Article
Chemistry, Multidisciplinary
Shuchen Zhang, Zih-Yu Lin, Enzheng Shi, Blake P. Finkenauer, Yao Gao, Alan J. Pistone, Ke Ma, Brett M. Savoie, Letian Dou
Summary: This study quantitatively investigates in-plane thermally driven anionic inter-diffusion in a series of novel 2D and quasi-2D halide perovskites lateral heterostructures, revealing that bulky pi-conjugated organic cations inhibit Br-I inter-diffusion and halide diffusion is faster in quasi-2D structures compared to 2D structures. Molecular dynamics simulations provide insights into mechanisms for suppressing diffusion.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Lina Shen, Peiquan Song, Lingfang Zheng, Lipeng Wang, Xiaguang Zhang, Kaikai Liu, Yuming Liang, Wanjia Tian, Yujie Luo, Jianhang Qiu, Chengbo Tian, Liqiang Xie, Zhanhua Wei
Summary: Perovskite solar cells (PSCs) with over 25% power conversion efficiency have been achieved through efficient surface passivation. However, current post-treatment strategies can only repair the defects at the top interface. In this study, an ion-diffusion management strategy is proposed to simultaneously modulate the top interfaces, buried interfaces, and bulk interfaces of the perovskite film, achieving passivation of all interface defects. By using double interactive salts of octylammonium iodide (OAI) and guanidinium chloride (GACl) on the 3D perovskite surface, the diffusion of ions can be controlled, resulting in a dimensionally broadened 2D capping layer. This approach leads to the formation of n-inter-i-inter-p five-layer structured PSCs with a champion PCE of 25.43% (certified 24.4%), and improved operational stability of perovskite solar cells.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Akriti, Enzheng Shi, Stephen B. Shiring, Jiaqi Yang, Cindy L. Atencio-Martinez, Biao Yuan, Xiangchen Hu, Yao Gao, Blake P. Finkenauer, Alan J. Pistone, Yi Yu, Peilin Liao, Brett M. Savoie, Letian Dou
Summary: The use of two-dimensional halide perovskites improves chemical stability and suppresses anionic diffusion in solid-state devices, leading to enhanced device performance. However, the role of organic cations in inhibiting anionic diffusion is not yet fully understood. Our quantitative investigation of anionic interdiffusion in atomically flat 2D vertical heterojunctions reveals a 'quantized' layer-by-layer diffusion model that provides important insights into the mechanism of anionic diffusion in 2D perovskites.
NATURE NANOTECHNOLOGY
(2021)
Article
Chemistry, Physical
Lifeng Wang, Dan Liu, Lu Jiang, Yuxi Ma, Guoliang Yang, Yijun Qian, Weiwei Lei
Summary: This study developed a series of advanced 2D-2D transition metal dichalcogenides and nitrogen-rich nitrides heterostructures for solar water evaporation, which exhibited excellent photothermal performance.
Article
Energy & Fuels
Jan Herterich, Clemens Baretzky, Moritz Unmuessig, Clement Maheu, Nico Glissmann, Jeremias Gutekunst, Georgios Loukeris, Thomas Mayer, Markus Kohlstaedt, Jan P. Hofmann, Uli Wuerfel
Summary: The use of phenetylammonium iodide (PEAI) as n-side passivation in p-i-n perovskite solar cells leads to a strong short-circuit current density (J(SC)) loss due to the inhomogeneity of the PEAI-based quasi-2D perovskite wide-bandgap interlayer. The reduction in internal quantum efficiency of PEAI-based devices is not caused by strong bulk doping or interface traps, but rather by limitations in charge extraction. A 2D drift-diffusion model with mobile ions and an inhomogeneous electron transport layer accurately reproduces the experimental behavior, highlighting the importance of suppressed non-radiative bulk recombination for efficient charge extraction and high open-circuit voltages in perovskite solar cells.
Article
Chemistry, Multidisciplinary
Louis Donald Notemgnou Mouafo, Florian Godel, Laurent Simon, Yannick J. Dappe, Walid Baaziz, Ulrich Nguetchuissi Noumbe, Etienne Lorchat, Marie-Blandine Martin, Stephane Berciaud, Bernard Doudin, Ovidiu Ersen, Bruno Dlubak, Pierre Seneor, Jean-Francois Dayen
Summary: This study presents a novel single electron transistor (SET) design using 2D materials and 0D nanoclusters, unveiling the concept of 0D-2D vertical SET. By combining the large Coulomb energy of nanoclusters with the electronic capabilities of 2D layer, efficient electric back gate control of nanocluster charge state is achieved.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Engineering, Environmental
Zhenkun Zhu, Jitao Shang, Guanqi Tang, Zhen Wang, Xiaxia Cui, Junjun Jin, Yuan Zhou, Xiang Zhang, Dan Zhang, Xiaowei Liu, Qidong Tai
Summary: This study demonstrates an effective strategy to grow high-quality perovskite films in high-humidity environment, resulting in significantly improved efficiency and stability of solar cells.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Xiaodan Yin, Wei Zheng, Haifeng Tang, Peigen Zhang, ZhengMing Sun
Summary: In this study, 1T-MoS2/Ti3C2Tz 2D/2D heterostructures were synthesized as new electrode materials through a simple hydrothermal method. The existence of heterojunctions was confirmed by XPS and TEM analysis. The heterostructures exhibited superior electrochemical performance in a water-in-salt electrolyte, with an optimized ratio of 1T-MoS2/Ti3C2Tz at 2:1, achieving a specific capacitance of 250 F g(-1), a capacitance retention of 82.3% after 5000 cycles, and an average coulombic efficiency of 99.96%. Assembled into symmetric supercapacitors, it achieved an energy density of 12.0 W h kg(-1) at a power density of 139.9 W kg(-1), with a capacitance retention of 82.6% and an average coulombic efficiency of 99.95% after 5000 cycles at 5 A g(-1). This research is expected to stimulate further studies on the wide application of 2D/2D heterostructures in supercapacitors.
Article
Chemistry, Multidisciplinary
Yang Li, Julie Roger, Isabel Allegro, Jan C. Fischer, Qihao Jin, Uli Lemmer, Ian A. Howard, Ulrich W. Paetzold
Summary: Planar heterostructures have been widely used in III-V semiconductor lasers but have not yet been explored for perovskite gain media. This study investigates the gain performance of a CsPbBr3(BABr)(x)/CsPbBr3 perovskite planar heterostructure fabricated by lamination. The results show that the heterostructure achieves low ASE threshold and lasing threshold, and modeling suggests that further improvement is possible by maximizing excited-state transfer efficiency. This study highlights the potential of perovskite planar heterostructures as high-performance gain media.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Xiaojun Zeng, Tianli Nie, Chao Zhao, Guozhen Zhu, Xiaozhen Zhang, Ronghai Yu, Galen D. Stucky, Renchao Che
Summary: The strong interaction between the matrix and the active centers plays a crucial role in the design of high-performance electromagnetic wave absorption materials. This study successfully designed a material with excellent electromagnetic wave absorption performance by constructing a strong interaction between CoAl-LDH matrix and CoFe-CoCx@NC centers. The experimental and theoretical results demonstrate the importance of material combination and structure in achieving high reflection loss and good matching performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Chemistry, Physical
Zhipeng Zhang, Sisi Wang, Xinfeng Liu, Yonghua Chen, Chenliang Su, Zikang Tang, Ying Li, Guichuan Xing
Summary: The combination of metal halide perovskites and 2D materials has shown significant progress in the field of photovoltaics, but challenges remain in improving performance and stability. Different fabrication techniques provide diversity for their assembly, while also offering opportunities for rational design.
Article
Chemistry, Physical
Yanqi Luo, Shuchen Zhang, Jia-Shiang Chen, Xuedan Ma, Ke Ma, Junjing Deng, Yi Jiang, Luxi Li, Barry Lai, Si Chen, Sarah Wieghold, Letian Dou
Summary: In this study, the degradation pathways of two-dimensional perovskite semiconductor materials under UV exposure were investigated using nano-XRF. The results showed that the loss of iodine was monotonically decreasing with increasing perovskite dimensionality, while bromine was relatively more stable, but diffused to the previously iodine-rich regime. Combining nano-XRF and XAS, it was found that crystals with dimensionality greater than 1 underwent structural reconfiguration after UV exposure.
Article
Nanoscience & Nanotechnology
Jingyan Liu, Yaxin Deng, Xiong He, Guangyao Liu, Xin Li
Summary: In this study, an air processing strategy is developed for efficient and stable perovskite solar cells (PSCs) based on 2D/3D heterostructures. An organic halide salt is used to construct the heterostructure, and a solvent is introduced to form an intermixed 2D/3D perovskite phase. This strategy improves the efficiency, stability, and carrier transport of the PSCs.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Multidisciplinary Sciences
Zeyu Zhang, Qingde Sun, Yue Lu, Feng Lu, Xulin Mu, Su-Huai Wei, Manling Sui
Summary: The authors report hydrogenated lead-free inorganic perovskite solar cells with enhanced power conversion efficiency. By using a hydrogenation method, the bandgap of Cs2AgBiBr6 films could be tunable from 2.18 eV to 1.64 eV, resulting in improved photoelectric conversion efficiency of the solar cells.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Wenhui Li, Xiaoyu Gu, Chengwei Shan, Xue Lai, Xiao Wei Sun, Aung Ko Ko Kyaw
Summary: The study introduces a localized Dion-Jacobson 2D-3D heterostructure to enhance the efficiency and stability of mesoscopic perovskite solar cells. The structure, with DJ 2D plates partially covering the surface of 3D perovskite, reduces charge transfer impedance and enhances moisture stability, resulting in improved performance of the cells.
Article
Chemistry, Multidisciplinary
Xin Wu, Danpeng Gao, Xianglang Sun, Shoufeng Zhang, Qi Wang, Bo Li, Zhen Li, Minchao Qin, Xiaofen Jiang, Chunlei Zhang, Zhuo Li, Xinhui Lu, Nan Li, Shuang Xiao, Xiaoyan Zhong, Shangfeng Yang, Zhong'an Li, Zonglong Zhu
Summary: In this study, a simple design strategy of polymer hole-transporting materials (HTMs) is reported, which can modulate the wettability and promote the anchoring by introducing pyridine units into the polyarylamine backbone, resulting in efficient and stable inverted perovskite solar cells (PVSCs).
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Danpeng Gao, Bo Li, Zhen Li, Xin Wu, Shoufeng Zhang, Dan Zhao, Xiaofen Jiang, Chunlei Zhang, Yan Wang, Zhenjiang Li, Nan Li, Shuang Xiao, Wallace C. H. Choy, Alex K. -Y. Jen, Shangfeng Yang, Zonglong Zhu
Summary: A highly efficient and stable flexible perovskite solar cell (PSC) is reported by modifying the interface between perovskite and hole transport layer using pentylammonium acetate (PenAAc) molecule. The PenAAc-modified PSC achieves a record power conversion efficiency (PCE) of 23.68% and shows excellent stability under mechanical bending.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
XinYu Yu, Danpeng Gao, Zhen Li, Xianglang Sun, Bo Li, Zonglong Zhu, Zhong'an Li
Summary: The commercialization of perovskite solar cells (PVSCs) requires the development of green-solvent processable dopant-free hole transporting materials (HTMs). A simple and effective design strategy of constructing star-shaped D-A-D structure has been proposed. The resulting HTMs (BTP1-2) can be processed by green solvent 2-methylanisole (2MA) and show high hole mobility and defect passivation effects, achieving an impressive efficiency of 24.34% for 2MA-processed BTP1 based inverted PVSCs, the highest value for green-solvent processable HTMs so far.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Yuniu Zhang, Jiawei Zheng, Zhengyan Jiang, Xinjun He, Jinwook Kim, Luhang Xu, Minchao Qin, Xinhui Lu, Aung Ko Ko Kyaw, Wallace C. H. Choy
Summary: Researchers demonstrate a facile approach of introducing pre-located Ag nanoparticles (NPs) with optimized ligands to form high-performance transparent electrodes. This approach not only guides the growth of evaporated Ag clusters to form high-quality transparent electrodes, but also reduces mis-stacking defects of the electron transport layer and improves carrier transportation/extraction. By using this method, a semi-transparent organic solar cell achieves a remarkable power conversion efficiency of 12.80% and provides potential for practical applications.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Shichen Yuan, Tao Fang, Jing Huang, Xiansheng Li, Changting Wei, Yihui Zhou, Yan Li, Xin Zheng, Jinhai Huang, Jianhua Su, Glib Baryshnikov, Wallace C. H. Choy, Haibo Zeng, Bo Xu
Summary: Researchers have developed a high-mobility electron-transporting material B2 to balance charge injection in blue perovskite quantum dot light-emitting diodes (Pe-QLEDs), leading to improved device performance and stability.
ACS ENERGY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Jiayun Sun, Zhenwei Ren, Zhaojin Wang, Haoran Wang, Dan Wu, Xiao Wei Sun, Wallace C. H. Choy, Kai Wang
Summary: A facile ionic liquid post-treatment technique is used to modify the solution-processed quasi-2D perovskite film, which enhances the radiative recombination efficiency and the photoluminescence quantum yield of the film. It also improves the hole injection and the external quantum efficiency of the blue PeLED.
ADVANCED OPTICAL MATERIALS
(2023)
Review
Chemistry, Physical
Xin Wu, Dong Zhang, Xue Wang, Xiaofen Jiang, Baoze Liu, Bo Li, Zhen Li, Danpeng Gao, Chunlei Zhang, Yan Wang, Zonglong Zhu
Summary: With the improvement in power conversion efficiency and lifetime of perovskite solar cells (PVSCs), the environmental concerns regarding materials, device processing, operation, and recycling have become crucial for their commercialization. The development of eco-friendly PVSCs through lead-free perovskite materials, non-toxic solvents, and effective lead-adsorbing materials has gained significant attention in the past few years. This comprehensive review discusses the recent progress in eco-friendly PVSCs, including eco-friendly materials, device processing and operation, and perovskite recycling, while providing insights into further material innovation and device optimization for future development.
Article
Multidisciplinary Sciences
Zhenyu Shi, Xiao Zhang, Xiaoqian Lin, Guigao Liu, Chongyi Ling, Shibo Xi, Bo Chen, Yiyao Ge, Chaoliang Tan, Zhuangchai Lai, Zhiqi Huang, Xinyang Ruan, Li Zhai, Lujiang Li, Zijian Li, Xixi Wang, Gwang-Hyeon Nam, Jiawei Liu, Qiyuan He, Zhiqiang Guan, Jinlan Wang, Chun-Sing Lee, Anthony R. J. Kucernak, Hua Zhang
Summary: Crystal phase is a crucial factor that determines the properties and functions of two-dimensional transition-metal dichalcogenides (TMDs). In this study, MoS2 nanosheets with high phase purity were synthesized, and it was found that the 2H-phase template facilitated the epitaxial growth of Pt nanoparticles, while the 1T' phase supported single-atomically dispersed Pt atoms. This research provides valuable insights into the relationship between crystal phase and catalyst development.
Article
Biochemical Research Methods
Wenbin Wang, Junlei Qi, Zongxiao Wu, Wei Zhai, Yanghang Pan, Kai Bao, Li Zhai, Jingkun Wu, Chengxuan Ke, Lingzhi Wang, Mengning Ding, Qiyuan He
Summary: This article introduces the critical concepts, experimental standardization, operational principles, and data analysis for using on-chip electrocatalytic microdevices (OCEMs). OCEMs are emerging as a specialized electrochemical platform for investigating nanocatalysts at the microscopic level. This protocol provides standard protocols for measurement and validation of electrocatalytic reactions of nanosheets, as well as discussing factors that could affect measurement accuracy. It also details a protocol for in situ electrical transport measurement, showcasing the adaptability of OCEMs. Overall, this protocol aims to promote the adoption and further development of the OCEM platform.
Article
Biochemical Research Methods
Shengqi Wang, Junying Xue, Dong Xu, Jing He, Yongping Dai, Tingyi Xia, Yu Huang, Qiyuan He, Xiangfeng Duan, Zhaoyang Lin
Summary: Electrochemical molecular intercalation and ultrasonic exfoliation can effectively produce organic/inorganic hybrid superlattices and solution-processable 2D semiconductors. Organic alkylammonium cations are used for intercalation, resulting in distinct intercalation and exfoliation chemistry. The exfoliated nanosheets can be modified and have tunable physical/chemical properties. The protocol takes about 6 hours for stable nanosheet dispersion and additional 11 hours for thin film deposition and transfer, and does not require expertise beyond basic electrochemistry knowledge.
Article
Materials Science, Multidisciplinary
Guanding Mei, Xiangtian Xiao, Sajjad Ahmad, Hong Lin, Yangzhi Tan, Kai Wang, Xiao Wei Sun, Wallace C. H. Choy
Summary: This study demonstrates the importance of microcavity design for improving the light extraction efficiency of Perovskite light-emitting diodes (PeLEDs). The experiment shows that a high-efficiency horizontal dipole in the microcavity is the key to improving the efficiency.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Huide Wang, Haoxin Huang, Jiajia Zha, Yunpeng Xia, Peng Yang, Yonghong Zeng, Yi Liu, Rui Cao, Bing Wang, Wei Wang, Long Zheng, Ye Chen, Qiyuan He, Xing Chen, Ke Jiang, Ja-Hon Lin, Zhe Shi, Johnny C. Ho, Han Zhang, Chaoliang Tan
Summary: A tellurium (Te)-based infrared photodetector is reported with a specifically designed asymmetric electrical contact area, achieving low dark current and high sensitivity at room temperature.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Bo Li, Zhen Li, Danpeng Gao, Xin Wu, Xintong Li, Chunlei Zhang, Shuai Li, Jianqiu Gong, Dong Zhang, Xiangfan Xie, Shuang Xiao, Haipeng Lu, Mingjie Li, Zonglong Zhu
Summary: By designing long-chain alkylamines as crystallization buffer molecules, the residual strain in tin perovskite films was released, thus improving the photovoltaic performance and stability of lead-stabilized tin perovskite solar cells (TPSCs).
MATERIALS CHEMISTRY FRONTIERS
(2023)
