Siyuan Zhang, Yijie Bian, Peng Wang, S. A. Meguid
Summary: This paper presents a new multicellular design for effective energy absorption. Extensive experiments, simulations, and analysis were conducted to evaluate the performance of this design. The results show that a face centered square layout with an appropriately selected taper angle has excellent energy absorption and crashworthiness properties.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Review
Chemistry, Physical
Cheng Qiu, Lukas Wagner, Jiale Liu, Wenhao Zhang, Jiankang Du, Qifei Wang, Yue Hu, Hongwei Han
Summary: This review provides a comprehensive overview of the measurement techniques for carrier dynamics in perovskite solar cells (PSCs), aiming to provide researchers with the necessary knowledge to choose suitable measurement methods.
Article
Oncology
Yanqiao Ren, Yusheng Guo, Lei Chen, Tao Sun, Weihua Zhang, Bo Sun, Licheng Zhu, Fu Xiong, Chuansheng Zheng
Summary: This study compared the efficacy and safety of D-TACE-C and C-TACE-C in the treatment of unresectable HCC. The results showed that D-TACE-C group had significantly longer PFS and higher DCR compared to the C-TACE-C group. D-TACE-C is a safe and well-tolerated treatment that may produce better PFS and tumor response in patients with unresectable HCC.