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Duan T, You S, Chen M, Yu W, Li Y, Guo P, Berry JJ, Luther JM, Zhu K, Zhou Y. Chiral-structured heterointerfaces enable durable perovskite solar cells. Science 2024; 384:878-884. [PMID: 38781395 DOI: 10.1126/science.ado5172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Accepted: 04/11/2024] [Indexed: 05/25/2024]
Abstract
Mechanical failure and chemical degradation of device heterointerfaces can strongly influence the long-term stability of perovskite solar cells (PSCs) under thermal cycling and damp heat conditions. We report chirality-mediated interfaces based on R-/S-methylbenzyl-ammonium between the perovskite absorber and electron-transport layer to create an elastic yet strong heterointerface with increased mechanical reliability. This interface harnesses enantiomer-controlled entropy to enhance tolerance to thermal cycling-induced fatigue and material degradation, and a heterochiral arrangement of organic cations leads to closer packing of benzene rings, which enhances chemical stability and charge transfer. The encapsulated PSCs showed retentions of 92% of power-conversion efficiency under a thermal cycling test (-40°C to 85°C; 200 cycles over 1200 hours) and 92% under a damp heat test (85% relative humidity; 85°C; 600 hours).
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Affiliation(s)
- Tianwei Duan
- Department of Physics, Hong Kong Baptist University, Kowloon, Hong Kong SAR 999077, China
| | - Shuai You
- Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO 80401, USA
| | - Min Chen
- Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO 80401, USA
| | - Wenjian Yu
- Department of Physics, Hong Kong Baptist University, Kowloon, Hong Kong SAR 999077, China
| | - Yanyan Li
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06520, USA
- Energy Sciences Institute, Yale University, West Haven, CT 06516, USA
| | - Peijun Guo
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT 06520, USA
- Energy Sciences Institute, Yale University, West Haven, CT 06516, USA
| | - Joseph J Berry
- Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO 80401, USA
- Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, CO 80303, USA
- Department of Physics, University of Colorado Boulder, Boulder, CO 80302, USA
| | - Joseph M Luther
- Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO 80401, USA
- Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, CO 80303, USA
| | - Kai Zhu
- Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, CO 80401, USA
| | - Yuanyuan Zhou
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR 999077, China
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Solyaev YO, Ustenko AD, Babaytsev AV, Dobryanskiy VN. Improved mechanical performance of quasi-cubic lattice metamaterials with asymmetric joints. Sci Rep 2023; 13:14846. [PMID: 37684275 PMCID: PMC10491757 DOI: 10.1038/s41598-023-41614-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Accepted: 08/29/2023] [Indexed: 09/10/2023] Open
Abstract
In this paper, we propose a simple method for the modification of the unit cells in the lattice metamaterials that provides an improvement of their impact strength. The idea is based on the introduction of small mutual offsets of the interconnected struts inside the unit cells. In such way, the joints between the struts become asymmetric and the overall geometry of the unit cells can be defined as the quasi-cubic with the axis of chirality. Considering four types of cubic lattices with BCC, BCT, FCC and octahedron structures, we modified their geometry and investigated the influence of the offsets and the unit cell size on the overall performance in static and dynamic tests. From the experiments we found that the small offsets (less than the strut diameter) can allow to increase the impact strength of 3d-printed polymeric specimens in 1.5-3 times remaining almost the same density and static mechanical properties. Based on the numerical simulations, we show that the explanation of the observed phenomena can be related to the increase of plastic deformations and damage accumulation in the unit-cells with asymmetric joints leading to the transition from the quasi-brittle to the ductile type of fracture in tested specimens.
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Affiliation(s)
- Yury O Solyaev
- Institute of Applied Mechanics of Russian Academy of Sciences, Leningradsky ave., 4, Moscow, Russia, 125090.
- Moscow Aviation Institute, Volokolamskoe ave., Moscow, Russia, 125993.
| | - Anastasia D Ustenko
- Institute of Applied Mechanics of Russian Academy of Sciences, Leningradsky ave., 4, Moscow, Russia, 125090
- Moscow Aviation Institute, Volokolamskoe ave., Moscow, Russia, 125993
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Fardan MF, Lenggana BW, Ubaidillah U, Choi SB, Susilo DD, Khan SZ. Revolutionizing Prosthetic Design with Auxetic Metamaterials and Structures: A Review of Mechanical Properties and Limitations. MICROMACHINES 2023; 14:1165. [PMID: 37374750 DOI: 10.3390/mi14061165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/20/2023] [Accepted: 05/28/2023] [Indexed: 06/29/2023]
Abstract
Prosthetics have come a long way since their inception, and recent advancements in materials science have enabled the development of prosthetic devices with improved functionality and comfort. One promising area of research is the use of auxetic metamaterials in prosthetics. Auxetic materials have a negative Poisson's ratio, which means that they expand laterally when stretched, unlike conventional materials, which contract laterally. This unique property allows for the creation of prosthetic devices that can better conform to the contours of the human body and provide a more natural feel. In this review article, we provide an overview of the current state of the art in the development of prosthetics using auxetic metamaterials. We discuss the mechanical properties of these materials, including their negative Poisson's ratio and other properties that make them suitable for use in prosthetic devices. We also explore the limitations that currently exist in implementing these materials in prosthetic devices, including challenges in manufacturing and cost. Despite these challenges, the future prospects for the development of prosthetic devices using auxetic metamaterials are promising. Continued research and development in this field could lead to the creation of more comfortable, functional, and natural-feeling prosthetic devices. Overall, the use of auxetic metamaterials in prosthetics represents a promising area of research with the potential to improve the lives of millions of people around the world who rely on prosthetic devices.
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Affiliation(s)
- Muhammad Faris Fardan
- Department of Mechanical Engineering, Faculty of Engineering, Universitas Sebelas Maret, Surakarta 57126, Jawa Tengah, Indonesia
| | - Bhre Wangsa Lenggana
- Department of Mechanical Engineering, Faculty of Engineering, Universitas Sebelas Maret, Surakarta 57126, Jawa Tengah, Indonesia
- PT. Bengawan Teknologi Terpadu, Km. 6.5, Wonorejo, Gondangrejo, Karanganyar 65132, Jawa Tengah, Indonesia
| | - U Ubaidillah
- Department of Mechanical Engineering, Faculty of Engineering, Universitas Sebelas Maret, Surakarta 57126, Jawa Tengah, Indonesia
- Mechanical Engineering Department, Faculty of Engineering, Islamic University of Madinah, Al Madinah Al Munawwarah 42351, Saudi Arabia
| | - Seung-Bok Choi
- Department of Mechanical Engineering, Industrial University of Ho Chi Minh City (IUH), Ho Chi Minh City 70000, Vietnam
- Department of Mechanical Engineering, The State University of New York at Korea (SUNY Korea), Incheon 21985, Republic of Korea
| | - Didik Djoko Susilo
- Department of Mechanical Engineering, Faculty of Engineering, Universitas Sebelas Maret, Surakarta 57126, Jawa Tengah, Indonesia
| | - Sohaib Zia Khan
- Mechanical Engineering Department, Faculty of Engineering, Islamic University of Madinah, Al Madinah Al Munawwarah 42351, Saudi Arabia
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Kim YJ, Moon JB, Hwang H, Kim YS, Yi GR. Advances in Colloidal Building Blocks: Toward Patchy Colloidal Clusters. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2203045. [PMID: 35921224 DOI: 10.1002/adma.202203045] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 07/29/2022] [Indexed: 06/15/2023]
Abstract
The scalable synthetic route to colloidal atoms has significantly advanced over the past two decades. Recently, colloidal clusters with DNA-coated cores called "patchy colloidal clusters" have been developed, providing a directional bonding with specific angle of rotation due to the shape complementarity between colloidal clusters. Through a DNA-mediated interlocking process, they are directly assembled into low-coordination colloidal structures, such as cubic diamond lattices. Herein, the significant progress in recent years in the synthesis of patchy colloidal clusters and their assembly in experiments and simulations is reviewed. Furthermore, an outlook is given on the emerging approaches to the patchy colloidal clusters and their potential applications in photonic crystals, metamaterials, topological photonic insulators, and separation membranes.
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Affiliation(s)
- You-Jin Kim
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Jeong-Bin Moon
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Hyerim Hwang
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea
- Department of Chemical Engineering & Materials Science, Ewha Womans University, Seoul, 03760, Republic of Korea
| | - Youn Soo Kim
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Gi-Ra Yi
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea
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