Article
Nanoscience & Nanotechnology
Jiayan Liu, Nana Liu, Gu Li, Yuqi Wang, Zhen Wang, Zhen Zhang, Dongdong Xu, Yue Jiang, Xingsen Gao, Xubing Lu, Shien-Ping Feng, Guofu Zhou, Jun-Ming Liu, Jinwei Gao
Summary: The poor interfacial contact and imperfections between the charge transport layer and perovskite film can lead to carrier recombination, inefficient charge collection, and inferior stability of perovskite solar cells (PSCs). To address this issue, a cinnamate-functionalized cellulose nanocrystals (Cin-CNCs) interfacial layer was introduced between SnO2 and the perovskite active layer. This improved the carrier transport ability, crystal growth, and long-term stability of PSCs. The results showed enhanced interfacial contact, cascade energy alignment, desirable perovskite film morphology, reduced interfacial defects, and suppressed charge recombination.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Chemistry, Multidisciplinary
Wanchun Xiang, Shengzhong (Frank) Liu, Wolfgang Tress
Summary: Metal halide inorganic perovskite materials are of interest for photovoltaic applications due to their superior thermal stability. Solar cells based on inorganic perovskites have achieved a PCE over 20%, with more room for improvement compared to organic-inorganic hybrid perovskite solar cells. Interfaces play a crucial role in limiting the photovoltage and charge extraction efficiency in inorganic perovskite solar cells.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Yong-Chun Ye, Li Chen, Xian-Min Chen, Chun-Ying Ma, Bing-Hao Lv, Jiang-Ying Wang, Wei-Dong Dou, Chu Zhang, Ting-Li Ma, Jian-Xin Tang
Summary: The use of a molecule bridging layer between tin oxide and perovskite enables better energy level alignment and superior interfacial contact, resulting in improved conductivity and electron extraction in perovskite solar cells. The modified cells achieve high power conversion efficiencies of 23.25% and 20.23% for different device sizes.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Lisha Xie, Junni Xie, Shurong Wang, Bin Chen, Chenguang Yang, Zhen Wang, Xiaobo Liu, Jiangzhao Chen, Kun Jia, Feng Hao
Summary: By passivating defects in perovskite solar cells and effectively inhibiting nonradiative recombination, the synthesized fluorinated oligomer FO-19 achieves a high power conversion efficiency of 21.23% for MAPbI(3)-based PSCs, while also improving humidity and thermal stability. This work provides insights into achieving high-efficiency and stable PSCs through fluorinated additive engineering.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Environmental
Xing Guo, Xiangping Huang, Jie Su, Zhenhua Lin, Jing Ma, Jingjing Chang, Yue Hao
Summary: This study demonstrates a metal oxide/perovskite heterojunction engineering approach using LiF-doped SnO2 at the interface, which can modulate lattice constants, reduce lattice mismatch, and enhance charge transfer, resulting in improved efficiency and stability of perovskite solar cells.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Shaobing Xiong, Ying Dai, Jianming Yang, Wei Xiao, Danqin Li, Xianjie Liu, Liming Ding, Pingping Gao, Mats Fahlman, Qinye Bao
Summary: Introducing TBAPF(6) modifier successfully changed the surface properties of the perovskite film, transforming it from p-type to n-type, promoting an increase in electron carrier density and charge transport, effectively suppressing nonradiative recombination, and improving device power conversion efficiency.
Review
Energy & Fuels
Shini Foo, Mariyappan Thambidurai, Ponnusamy Senthil Kumar, Rathinam Yuvakkumar, Yizhong Huang, Cuong Dang
Summary: This article discusses the advancements and roles of electron transport layers (ETLs) in perovskite solar cells, as well as explores the effects of ETLs on charge transport, hysteresis, and stability.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Yiqing Zhang, Yingzhu Zhang, Benfang Niu, Yanchun Huang, Haotian Wu, Weifei Fu, Hongzheng Chen
Summary: 2D/3D/2D-structured perovskite films are constructed by depositing phenethylammonium bromide (PEABr) on top and 2D perovskite PEA2FA2Pb3Br10 at the bottom of 3D perovskite. Finally, a power conversion efficiency of 24.2% is achieved, and the encapsulated device maintains 93.5% of its initial efficiency under 1 sun equivalent illumination of 1000 h in air with a humidity of 50 ± 5%.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Tian Du, Shudi Qiu, Xin Zhou, Vincent M. Le Corre, Mingjian Wu, Lirong Dong, Zijian Peng, Yicheng Zhao, Dongju Jang, Erdmann Spiecker, Christoph J. Brabec, Hans-Joachim Egelhaaf
Summary: Printable planar carbon electrodes are found to be a promising alternative to thermally evaporated metals as the rear contact for perovskite solar cells (PSCs). However, the power conversion efficiencies (PCEs) of carbon-electrode PSCs lag behind metal-electrode PSCs. In this study, a hole-transporting bilayer (HTbL) configuration is proposed to simultaneously improve the fill factor and open-circuit voltage of carbon-electrode PSCs, leading to a significantly higher PCE of 19.2% compared to 17.3%. This research demonstrates the potential of fully printed carbon-electrode PSCs with HTbLs as a highly cost-effective photovoltaic technology.
Article
Chemistry, Applied
Shasha Zhang, Xiaobo Yan, Zonghao Liu, Hongmei Zhu, Zhichun Yang, Yuqian Huang, Sanwan Liu, Di Wu, Ming Pan, Wei Chen
Summary: A simple and efficient double-sided interfacial passivation method DIP-KCl is reported, which can effectively reduce defects in perovskite solar cells and improve performance, leading to increased efficiency and stability.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Xiaoyuan Liu, Jihyun Min, Qian Chen, Tuo Liu, Geping Qu, Pengfei Xie, Hui Xiao, Juin-Jei Liou, Taiho Park, Zong-Xiang Xu
Summary: Defects and energy offsets at the interfaces of perovskite have a negative impact on the efficiency and stability of perovskite solar cells. In this study, an amphiphilic pi-conjugated ionic compound was designed to simultaneously address the defects and interface energy level misalignment. The modified perovskite solar cells showed improved efficiency and excellent thermal stability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Engineering, Environmental
Ibrahima Ka, Ivy M. Asuo, Riad Nechache, Federico Rosei
Summary: In this study, PbS quantum dots were used on perovskite solar cells to improve stability. The best devices showed improved long-term stability, maintaining over 84% of the initial performance after 30 days of storage in ambient air. In addition to increased efficiency, the devices with PbS quantum dots also exhibited a reduction in hysteresis behavior.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Detao Liu, Hualin Zheng, Yameen Ahmed, Chaoyue Zheng, Yafei Wang, Hao Chen, Li Chen, Shibin Li
Summary: The study demonstrates that using ionic liquid to modify SnO2 can improve the performance of f-PSCs and increase power conversion efficiency. This improvement is achieved mainly through enhancing interfacial charge transfer and intra-perovskite charge transport.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Applied
Hualin Zheng, Xuefeng Peng, Tingxi Chen, Ting Zhang, Shihao Yuan, Lei Wang, Feng Qian, Jiang Huang, Xiaodong Liu, Zhi David Chen, Yanning Zhang, Shibin Li
Summary: The surface defects of 2D perovskite play a limiting role in the performance of perovskite solar cells (PVSCs). In this study, a modification strategy using 1-butyl-3-methylimidazolium trifluoromethanesulfonate (BMIMOTF) was found to effectively reduce defect density and suppress nonradiative recombination. The modified devices achieved a high efficiency of 21.38% and displayed enhanced humidity and thermal stability.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Zhen Wang, Yuanlin Lu, Zhenhua Xu, Jinlong Hu, Yijun Chen, Cuiling Zhang, Yousheng Wang, Fei Guo, Yaohua Mai
Summary: A study on the fabrication of flexible FA-alloyed perovskite solar cells using solvent engineering and embedding 2D/3D perovskite heterostructures strategy has achieved high efficiency and improved mechanical robustness.
Article
Polymer Science
Junwei Wang, Kui Feng, Sang Young Jeong, Bin Liu, Yimei Wang, Wenchang Wu, Yongxin Hou, Han Young Woo, Xugang Guo
Summary: This study successfully synthesized two polymers with excellent n-type characteristics by combining specific substituent benzochalcogenadiazole and diketopyrrolopyrrole building blocks, providing new building blocks and approaches for the development of n-type organic thermoelectric materials.
Article
Nanoscience & Nanotechnology
Xijian Duan, Jingrui Ma, Wenda Zhang, Pai Liu, Haochen Liu, Junjie Hao, Kai Wang, Lars Samuelson, Xiao Wei Sun
Summary: HF processing was used to eliminate the InPOx defect in red InP quantum dots and improve the fluorescence efficiency. The record-breaking red InP quantum dots were synthesized with the assistance of tri(dimethylamino)phosphine [(DMA)3P], achieving a maximum photoluminescence quantum yield of 97.7%. The external quantum efficiency and brightness of the quantum dot light-emitting diode device were also improved accordingly.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Suxiang Ma, Junwei Wang, Kui Feng, Hao Zhang, Ziang Wu, Yimei Wang, Bin Liu, Yongchun Li, Mingwei An, Raul Gonzalez-Nunez, Rocio Ponce Ortiz, Han Young Woo, Xugang Guo
Summary: We report a strongly electron-deficient dithienylpyrazinediimide (TPDI) and its n-type semiconducting polymers, which exhibit n-type transport character with an electron mobility of up to 0.44 cm2 V-1 s-1 in organic thin-film transistors. The incorporation of pyrazine into imide-functionalized (hetero)arenes is an effective strategy to develop high-performance n-type polymers for organic optoelectronic devices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Yang Liu, Hao Wu, Guozheng Shi, Yusheng Li, Yiyuan Gao, Shiwen Fang, Haodong Tang, Wei Chen, Tianshu Ma, Irfan Khan, Kai Wang, Changlei Wang, Xiaofeng Li, Qing Shen, Zeke Liu, Wanli Ma
Summary: By introducing multifunctional ligands to coordinate the complicated CQDs surface with the thermodynamically optimal configuration, a synergistic passivation is performed in the direct synthesis of conductive PbS CQD inks. This leads to an order lower surface trap density and beneficial doping behavior, resulting in high V-oc and power conversion efficiency (PCE) for the reported PbS CQD solar cells.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Applied
Qing-Hu Teng, Gui-Xia Sun, Fang-Ping Huang, Kai Wang, Fu-Pei Liang
Summary: A visible-light-induced cerium-catalyzed N-demethylation of N-methyl amides under air atmosphere is developed, leading to the corresponding N-demethylated amides. The excited states of [(CeCl4)2-] can activate N-methyl amides. This reaction offers a methodology to cleave the C-N bond of amides under air conditions.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Thermodynamics
Kai Wang, Inoue Junya, Chun -Yen Li, Songbai Cheng, Koji Okamoto
Summary: The effects of electron beam irradiation on critical heat flux (CHF) of aluminum surfaces in downward-facing saturated flow boiling were investigated. It was found that although the contact angle decreased greatly after irradiation, no obvious CHF and heat transfer coefficient change was observed up to a total dose of 3000 kGy. The bubble coverage was calculated and believed to be strongly associated with boiling crisis. The insensitivity of CHF in aluminum may be related to easy oxidation on the aluminum surface. This finding may be helpful for future heat transfer design and anti-accident counter-measurements in radiation environments.
APPLIED THERMAL ENGINEERING
(2023)
Article
Materials Science, Ceramics
Bowen Sun, Danyue Ma, Guohua Bai, Jixi Lu, Ke Yang, Kai Wang, Xueping Xu, Yueyang Zhai, Wei Quan, Bangcheng Han
Summary: This study evaluated the magnetic noise of Mn-Zn ferrite magnetic shield based on its grain size and established a correlation between grain size and magnetic permeability. The predicted values of the magnetic noise were consistent with the experimental results, suggesting the feasibility of the proposed approach for developing low-noise magnetic shields.
CERAMICS INTERNATIONAL
(2023)
Review
Neurosciences
Chunyan Zhu, Ting Zhang, Qianqian Li, Xingui Chen, Kai Wang
Summary: The COVID-19 pandemic has negatively affected the physical and mental health of the public, leading to a significant increase in depression and anxiety. Physicians and researchers should focus on high-risk groups and investigate the neural mechanisms and intestinal microbiome related to depression and anxiety.
NEUROSCIENCE BULLETIN
(2023)
Review
Medicine, Research & Experimental
Meng Kong, Yanan Li, Kai Wang, Shisong Zhang, Yi Ji
Summary: Infantile hemangioma (IH) is the most common benign vascular tumor in infants, with clear disease stages and durations. Although most IHs can regress naturally, a small percentage can cause disfigurement or even be fatal. The mechanisms behind IH development are still not fully understood. Establishing stable and reliable IH models provides a standardized experimental platform for understanding its pathogenesis and developing new drugs and treatments. This article summarizes the research progress and clinical utility of various IH models, as well as the benefits and drawbacks of each. Researchers should select specific IH models based on their research objectives to achieve their anticipated experimental goals and increase the clinical relevance of their findings.
JOURNAL OF TRANSLATIONAL MEDICINE
(2023)
Editorial Material
Plant Sciences
Feng-Ying Han, Yu-Kun Qi, Yu-Tong Zhang, Jian-Hua Qi, Jun-Wei Wang, Wen-Zhang Liu, Yan-Ping Ji, Qing-Hai Wang
Article
Multidisciplinary Sciences
Bin Liu, Huiliang Sun, Jin-Woo Lee, Zhengyan Jiang, Junqin Qiao, Junwei Wang, Jie Yang, Kui Feng, Qiaogan Liao, Mingwei An, Bolin Li, Dongxue Han, Baomin Xu, Hongzhen Lian, Li Niu, Bumjoon J. Kim, Xugang Guo
Summary: The degradation of kinetically trapped bulk heterojunction film morphology in organic solar cells is a major challenge for their practical use. In this study, the authors demonstrate highly thermally stable organic solar cells with a multicomponent photoactive layer synthesized through a simple one-pot polymerization method, achieving an efficiency of 11.8% and a T80 of 1000 hours. These findings provide a pathway for the development of low-cost and long-term stable organic solar cells.
NATURE COMMUNICATIONS
(2023)
Article
Neurosciences
Yuwei Zhou, Guixian Xiao, Qing Chen, Yuyang Wang, Lu Wang, Chengjuan Xie, Kai Wang, Xingui Chen
Summary: High-definition transcranial direct current stimulation (HD-tDCS) can modulate decision-making, but the neurophysiological mechanisms behind this effect are still unclear. In this study, participants underwent anodal/sham HD-tDCS sessions targeting the left DLPFC. The results showed that anodal HD-tDCS improved decision-making function and increased P300 amplitude and theta oscillation power. Theta oscillation power may serve as a predictor of improved decision-making.
Review
Cardiac & Cardiovascular Systems
Tao Wang, Xinzhe Chen, Kai Wang, Jie Ju, Xue Yu, Shaocong Wang, Cuiyun Liu, Kun Wang
Summary: The Cre-loxP-mediated genetic lineage tracing system is crucial for tracking the fate of single-cell progeny or cell populations. Understanding the hierarchy of cardiac progenitor cells helps to uncover cell fate and origin in cardiac development. Several prospective Cre-loxP-based lineage-tracing systems have been utilized to precisely analyze the fate determination and developmental characteristics of different cardiac cell types.
FRONTIERS IN CARDIOVASCULAR MEDICINE
(2023)
Article
Materials Science, Multidisciplinary
Jun-Cheng Yang, Zhiyuan Fu, Huili Ma, Tao Wang, Qiuying Li, Kai Wang, Lin Wu, Pu Chen, Hai-Tao Feng, Ben Zhong Tang
Summary: A novel emitter (DCzPy) was synthesized and its stimuli-responsive luminescence was studied. The emitter showed bluegreen fluorescence in the crystalline state, with dramatically enhanced and hypsochromic-shifted fluorescence upon gentle grinding. The emission wavelength returned to the original state after further heavy grinding. Under isotropic compression, the emitter exhibited a large bathochromic-shifted and weakened fluorescence. In addition, in the film state, the emission color of the emitter changed from green to blue as the temperature increased.
ACS MATERIALS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Yuxiang Dai, Haichao Liu, Ting Geng, Ruijie Duan, Xiaoming Li, Yongli Liu, Wengang Liu, Ben-Guo He, Laizhi Sui, Kai Wang, Bo Zou, Bing Yang, Yang Qi
Summary: The wide application of excimer materials in the OLED field is mainly driven by the regulation of their stacking structure. This study designed three anthracene derivative molecules with sterically hindered substituents and prepared crystals with different aggregating structures to investigate the relationship between their structures and properties. The study found that under high pressures, these anthracene groups exhibit enhanced fluorescence during the formation of excimers, while the ones that have already formed excimers under ambient conditions show a wider red-shift range. The piezochromic fluorescence behavior observed indicates that regulating the aggregation mode of anthracene groups can meet different application requirements and guide the expansion of excimer materials' usage.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
