Article
Chemistry, Multidisciplinary
Pratap Vishnoi, Julia L. Zuo, Xiaotong Li, Devesh Chandra Binwal, Kira E. Wyckoff, Lingling Mao, Linus Kautzsch, Guang Wu, Stephen D. Wilson, Mercouri G. Kanatzidis, Ram Seshadri, Anthony K. Cheetham
Summary: This study reports a new type of hybrid layered double perovskite (HLDP) halides whose optical band gaps can be tuned by the layer composition, and the magnetic behavior is related to the material's composition.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Inorganic & Nuclear
Hang Ruan, Zhongnan Guo, Jiawei Lin, Kunjie Liu, Lingling Guo, Xin Chen, Jing Zhao, Quanlin Liu, Wenxia Yuan
Summary: The study reports the synthesis of three new Pb-free hybrid-layered-double perovskites and analyzes their optoelectronic properties, providing a new approach for the development of this type of semiconductor materials.
INORGANIC CHEMISTRY
(2021)
Review
Materials Science, Multidisciplinary
Hayden A. Evans, Lingling Mao, Ram Seshadri, Anthony K. Cheetham
Summary: The article discusses the successful strategies for designing crystalline materials, focusing on systematically tuning the chemical composition. Perovskites, particularly the layered double perovskites, provide a vast range of functionality through slicing and restacking the perovskite structure with ordered cations and/or anions. The emerging area of hybrid LDPs is particularly rich, leading to exciting discoveries of new compounds with unique structures and fascinating optoelectronic properties.
ANNUAL REVIEW OF MATERIALS RESEARCH, VOL 51, 2021
(2021)
Article
Nanoscience & Nanotechnology
Priyesh Yadav, Swati Khurana, Sameer Sapra
Summary: This study demonstrates for the first time the successful doping of Mn2+ in hybrid inorganic-organic 2D LDPs, (BA)(4)AgBiBr8, via a simple solid-state mechanochemical route. The doped 2D LDP shows energy transfer from host excitons to d-electrons of Mn2+ ions, resulting in a red-shifted Mn2+ emission band centered at 625 nm.
Review
Materials Science, Multidisciplinary
Jovana V. Milic
Summary: Layered hybrid perovskites (LHPs) have emerged as attractive materials in optoelectronics due to higher environmental and operational stabilities compared to their metal-halide perovskite analogues. However, the functionality of LHPs is highly dependent on their orientation, making it challenging to control and compromising their performances. Efforts to enhance the functionality of LHPs by introducing semiconductive organic moieties and chiral moieties have led to the development of multifunctional LHPs.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Physical
M. S. K. K. Y. Nartu, S. Dasari, A. Sharma, V Chaudhary, S. M. Varahabhatla, S. A. Mantri, E. Ivanov, R. Ramanujan, N. B. Dahotre, R. Banerjee
Summary: BCC Fe-Co alloys are important soft magnetic materials, but processing challenges arise due to the formation of hardening ordered B2 phase. Additive manufacturing technologies, such as laser engineered net shaping, can control the extent of B2 ordering, thus affecting the magnetic properties of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Algirdas Ducinskas, Gee Yeong Kim, Davide Moia, Alessandro Senocrate, Ya-Ru Wang, Michael A. Hope, Aditya Mishra, Dominik J. Kubicki, Milosz Siczek, Wojciech Bury, Thomas Schneeberger, Lyndon Emsley, Joachim Maier, Jovana Milic, Michael Gratzel
Summary: While layered hybrid halide perovskites are generally believed to be more stable in humid conditions, this study reveals that the structure of Dion-Jacobson-type perovskites can be disrupted under such conditions. The original structure can be restored through annealing, and the hydration can be suppressed by generating a self-protective layer of PbI2.
ACS ENERGY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Masaud Almalki, Algirdas Ducinskas, Loi C. Carbone, Lukas Pfeifer, Laura Piveteau, Weifan Luo, Ethan Lim, Patricia A. Gaina, Pascal A. Schouwink, Shaik M. Zakeeruddin, Jovana Milic, Michael Gratzel
Summary: Layered hybrid perovskites with organic spacers between perovskite slabs were synthesized using arene and perfluoroarene moieties. The resulting materials showed the formation of layered perovskite phases and exhibited nanoscale segregation and enhanced stability in humid environments.
Article
Chemistry, Inorganic & Nuclear
Jia-Qi Gan, Zhe-Kun Xu, Tian Gan, Yan Qin, Zhong-Xia Wang
Summary: A record T (tr) enhancement of 148 K by H/F substitution has been achieved in a layered lead iodide hybrid crystal. This finding has significant implications for the rational design of functional materials with high performance. The H/F substitution strategy increases the motion barrier for the order-disorder transition, resulting in the improved T (tr) in the crystal.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Yu. G. Pashkevich, E. L. Fertman, A. V. Fedorchenko, D. E. L. Vieira, C. S. Neves, R. Yu. Babkin, A. A. Lyogenkaya, R. Tarasenko, V. Tkac, E. Cizmar, A. Feher, A. N. Salak
Summary: The low-temperature heat capacity and the magnetisation of Co2+n Al3+ layered double hydroxides (LDH) were studied with different anions in magnetic fields up to 50 kOe. A Schottky-like anomaly was observed in the temperature dependence of the heat capacity below 10 K, caused by the splitting of the ground-state Kramers doublet of Co2+ and correlated with magnetic ordering in LDH. The magnetic susceptibility peak and heat capacity anomaly were more pronounced for Co2Al LDH with n = 2 than for Co3Al LDH with n = 3.
APPLIED CLAY SCIENCE
(2023)
Review
Chemistry, Multidisciplinary
Jovana Milic, Shaik M. Zakeeruddin, Michael Graetzel
Summary: Hybrid halide perovskite materials are leading candidates for optoelectronic applications, but face issues such as thermal and environmental instability. Recent research has shown that layered two-dimensional perovskite phases are more stable and have better resistance to gas and ion migration compared to other forms.
ACCOUNTS OF CHEMICAL RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Ze-Jie Wang, Long-He Li, Yan Feng, Qin-Wen Wang, Ling-Kun Wu, Jian-Rong Li, Heng-Yun Ye
Summary: Two new organic-inorganic hybrid double perovskites exhibit phase transitions and switchable dielectric constants, as well as attractive photoluminescence and paramagnetic behavior. These compounds may serve as excellent candidates for multifunctional intelligent materials, providing a new pathway for the development of multifunctional materials.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Kunlang Ji, Khalid N. Alharbi, Elena Solana-Madruga, Gessica T. Moyo, Clemens Ritter, J. Paul Attfield
Summary: Controlling cation ordering in perovskites is crucial for their structural, physical, and chemical properties. Under pressure, thermal transformations can achieve fully disordered cations in double perovskites, leading to a switch in magnetic properties. Comparing different polymorphs of materials can help explore the effects of cation order and disorder on properties like ferroelectricity and conductivity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Loreta A. Muscarella, Algirdas Ducinskas, Mathias Dankl, Michal Andrzejewski, Nicola Pietro Maria Casati, Ursula Rothlisberger, Joachim Maier, Michael Graetzel, Bruno Ehrler, Jovana Milic
Summary: Layered Dion-Jacobson (DJ) and Ruddlesden-Popper (RP) hybrid perovskites with modular structure are promising for optoelectronic applications. By using mechanical stimuli, their properties can be controlled without changing the composition. This study investigates the structure-property relationships of DJ and RP 2D perovskites under hydrostatic pressure and reveals the changes in lattice and optical properties. Surprisingly, RP and DJ perovskites behave similarly under pressure despite the different spacer molecules. The manipulation of crystal structure affects the optoelectronic properties, and the reversibility of their response expands future application prospects.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Chunli Zhao, Yuan Gao, Jianbei Qiu
Summary: This paper reports the synthesis of two-dimensional layered double perovskites from halide perovskites as precursors. By introducing Mn2+ into the perovskite, different light emission colors were achieved. It was found that high concentrations of Cd2+ in the perovskite can suppress nonradiative decay and promote efficient energy transfer.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Andrew Comstock, Melike Biliroglu, Dovletgeldi Seyitliyev, Aeron McConnell, Eric Vetter, Pramod Reddy, Ronny Kirste, Dennis Szymanski, Zlatko Sitar, Ramon Collazo, Kenan Gundogdu, Dali Sun
Summary: Recent research has shown that integrating semiconductors into spintronic THz emitters allows for control over terahertz radiation through ultrafast demagnetization dynamics. The study found that the Schottky barrier in ultrawide bandgap (UWBG) semiconductors can increase the polarization of the spin current injected from the ferromagnet, while the two-dimensional electron gas at the interface between Al0.25Ga0.75N and GaN enhances the magnitude of the emitted radiation.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Hao-Pu Xue, Rui Sun, Xu Yang, Andrew Comstock, Yangrui Liu, Binghui Ge, Jia-Nan Liu, Yan-Sheng Wei, Qing-Lin Yang, Xue-Song Gai, Zi-Zhao Gong, Zong-Kai Xie, Na Li, Dali Sun, Xiang-Qun Zhang, Wei He, Zhao-Hua Cheng
Summary: Dual topological superlattices (TSLs) Bi2Se3-(Bi-2/Bi2Se3)(N) with limited stacking layer number N are constructed, in which the coexistence and adjustment of dual topological surface states are identified. The spin-polarized dual-topological bands exhibit an unconventionally weak antilocalization effect and circularly and linearly polarized photogalvanic effect. These findings shed light on engineering design for opto-electronic/spintronic applications.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Tanglue Feng, Weihua Chen, Jie Xue, Fangfang Cao, Zhongwei Chen, Jichun Ye, Chuanxiao Xiao, Haipeng Lu
Summary: In this study, a new type of amorphous chiral tartaric acid-FeNi coordination polymer was fabricated by electrodeposition methods, showing both high spin-polarization and high electrocatalytic activity for oxygen evolution. Circular dichroism measurements revealed the optical activity of the coordination polymer. Conductive atomic force microscopy measurements demonstrated the high spin polarization of the chiral electrocatalyst, which effectively reduced the formation of hydrogen peroxide byproducts compared to achiral ones. These chiral Fe-Ni electrocatalysts exhibited a low overpotential of 205 and 280 mV to achieve 10 and 100 mA cm(-2), respectively.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Congcong Chen, Xin Zhao, Yaping Gong, Yang Liu, Zhongwei Chen, Luming Zhang, Jian Chen, Zeyu Deng, Haipeng Lu, Min Luo, Pieremanuele Canepa, Lingling Mao
Summary: This study reports a new family of hybrid 2D Ge-based perovskites with excellent optical properties and structural diversity. The Ge-based iodide perovskites exhibit good second-harmonic generation (SHG) responses, providing new strategies for the design of lead-free alternatives.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Kyunghoon Kim, Eric Vetter, Liang Yan, Cong Yang, Ziqi Wang, Rui Sun, Yu Yang, Andrew H. Comstock, Xiao Li, Jun Zhou, Lifa Zhang, Wei You, Dali Sun, Jun Liu
Summary: Researchers have discovered that chiral phonons in non-magnetic materials can generate spin currents in response to a thermal gradient, without the need for ferromagnetic contacts. This finding suggests the potential application of chiral phonons in spin caloritronics and offers a new route for spin generation in the absence of magnetic materials.
Article
Multidisciplinary Sciences
Andrew H. Comstock, Chung-Tao Chou, Zhiyu Wang, Tonghui Wang, Ruyi Song, Joseph Sklenar, Aram Amassian, Wei Zhang, Haipeng Lu, Luqiao Liu, Matthew C. Beard, Dali Sun
Summary: Recently there has been interest in exploring the coupling between magnons for use in information processing, however, this is hampered by the fact that such coupling is forbidden due to the different parity of the acoustic and optical magnons. Here, Comstock et al show that the interlayer Dzyaloshinskii-Moriya-Interaction in a layered hybrid antiferromagnet can allow for strong coupling between the acoustic and optical magnons, offering a pathway for magnon coherent information processing.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Qinxuan Cao, Ruyi Song, Christopher C. S. Chan, Zhiyu Wang, Pui Ying Wong, Kam Sing Wong, Volker Blum, Haipeng Lu
Summary: Chiral perovskite nanocrystals with precise control of layer thickness and chiral surface ligands exhibit tunable circular dichroism (CD) and circularly polarized luminescence (CPL) responses. Chirality transfer is found to decrease in thicker nanocrystals, leading to decreased CD and CPL dissymmetry factors. Large-scale first-principles calculations suggest that chirality transfer is mediated through surface distortion rather than electronic state hybridization, resulting in symmetry breaking and spin-split conduction bands.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ankit Negi, Alejandro Rodriguez, Xuanyi Zhang, Andrew H. H. Comstock, Cong Yang, Dali Sun, Xiaoning Jiang, Divine Kumah, Ming Hu, Jun Liu
Summary: In this study, the thermal conductivity and phonon mean free path (MFP) distribution of barium titanate (BTO) were determined through experimental measurements and first-principles modeling. The results show that phonons with sub-100 nm MFP dominate the thermal transport in BTO, and phonons with MFP exceeding 10 nm contribute approximately 35% to the total thermal conductivity. These findings are consistent with the theoretical predictions of other crystals with strong anharmonicity.
Article
Physics, Applied
Qichao Tian, Ziyu Wang, Wei-Min Zhao, Yong-Jie Xu, Gan Liu, Li Wang, Pengdong Wang, Li-Guo Dou, Wang Chen, Shaoen Jin, Junyu Zong, Qinghao Meng, Fan Yu, Can Wang, Xiaoxiang Xi, Fang-Sen Li, Shao-Chun Li, Junwei Liu, Yi Zhang
Summary: This study reports the growth of 1T' phase WS2 monolayer on the SrTiO3 (001) substrate using molecular beam epitaxy. Surprisingly, a large bandgap of 0.65 eV is revealed, which is abnormally larger than the theoretical expectance. Moreover, an additional near-flatband emerges in the grown monolayer 1T'-WS2, suggesting the effect of interfacial interactions.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Jie Xue, Yuling Huang, Yang Liu, Zhongwei Chen, Herman H. -Y. Sung, Ian D. Williams, Zonglong Zhu, Lingling Mao, Xihan Chen, Haipeng Lu
Summary: Non-covalent interactions, such as hydrogen bonding and halogen bond interaction, play a crucial role in the self-assembly of hybrid organic-inorganic crystals. The strength of halogen bond varies with the layer thickness, leading to different structural symmetries. The asymmetric structures in these perovskites result in enhanced Rashba band splitting effect and reversible bulk photovoltaic effect, enabling hybrid perovskites with emerging properties and functionalities.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Chen Sun, Zeyu Deng, Zhiyuan Li, Zhongwei Chen, Xuanyu Zhang, Jian Chen, Haipeng Lu, Pieremanuele Canepa, Rui Chen, Lingling Mao
Summary: Hybrid organic-inorganic antimony halides with high photoluminescence quantum yield (PLQY) have gained attention for their non-toxicity and stability. Five pairs of antimony halides with different structures were synthesized and characterized to investigate the factors contributing to high PLQY. The antimony halides with square pyramidal geometry exhibited near-unity PLQY, while those with seesaw dimmer geometry showed PLQY close to 0%. The longer Sb center dot center dot center dot Sb distances in the square pyramidal structures and other factors such as Sb-Cl distance and stability of antimony chlorides may influence PLQY. The findings provide valuable insights for the precise design of highly emissive materials in optoelectronic applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Physics, Multidisciplinary
Yi Li, Timothy Draher, Andrew H. Comstock, Yuzan Xiong, Md Azimul Haque, Elham Easy, Jiangchao Qian, Tomas Polakovic, John E. Pearson, Ralu Divan, Jian-Min Zuo, Xian Zhang, Ulrich Welp, Wai-Kwong Kwok, Axel Hoffmann, Joseph M. Luther, Matthew C. Beard, Dali Sun, Wei Zhang, Valentine Novosad
Summary: This work probes the intrinsic magnon band gap of a layered hybrid perovskite antiferromagnet by coupling it to a superconducting resonator. The temperature tunability of the band gap allows for control of the photon mode within the gap, leading to a reduction in effective magnon-photon coupling and the disappearance of magnon-photon hybridization. The quantification of the magnon band gap is achieved by analyzing the increase in resonator damping rate when the resonator mode falls into the gap.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Tonghui Wang, Ruipeng Li, Hossein Ardekani, Lucia Serrano-Lujan, Jiantao Wang, Mahdi Ramezani, Ryan Wilmington, Mihirsinh Chauhan, Robert W. Epps, Kasra Darabi, Boyu Guo, Dali Sun, Milad Abolhasani, Kenan Gundogdu, Aram Amassian
Summary: This research demonstrates the use of the RoboMapper platform to accelerate materials research, allowing high-throughput measurements and efficient generation of quantitative structure-property relationships. By constructing QSPR maps for halide perovskites, alloy compositions suitable for perovskite-Si hybrid tandem solar cells with superior stability are identified.
