Article
Chemistry, Multidisciplinary
Zhuo Chen, Lvming Dong, Cheng Zhou, Binze Zhou, Zhi Zheng, Rong Chen, Jianfeng Zang
Summary: This study reports a moderate-temperature and atmospheric approach to synthesize highly luminescent Mn-doped CsPbCl3 nanoplatelets with only 4 monolayers. The nanoplatelets exhibit a high photoluminescence quantum yield and excellent stability for over 60 days at room temperature, enabling the first achievement of orange-red and warm white light-emitting diodes (LEDs) with prominent potential in flexible displays.
Article
Chemistry, Physical
Dengfeng Luo, Sirui Yang, Qing Zhang, Limei Cha, Li Dang, Ming-De Li
Summary: This study demonstrates a new strategy to tune the optical properties of Mn-doped CsPbCl3 nanocrystals by adjusting the concentration of ligands, showing successful control of dual-color emission while revealing the involvement of mediated traps in the host-to-dopant internal energy-transfer process.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Jonathan M. Wong, Jie Xu, Ruizhong Zhang, Kenneth Chu, Zhifeng Ding, Lijia Liu
Summary: The electrochemiluminescence (ECL) of Mn-doped CsPbCl3 perovskite quantum dot (MPQ) films was investigated for the first time, revealing the presence of two emission peaks, one from Mn2+ d-d transition and the other originating from surface states, differing from the frequently reported photoluminescence (PL) of MPQ. The study also found that the presence of the 660 nm peak in the ECL of undoped CsPbCl3 (UPQ) further supports the proposed surface-state emission scheme.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Min Zeng, Federico Locardi, Dimitrije Mara, Zeger Hens, Rik Van Deun, Flavia Artizzu
Summary: A general strategy was proposed to enable intense near-infrared emission from Er3+, Ho3+, and Nd3+ lanthanide ions through a Mn2+-mediated energy-transfer pathway, with energy-transfer efficiencies and photoluminescence quantum yields obtained. This work provides guidance on constructing energy-transfer pathways in semiconductors and opens new perspectives for lanthanide-functionalized lead halide perovskites in optoelectronic devices operating in the NIR region.
Article
Materials Science, Multidisciplinary
Wenjia Wang, Pu Luo, Ying Wei, Yuanchao Ji, Chang Liu, Xiaobing Ren
Summary: The study focuses on the characteristics and properties of a spinodal strain glass alloy Mn60Cu40, which exhibits a transition from strain glass to normal martensite with aging. The spinodal strain glass shows non-magnetic Elinvar behavior and high damping capacity. The findings suggest that spinodal strain glasses and their novel properties may also be found in other metallic and ceramic spinodal materials.
Article
Chemistry, Multidisciplinary
Kaliyamoorthy Justice Babu, Ayushi Shukla, Gurpreet Kaur, Arshdeep Kaur, Himanshu Bhatt, Hirendra N. Ghosh
Summary: A temperature dependent transient absorption study reveals that at low temperature, charge transfer is suppressed by trapping of charge carriers in defect states, while at high temperature, thermally active carriers de-trap from defect states, leading to an efficient charge/energy transfer process.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Manushi J. Patel, Dhara Raval, Sanjeev K. Gupta, P. N. Gajjar
Summary: The DFT analysis of cubic phase CsPbCl3 perovskite shows that both bulk and monolayer structures are dynamically stable. Doping with Mn and Nb results in shifted absorption edges towards lower photon energy, leading to improved efficiency in solar cells. The Nb-doped monolayer achieves a J(sc) of 655.45 A/m(2) and an efficiency of 15.68%, while the Mn-doped monolayer shows a J(sc) of 525.68 A/m(2) and a high efficiency of 26.88%, making it a promising candidate for solar cell applications.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Physical
Hao Jiang, Yiting Zhao, Fangchao Liu, Yongqi Yan, Yinuo Ma, Hexin Bao, Zhongchen Wu, Wei-Yan Cong, Ying-Bo Lu
Summary: To investigate the effect of Mn and other metal dopants on the photoelectronic performance of CsPbCl3 perovskites, a series of theoretical analyses were conducted. The findings showed that Mn mono-doping resulted in a more compact structure of the metal octahedral cage and reduced lattice strain and energy of the entire lattice. Co-doping with Ni, Fe, and Co dopants significantly increased the solubility of Mn dopant and reduced the band gap. Strengthening the CsPbCl3 lattice and reducing intrinsic defects enhanced stability and PL properties, while increasing Mn solubility and decreasing the bandgap enhanced the PLQY of orange luminescence.
Article
Physics, Fluids & Plasmas
Rajiv G. Pereira
Summary: Studied the steady states and coarsening dynamics in a one-dimensional driven nonconserved system, derived equations of motion for phase boundaries in a phase ordering system, explored kink interactions, and analyzed scaling of average domain size with time using numerical techniques.
Article
Physics, Condensed Matter
Le Huang, Lingting Song, Yibin Yang, Ye Xiao, Shanshan Chen, Huafeng Dong, Fugen Wu
Summary: This theoretical study investigates the effect of Mn concentration on the luminescence behavior of Mn-doped perovskite CsPbCl3. The results show an abnormal variation in the host photoluminescence peak with increasing Mn concentration. The blue-shift and subsequent red-shift in the host bandgap are attributed to the reduced antibonding between Pb s and Cl p orbitals atoms by Mn substituting Pb and the shortened Pb-Cl bonds, respectively. This work provides further insight into the fundamental strategy of Mn doping for improving luminescence performance in perovskite-based light-emitting devices.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Physical
Dinabandhu Patra, Ayesha Hashmi, Surya Prakash Singh
Summary: This study aimed to improve the luminescence and long-term durability of manganese-doped CsPbCl3 nanocrystals through ascorbic acid treatment to overcome the defects. The results showed that the ascorbic acid-treated nanocrystals exhibited good ambient stability and photostability.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Dinabandhu Patra, Surya Prakash Singh
Summary: The metal doping strategy reduces the defect/trap states and improves the stability of CsPbCl3. Post-synthesis surface passivation with BPY improves the energy transfer properties, relative PLQY, and stability of Mn-doped CsPbCl3 PNCs.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Hye Min Seo, Seulwoo Kim, Sangwoo Kwon, YongJoo Kim, Minchul Sung, Jongryeol Yang, Boryeong Lee, Jongbaek Sung, Min -Ho Kang, Jungwon Park, Kyounghee Shin, Won Bo Lee, Jin Woong Kim
Summary: A smart polymer laminate film system with direction-controlled phase separation behavior was developed in this study, where liquid nanodrops were uniformly confined in a polymer laminate film through the layer-by-layer deposition of oppositely charged emulsion nanodrops and polyelectrolytes.
Article
Materials Science, Multidisciplinary
Li Zhuang, Xin Zhang, Junliang Zhang, Qinghui Jin, Jiawen Jian, Xiaowei Zhang
Summary: The introduction of a PMMA thin film structure successfully reduced the reabsorption between different PNCs and increased the Stokes shift of PNCs. The thin PMMA film with Mn-doped PNCs demonstrated excellent stability in emission wavelength under different PMMA ratios and temperatures.
Article
Materials Science, Ceramics
Ya Chen, Linli Shen, Jianming Liu, Xiaojuan Liang, Weidong Xiang
Summary: The research indicates that Mn-doped CsPbCl3 perovskite nanocrystal glass has great potential in the field of plant cultivation LEDs, meeting the light requirements for plant growth and promoting growth speed compared to commercial LED technologies.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Xiang-Bing Fan, Shan Yu, Xian Wang, Zhi-Jun Li, Fei Zhan, Jia-Xin Li, Yu-ji Gao, An-Dong Xia, Ye Tao, Xu-Bing Li, Li-Ping Zhang, Chen-Ho Tung, Li-Zhu Wu
ADVANCED MATERIALS
(2019)
Article
Chemistry, Physical
Andrew H. Davis, Elan Hofman, Kevin Chen, Zhi-Jun Li, Alex Khammang, Hediyeh Zamani, John M. Franck, Mathew M. Maye, Robert W. Meulenberg, Weiwei Zheng
CHEMISTRY OF MATERIALS
(2019)
Article
Chemistry, Multidisciplinary
Yucheng Yuan, Hua Zhu, Yasutaka Nagaoka, Rui Tan, Andrew Hunter Davis, Weiwei Zheng, Ou Chen
FRONTIERS IN CHEMISTRY
(2019)
Article
Chemistry, Physical
Katie Marie Hills-Kimball, Maria Jesus Perez, Yasutaka Nagaoka, Tong Cai, Hanjun Yang, Andrew Hunter Davis, Weiwei Zheng, Ou Chen
CHEMISTRY OF MATERIALS
(2020)
Article
Chemistry, Physical
Liping Man, Quanlong Xu, Wenhao Li, Wei Chen, Weiwei Zheng, De-Kun Ma
APPLIED SURFACE SCIENCE
(2020)
Article
Chemistry, Physical
Zhi-Jun Li, Shuya Li, Andrew Hunter Davis, Elan Hofman, Gyu Leem, Weiwei Zheng
Article
Chemistry, Physical
Elan Hofman, Alex Khammang, Joshua T. Wright, Zhi-Jun Li, Peter Francis McLaughlin, Andrew Hunter Davis, John Mark Franck, Arindam Chakraborty, Robert W. Meulenberg, Weiwei Zheng
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2020)
Article
Chemistry, Applied
Andrew Hunter Davis, Weiwei Zheng
Summary: Metal halide perovskite nanocrystals demonstrate impressive optical and electronic properties with potential applications in solar cells and other fields. In addition to zero-dimensional structures, low-dimensional perovskites with directionally relevant quantum confinement are also studied. The focus is on the synthetic progress and discrete composition control of 2D all-inorganic metal halide perovskite NCs.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Shuya Li, Hanjie Lin, Chun Chu, Chandler Martin, Walker Macswain, Robert W. Meulenberg, John M. Franck, Arindam Chakraborty, Weiwei Zheng
Summary: A simple method has been developed to fabricate lead-free/core-shell nanocrystals with enhanced environmental stability and improved photoluminescence quantum yields. The resulting nanocrystals exhibit tunable photoluminescence colors due to B-site ion diffusion at the core/shell interface, which further optimizes the optical properties.
Article
Chemistry, Multidisciplinary
Chun Chu, Elan Hofman, Chengpeng Gao, Shuya Li, Hanjie Lin, Walker Macswain, John M. Franck, Robert W. Meulenberg, Arindam Chakraborty, Weiwei Zheng
Summary: Diffusion and migration of atoms or ions in solid crystalline lattice play a crucial role in solid-state technology. However, it is challenging to control ion diffusion and migration in nanoscale lattices. In this study, an atomic trap consisting of a CdZnS alloyed interface layer was intentionally inserted to facilitate directional dopant migration inside core/multi-shell quantum dots (QDs). The research found that the initial doping site/environment is crucial for efficient dopant trapping and migration. Density functional theory calculations revealed that the energy barrier of dopant hopping is higher when occupying a smaller substitutional site. This controlled dopant migration provides a new approach to fine-tune the properties of doped nanomaterials.
Article
Materials Science, Multidisciplinary
Andrew H. Davis, Shuya Li, Hanjie Lin, Chun Chu, John M. Franck, Gyu Leem, Mathew M. Maye, Weiwei Zheng
Summary: The study presents a facile ligand-mediated synthesis method for preparing high-quality 2D CsPbX3 nanoplatelets with impressive optoelectronic properties. This versatile method can also be used to synthesize Mn-doped CsPbX3 nanoplatelets, showing increased emission efficiency with higher concentrations of Mn and Cl. The reaction, carried out in toluene under ambient conditions, offers a promising approach for industrial applications due to its simplicity and scalability.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Zhi-Jun Li, Shuya Li, Elan Hofman, Andrew Hunter Davis, Gyu Leem, Weiwei Zheng