Article
Materials Science, Multidisciplinary
Jiaqi Yang, Arun Mannodi-Kanakkithodi
Summary: Halide perovskites have attracted considerable interest in various applications due to their tunability and high-throughput computational methods based on density functional theory have been used to discover novel materials with desired properties.
Article
Nanoscience & Nanotechnology
Wenguang Hu, Lei Zhang, Zheng Pan
Summary: This study investigates the ion adsorption on two-dimensional halide perovskites using high-throughput calculations and machine learning analysis. The Xgboost algorithm achieved the highest accuracy in predicting a virtual design space consisting of various ion/perovskite systems. The selected stable lead-free ion/perovskite systems with suitable band gaps and halogen mixing features provide a theoretical foundation for ion-based energy storage applications.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Multidisciplinary Sciences
Yicheng Zhao, Jiyun Zhang, Zhengwei Xu, Shijing Sun, Stefan Langner, Noor Titan Putri Hartono, Thomas Heumueller, Yi Hou, Jack Elia, Ning Li, Gebhard J. Matt, Xiaoyan Du, Wei Meng, Andres Osvet, Kaicheng Zhang, Tobias Stubhan, Yexin Feng, Jens Hauch, Edward H. Sargent, Tonio Buonassisi, Christoph J. Brabec
Summary: The stability of perovskite-based photovoltaics is still a topic that needs more attention. Recent research reveals that the impact of cations on perovskite stability may reverse at temperatures below 100 degrees Celsius, compared to accelerated ageing tests at higher temperatures.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Yang Zhou, Tengyue He, Peng Yuan, Jun Yin, Shulin Chen, Luis Gutierrez-Arzaluz, Lijie Wang, Osman M. Bakr, Omar F. Mohammed
Summary: Copper halide clusters have garnered attention in light-emitting diodes and optical sensors due to their unique physicochemical properties and diverse chemical structures. Recently, they have also been explored as promising scintillation materials because of their large absorption cross section for X-ray radiation. However, research on copper halide cluster scintillators is still in its early stages and their performance lags behind that of perovskite and its related metal halide structures.
ACS MATERIALS LETTERS
(2023)
Article
Optics
Jian-Xin Wang, Luis Gutierrez-Arzaluz, Xiaojia Wang, Tengyue He, Yuhai Zhang, Mohamed Eddaoudi, Osman M. Bakr, Omar F. Mohammed
Summary: The research on organic X-ray imaging scintillators is an attractive direction for chemists, materials scientists, physicists and engineers. By introducing heavy atoms, researchers improved the X-ray absorption capability of scintillators while maintaining their unique TADF properties and high photoluminescence quantum yield. The X-ray screens fabricated using this method showed high resolution and sensitivity.
Article
Chemistry, Multidisciplinary
Stephen A. Church, Hoyeon Choi, Nawal Al-Amairi, Ruqaiya Al-Abri, Ella Sanders, Eitan Oksenberg, Ernesto Joselevich, Patrick W. Parkinson
Summary: This study utilizes high-throughput single nanostructure spectroscopy to analyze over 8000 optoelectronic micro- and nanostructures. Using CsPbBr3 nanowires as an example, the study reveals the impact of nanowire width on optical bandgap, recombination rate, and surface interface rate. A model is established to explain these trends and predict the variation of internal quantum efficiency with width, which is confirmed experimentally. This approach is applicable to various nano- and microscale materials and requires minimal a priori information.
Article
Chemistry, Multidisciplinary
Jianming Lai, Qiutao Pan, Wenzhen Wang, Shaohan Wang, Ziyi Lai, Xiaoxi Feng, Jing Sun, Huanzhen Qi, Feng Hong, Zifa Zhang, Fei Xu, Junfeng Chen, Yan Zhu, Juan Qin, Hui Zhang, Run Xu, Linjun Wang
Summary: In this study, high-quality Cs3Cu2I5 single crystals with prominent crystal habit planes were achieved by controlling the concentration of I- ions and reducing the growth rate. The reaction-controlled growth method proved to be effective in improving the crystal quality of copper-based halide perovskite.
Article
Chemistry, Multidisciplinary
Jianming Lai, Qiutao Pan, Wenzhen Wang, Shaohan Wang, Ziyi Lai, Xiaoxi Feng, Jing Sun, Huanzhen Qi, Feng Hong, Zifa Zhang, Fei Xu, Junfeng Chen, Yan Zhu, Juan Qin, Hui Zhang, Run Xu, Linjun Wang
Summary: In this study, high-quality Cs3Cu2I5 single crystals with prominent crystal habit planes were successfully grown by controlling the concentration of I- ions in the solution. The optimized process greatly improved the crystal quality and resulted in enhanced energy resolution and absolute light yield.
Article
Materials Science, Multidisciplinary
Jian-Xin Wang, Yue Wang, Issatay Nadinov, Jun Yin, Luis Gutierrez-Arzaluz, Omar Alkhazragi, Tengyue He, Tien Khee Ng, Mohamed Eddaoudi, Husam N. Alshareef, Osman M. Bakr, Boon S. Ooi, Omar F. Mohammed
Summary: Aggregation-induced emission luminogens (AIEgens) have great potential in biomedical imaging and optical wireless communication due to their tight molecular packing and highly restricted vibrational motions.
ACS MATERIALS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Hong Wang, Jian-Xin Wang, Xin Song, Tengyue He, Yang Zhou, Osama Shekhah, Luis Gutierrez-Arzaluz, Mehmet Bayindir, Mohamed Eddaoudi, Osman M. Bakr, Omar F. Mohammed
Summary: Lead-free organic metal halide scintillators with low-dimensional electronic structures have shown great potential in X-ray detection and imaging. The organic copper halide CNCI was successfully used to fabricate X-ray scintillators with high sensitivity and resolution. By using a silicon template, the spatial imaging resolution of the CNCI scintillator was further improved.
ACS CENTRAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Husna Anwar, Andrew Johnston, Suhas Mahesh, Kamalpreet Singh, Zhibo Wang, Douglas A. Kuntz, Isaac Tamblyn, Oleksandr Voznyy, Gilbert G. Prive, Edward H. Sargent
Summary: High-throughput experimentation (HTE) is employed to accelerate the exploration of materials space, specifically in the field of metal halide perovskites (MHPs). A workflow is developed to synthesize and characterize light-emitting MHP single crystals, generating an experimentally derived photoluminescence spectra data set for low-dimensional MHPs. The accelerated workflow is used to optimize the synthesis and emission of a new MHP, and a large number of MHP single crystals are synthesized and measured to study the effects of synthesis parameters and compositional engineering on the emission intensity. Insights from this analysis are used to screen an existing database for potentially emissive MHPs, and top candidates for future exploration are presented. As a proof of concept, one of these candidates is used to synthesize an MHP with a photoluminescence quantum yield of 10%.
ACS CENTRAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Qifan Feng, Xiaofeng Huang, Ziheng Tang, Yaolin Hou, Qing Chang, Siqing Nie, Fang Cao, Xiaoying Niu, Jun Yin, Jing Li, Nanfeng Zheng, Binghui Wu
Summary: This study proposes a strategy using PbI6 octahedra-governing with functional synergism of cations and anions to protect unstable PbI6 octahedral frameworks in perovskite-photovoltaic applications. The strategy effectively passivates defects and stabilizes the octahedral structure, leading to high power conversion efficiency and stable continuous output in the modified modules. The anchoring-polymerization protection strategy also shows potential for building stable and practical perovskite photovoltaics.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Applied
Nishi Parikh, Meera Karamta, Neha Yadav, Mohammad Mahdi Tavakoli, Daniel Prochowicz, Seckin Akin, Abul Kalam, Soumitra Satapathi, Pankaj Yadav
Summary: Machine learning has emerged as a powerful technology in the field of metal halide perovskites for the prediction of material properties and rational design. Its applications in optimizing fabrication processes and reducing costs are gaining significant attention. This review provides a comprehensive overview of the use of machine learning in designing absorber layers and complete perovskite solar cells, discussing challenges and future research directions.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Physical
Hanyu Wang, Wenjing Zou, Yukun Ouyang, Xingchong Liu, Haimin Li, Hu Luo, Xiaopeng Zhao
Summary: The addition of oxamic acid potassium salt (OAPS) as a bifunctional additive to perovskite film effectively reduces nonradiative recombination loss, inhibits the formation of iodide Frenkel defects and I- ion migration, leading to enhanced power conversion efficiency and improved device stability.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Kenneth S. Vecchio, Olivia F. Dippo, Kevin R. Kaufmann, Xiao Liu
Summary: This article presents a high-throughput rapid experimental alloy development method that integrates a closed-loop material screening process and artificial intelligence agent technology. It achieves a unified framework for computational identification, experimental preparation, and high-throughput analysis, preventing institutional knowledge loss and enabling the use of new experimental data in new design objectives.
Article
Chemistry, Physical
Miguel Fuentes-Cabrera, Jonathan K. Sakkos, Daniel C. Ducat, Maxim Ziatdinov
Summary: Carboxysomes are bacterial microcompartments found in cyanobacteria that play a crucial role in photosynthetic metabolism. The assembly and dynamics of carboxysomes are not well understood, partly due to the limitations of microscopy in analyzing subtle changes in carboxysome morphology. In this study, deep learning techniques were used to analyze fluorescence microscopy images of cyanobacteria and quantitatively evaluate the impact of carboxysome shell remodelling on microcompartment morphology over time. The results suggest that this approach can accelerate the analysis of carboxysome assembly and dynamics.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Review
Chemistry, Multidisciplinary
Maxim Ziatdinov, Yongtao Liu, Kyle Kelley, Rama Vasudevan, Sergei V. Kalinin
Summary: Recent progress in machine learning methods and the availability of programmable interfaces for scanning probe microscopes have led to the development of automated and autonomous microscopies. Enabling automated microscopy requires task-specific machine learning methods and a balance between physical intuition and rewards defined by machine learning algorithms.
Article
Chemistry, Multidisciplinary
Kevin M. Roccapriore, Matthew G. Boebinger, Ondrej Dyck, Ayana Ghosh, Raymond R. Unocic, Sergei V. Kalinin, Maxim Ziatdinov
Summary: A robust approach for real-time analysis of STEM data streams based on ELIT of deep convolutional neural networks is implemented, enabling the exploration of specific atomic configurations under electron beam irradiation. Combined with beam control, this approach allows studying beam effects on selected atomic groups and chemical bonds in a fully automated mode. The demonstration of atomically precise engineering and identification of topological defects in transition metal dichalcogenides and graphene is presented. The ELIT-based approach facilitates direct on-the-fly analysis of STEM data and enables real-time feedback schemes for electron beam chemistry, atomic manipulation, and atom-by-atom assembly.
Article
Chemistry, Multidisciplinary
Yongtao Liu, Jonghee Yang, Benjamin J. Lawrie, Kyle P. Kelley, Maxim Ziatdinov, Sergei V. Kalinin, Mahshid Ahmadi
Summary: The increasing photovoltaic efficiency and stability of metal halide perovskites (MHPs) are attributed to the improvement in understanding the microstructure of polycrystalline MHP thin films. A workflow combining conductive atomic force microscopy (AFM) measurement with a machine learning (ML) algorithm was designed to systematically investigate the grain boundaries in MHPs. This approach revealed that the properties of grain boundaries play critical roles in MHP stability.
Article
Chemistry, Physical
Yongtao Liu, Jonghee Yang, Rama K. Vasudevan, Kyle P. Kelley, Maxim Ziatdinov, Sergei Kalinin, Mahshid Ahmadi
Summary: We demonstrate an active machine learning framework for driving an automated scanning probe microscope (SPM) to discover the microstructures responsible for specific aspects of transport behavior in metal halide perovskites (MHPs). This approach allows the microscope to discover the microstructural elements that maximize the onset of conduction, hysteresis, or any other characteristic derived from a set of current-voltage spectra. It provides new opportunities for exploring the origins of materials functionality in complex materials by SPM and can be integrated with other characterization techniques.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Review
Materials Science, Multidisciplinary
Jonghee Yang, Sergei V. Kalinin, Ekin D. Cubuk, Maxim Ziatdinov, Mahshid Ahmadi
Summary: Low-dimensional hybrid perovskites combine the physical functionalities of inorganic materials and complexity of organic molecules to form self-organized complex structures. These materials offer high-performance optoelectronics and versatile applications, and can be produced cost-effectively.
Article
Chemistry, Multidisciplinary
Muammer Y. Yaman, Sergei V. Kalinin, Kathryn N. Guye, David S. Ginger, Maxim Ziatdinov
Summary: The application of machine learning is demonstrated for rapidly and accurately extracting plasmonic particles cluster geometries from hyperspectral image data using a dual variational autoencoder (dual-VAE). This approach shares information between the latent spaces of two VAEs, one handling particle shape data and the other handling spectral data, while enforcing a common encoding for shape-spectra pairs. The results show that this approach can establish the relationship between the geometric characteristics of nanoparticles and their far-field photonic responses, allowing for accurate prediction of the geometry of multiparticle assemblies below the diffraction limit using hyperspectral darkfield microscopy in an automated manner.
Article
Chemistry, Physical
Yongtao Liu, Rama K. K. Vasudevan, Kyle P. Kelley, Hiroshi Funakubo, Maxim Ziatdinov, Sergei V. V. Kalinin
Summary: We developed automated experiment workflows for identifying the best predictive channel in spectroscopic measurements. The approach combines ensembled deep kernel learning for probabilistic predictions and reinforcement learning for channel selection. The implementation in multimodal imaging of piezoresponse force microscopy (PFM) showed that the amplitude is the best predictive channel for polarization-voltage and frequency-voltage hysteresis loop areas. This workflow and code can be applied to other multimodal imaging and local characterization methods.
NPJ COMPUTATIONAL MATERIALS
(2023)
Article
Computer Science, Artificial Intelligence
Yongtao Liu, Anna N. Morozovska, Eugene A. Eliseev, Kyle P. Kelley, Rama Vasudevan, Maxim Ziatdinov, Sergei V. Kalinin
Summary: Using hypothesis-learning-driven automated scanning probe microscopy (SPM), this study investigates the bias-induced transformations in various devices and materials. It is crucial to understand these mechanisms on the nanometer scale with a wide range of control parameters, which is experimentally challenging. The hypothesis-driven SPM autonomously identifies the mechanisms of bias-induced domain switching and reveals the importance of kinetic control.
Article
Computer Science, Artificial Intelligence
Sergei Kalinin, Rama Vasudevan, Yongtao Liu, Ayana Ghosh, Kevin Roccapriore, Maxim Ziatdinov
Summary: Microscopy provides an ideal experimental environment for the development and deployment of active Bayesian and reinforcement learning methods. By utilizing domain-specific deployable algorithms and static datasets, machine learning methods can be applied to microscopy and chemical imaging, accelerating real-world ML applications and scientific progress.
MACHINE LEARNING-SCIENCE AND TECHNOLOGY
(2023)
Article
Computer Science, Artificial Intelligence
Arpan Biswas, Rama Vasudevan, Maxim Ziatdinov, Sergei Kalinin
Summary: Unsupervised and semi-supervised ML methods like VAE are widely used in physics, chemistry, and materials sciences for disentangling representations and finding latent manifolds in complex experimental data. This study explores a latent Bayesian optimization approach for hyperparameter trajectory optimization in unsupervised and semi-supervised ML, demonstrated by joint-VAE with rotational invariances. The method is applied to finding joint discrete and continuous rotationally invariant representations in the MNIST database and a plasmonic nanoparticles material system.
MACHINE LEARNING-SCIENCE AND TECHNOLOGY
(2023)
Article
Computer Science, Artificial Intelligence
S. V. Venkatakrishnan, Chris M. Fancher, Maxim Ziatdinov, Rama Vasudevan, Kyle Saleeby, James Haley, Dunji Yu, Ke An, Alex Plotkowski
Summary: Neutron diffraction is a useful technique for mapping residual strains in dense metal objects. In this paper, the authors propose an object adaptive sampling strategy to measure the significant points first and predict the next most informative positions to measure. They demonstrate the real-time measure-infer-predict workflow on additively manufactured steel parts, leading to faster strain mapping with useful real-time feedback.
MACHINE LEARNING-SCIENCE AND TECHNOLOGY
(2023)
Article
Computer Science, Artificial Intelligence
Arpan Biswas, Maxim Ziatdinov, Sergei Kalinin
Summary: This paper presents a physics augmented machine learning method that combines variational autoencoders and a physics driven loss function to extract meaningful information from large volumes of imaging data.
MACHINE LEARNING-SCIENCE AND TECHNOLOGY
(2023)
Proceedings Paper
Computer Science, Artificial Intelligence
Anees Al-Najjar, Nageswara S. V. Rao, Ramanan Sankaran, Helia Zandi, Debangshu Mukherjee, Maxim Ziatdinov, Craig Bridges
Summary: This article presents a framework for developing network-level cyber solutions that support remote control of science instruments and data collection. The framework is based on provisioning separate data and control connections and developing software modules using Python wrappers and Pyro server-client codes. The framework is demonstrated through automated measurement transfers and remote control operations in a microscopy use case, and it is currently being refined and applied to science workflows in autonomous chemistry laboratories and smart energy grid simulations.
2023 IEEE INTERNATIONAL CONFERENCE ON SMART COMPUTING, SMARTCOMP
(2023)
Article
Automation & Control Systems
Sheryl Sanchez, Yongtao Liu, Jonghee Yang, Sergei V. Kalinin, Maxim Ziatdinov, Mahshid Ahmadi
Summary: In recent years, laboratory automation and high-throughput synthesis and characterization have become increasingly important in the research community. To effectively analyze the large datasets and extract system properties, suitable machine learning techniques, such as the variational autoencoder (VAE) approach, are needed. This study explores the binary library of metal halide perovskite microcrystals using low-dimensional latent representations of photoluminescence spectra. The combination of translationally invariant variational autoencoders (tVAEs) and conditional autoencoders (cVAEs) allows for a deeper understanding of the underlying mechanisms within the data.
ADVANCED INTELLIGENT SYSTEMS
(2023)