Article
Chemistry, Multidisciplinary
Hanming Li, Hong Lin, Dan Ouyang, Canglang Yao, Can Li, Jiayun Sun, Yilong Song, Yufeng Wang, Yanfa Yan, Yong Wang, Qingfeng Dong, Wallace C. H. Choy
Summary: By incorporating PMA during the synthesis of nanocrystals, it helps improve the stability and efficiency of perovskite light-emitting diodes, achieving high efficiency and stability for red-emitting PeLEDs.
ADVANCED MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Yunhui Kuang, Lvpeng Yang, Junming Ma, Tong Bie, Di Zhang, Yazhuo Xue, Naigen Zhou, Ming Shao
Summary: This study demonstrates the use of a bifunctional additive, KTFA, to improve the performance of quasi-2D perovskite light-emitting diodes (PeLEDs). The KTFA-modified PeLEDs exhibit high quantum efficiency, high luminance, and emission close to pure red. The devices also show stable spectra and long lifetimes.
ACS MATERIALS LETTERS
(2023)
Review
Optics
Runnan Yu, Changxiao Li, Biao Zhao, Zhan'ao Tan
Summary: This work reviews the research history of green perovskite light-emitting diodes (GPeLEDs), introduces perovskites of different dimensions, and discusses the common synthesis methods of perovskites. Additionally, strategies to improve the stability and luminous efficiency of GPeLEDs are summarized, including component engineering, phase engineering, ligand engineering, additive engineering, interface engineering, and optical coupling structure strategy. Finally, the development state of GPeLEDs is summarized and future prospects are discussed.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Nan Li, Sofia Apergi, Christopher C. S. Chan, Yongheng Jia, Fangyan Xie, Qiong Liang, Gang Li, Kam Sing Wong, Geert Brocks, Shuxia Tao, Ni Zhao
Summary: By using diammonium halides to regulate the formation of mixed bromide-iodide perovskite films, the performance of 3D mixed-halide perovskite-based light-emitting diodes (LEDs) can be improved, resulting in devices with record luminance and half-lifetime.
ADVANCED MATERIALS
(2022)
Article
Engineering, Environmental
Xinxin Ban, Qingpeng Cao, Wei Yang, Wenhao Zhang, Hui Xu, Jiayi Wang, Xiuwang Li, Chunhong Gao
Summary: In this study, two semiconductor TADF polymers were designed and synthesized as additives for perovskite light emitting diodes (PeLEDs) for the first time. The results showed that the addition of the TADF polymer as an efficient additive can reduce the non-radiative transition of the perovskite and enhance its photoluminescence performance and stability. This finding highlights the potential of semiconductor TADF polymers as functional additives for high-performance perovskite electroluminescence devices.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
Dexin Yang, Baodan Zhao, Tao Yang, Runchen Lai, Dongchen Lan, Richard H. Friend, Dawei Di
Summary: Metal halide perovskites, a promising class of materials for display and lighting applications, have seen a rapid increase in device efficiencies. However, challenges remain in achieving high operational stability and efficient blue emission. Interdisciplinary research involving materials scientists, chemists, and physicists is crucial for realizing operationally stable PeLEDs.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Qiangqiang Wang, Shuo Ding, Siliang He, Ting Zhang, Lei Qian, Peng Xiao, Tao Chen, Chaoyu Xiang
Summary: This study demonstrates the feasibility of significant stability improvement for PeLEDs using a simple cation engineering strategy, in which long-chain phenylbutanammonium is used to effectively suppress ion migration inside the PeLEDs.
ADVANCED OPTICAL MATERIALS
(2023)
Review
Optics
Yi Yu, Yingyi Tang, Bingfeng Wang, Kai Zhang, Jian-Xin Tang, Yan-Qing Li
Summary: Metal halide perovskite materials have great potential for next-generation optoelectronic devices, but the commercialization of red perovskite LEDs is hindered by their instability and toxicity. This review discusses the structures, properties, and preparation approaches of red emissive perovskite materials, as well as the strategies to improve the performance of red PeLEDs. Challenges and potential solutions are also discussed.
LASER & PHOTONICS REVIEWS
(2023)
Article
Nanoscience & Nanotechnology
Lulu Zhang, Yangyang Xie, Zhongzhi Tian, Yixuan Liu, Chong Geng, Shu Xu
Summary: This study proposed a new thermal conductive encapsulation technique for PNCs to improve the heat accumulation issue inside PcLEDs, effectively enhancing the long-term stability and durability of PcLEDs.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Multidisciplinary Sciences
Yuwei Guo, Sofia Apergi, Nan Li, Mengyu Chen, Chunyang Yin, Zhongcheng Yuan, Feng Gao, Fangyan Xie, Geert Brocks, Shuxia Tao, Ni Zhao
Summary: Researchers investigate how the use of ammonium passivation molecules with different alkyl chain lengths can enhance device stability by suppressing iodide ion migration through steric hindrance and Coulomb interactions, thereby improving the performance of perovskite light emitting diodes.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Yun Luo, Lingmei Kong, Lin Wang, Xingyu Shi, Hao Yuan, Wenqiang Li, Sheng Wang, Zhijun Zhang, Wenqing Zhu, Xuyong Yang
Summary: The electroluminescence performance and long-term stability of perovskite light-emitting diodes (PeLEDs) are greatly improved by using an ionic liquid to control the growth of perovskite films, resulting in uniform films and reduced defect states.
Review
Chemistry, Multidisciplinary
Jiawei Chen, Hengyang Xiang, Jian Wang, Run Wang, Yan Li, Qingsong Shan, Xiaobao Xu, Yuhui Dong, Changting Wei, Haibo Zeng
Summary: As global issues such as global warming, energy shortages, and environmental pollution intensify, low-carbon energy-saving lighting technology has attracted worldwide attention. LEDs, considered to be the most ideal lighting technology currently, are known for their high luminescence efficiency and long lifespan. Recently, perovskite-based LEDs have emerged as ideal candidates for lighting technology due to their extraordinary photoelectric properties.
Review
Materials Science, Multidisciplinary
Kangyu Ji, Miguel Anaya, Anna Abfalterer, Samuel D. Stranks
Summary: Halide perovskites have shown remarkable optoelectronic properties in next-generation solid-state lighting and displays, particularly in LEDs with high external quantum efficiencies. Challenges related to device stability and material toxicity are being addressed, while there is potential for white light emission and lasing applications using perovskite materials in the future.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yarong He, Jiaxu Yan, Lei Xu, Bangmin Zhang, Qian Cheng, Yu Cao, Ju Zhang, Cong Tao, Yingqiang Wei, Kaichuan Wen, Zhiyuan Kuang, Gan Moog Chow, Zexiang Shen, Qiming Peng, Wei Huang, Jianpu Wang
Summary: Room-temperature-high-efficiency light-emitting diodes based on metal halide perovskite FAPbI(3) exhibit excellent performance at low temperatures, with increased quantum efficiency and stability. The enhanced EQE at low temperatures is attributed to the increased photoluminescence quantum efficiencies of the perovskite, leading to an increased radiative recombination rate.
ADVANCED MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Nan Li, Yongheng Jia, Yuwei Guo, Ni Zhao
Summary: This paper systematically discusses ion-related issues in PeLEDs, including the material and processing origins of ion generation, the mechanisms driving ion migration, characterization approaches for probing ion distributions, the effects of ion migration on device performance and stability, and strategies for ion management. The remaining challenges and future opportunities in this field are highlighted.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Ceramics
T. Sopcak, L. Medvecky, P. Jevinova, M. Giretova, A. Mahun, L. Kobera, R. Stulajterova, F. Kromka, V. Girman, M. Balaz
Summary: In recent years, there has been an increasing interest in developing more reactive calcium silicate cements (CSCs) that possess superior bioactivity, self-setting properties, and mechanical strength for various dental applications. This study successfully produced a biphasic larnite/bredigite calcium magnesium silicate cement (CaMgSi) with improved properties by incorporating boron (B) in different amounts. The result showed enhanced hydration, self-setting, mechanical strength, and antibacterial activity of the boron-modified CaMgSi cements, making them promising for potential use in dentistry.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Yaohui Li, Xiang Wu, Guangzheng Zuo, Yufei Wang, Xianjie Liu, Yanxian Ma, Bolun Li, Xu-Hui Zhu, Hongbin Wu, Jian Qing, Lintao Hou, Wanzhu Cai
Summary: Selective electron transport and extraction are crucial for photovoltaic devices. This study presents an electron transport layer (ETL) configuration composed of a solution-processed n-n organic heterojunction to enhance electron transport and boost power conversion efficiency (PCE) in organic photovoltaics (OPV). The n-n heterojunction consists of a narrow-band n-type conjugated polymer layer (PNDIT-F3N) and a wide-band n-type conjugated molecule layer (Phen-NaDPO). The performance improvement in OPVs with different active layers is attributed to selective carrier transport properties, reduced recombination, and good film-forming quality of the ETL configuration.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Bin Zhang, Johan Klarbring, Fuxiang Ji, Sergei Simak, Igor A. Abrikosov, Feng Gao, Galyna Yu Rudko, Weimin M. Chen, Irina A. Buyanova
Summary: Phonon-phonon and electron/exciton-phonon coupling are found to play a vital role in the thermal, electronic, and optical properties of metal halide perovskites. Our study focuses on the evaluation of phonon anharmonicity and coupling between electronic and vibrational excitations in the novel material, Cs2NaFeCl6, through Raman measurements and theoretical calculations. The results highlight the significance of phonon-phonon and electron-phonon interactions in the electronic properties of Cs2NaFeCl6.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Jiajun Qin, Yang Tang, Jia Zhang, Tangyao Shen, Max Karlsson, Tiankai Zhang, Weidong Cai, Lei Shi, Wei-Xin Ni, Feng Gao
Summary: In this study, we evaluate the threshold carrier density of optically pumped lasers and find that the carrier cooling process in perovskites is slower than previously assumed. However, we observe that lower energy photon excitation speeds up the carrier cooling process and facilitates efficient carrier accumulation. By extrapolating the optical pumping threshold to band edge excitation, we obtain a critical threshold carrier density one order of magnitude lower than conventional estimates.
MATERIALS HORIZONS
(2023)
Article
Energy & Fuels
Bo Feng, Jingjing Zhao, Sein Chung, Kilwon Cho, Shirong Lu, Weidong Xu, Zhipeng Kan
Summary: Organic solar cells (OSCs) have shown great promise for powering IoT and off-grid devices under indoor light. However, the performance of indoor devices may be underestimated due to trap-assisted charge recombination caused by differences in incident light. This study demonstrates that regulating the donor-acceptor interfaces is crucial for reducing trap density and improving the performance of indoor OSCs. The results provide novel optimization guidelines for high-performing indoor OSCs.
Article
Nanoscience & Nanotechnology
Konstantin A. Milakin, Sonal Gupta, Libor Kobera, Andrii Mahun, Magdalena Konefal, Olga Kockova, Oumayma Taboubi, Zuzana Moravkova, Jia Min Chin, Kamal Allahyarli, Patrycja Bober
Summary: Composites of PANI and Zr-based MOFs, UiO-66 and UiO-66-NH2, were synthesized with high MOF content close to the theoretical value. The morphology of the composites was determined by the MOF templates, and the MOF structure was mostly preserved. The introduction of MOFs significantly improved the electrochemical performance and cycling stability of the PANI-MOF composites, making them attractive for energy storage applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Jian Qing, Sankaran Ramesh, Xiao-Ke Liu, Heyong Wang, Hongling Yu, Chaoyang Kuang, Lintao Hou, Wenjing Zhang, Tze Chien Sum, Feng Gao
Summary: The judicious selection of spacer cations in Ruddlesden-Popper perovskites (RPPs) allows for the engineering of film properties, leading to efficient red perovskite light-emitting diodes (PeLEDs) that meet the recommendation 2020 standard. Specifically, the use of phenoxyethylammonium (POEA) as a spacer cation results in narrow phase distribution, efficient energy transfer, and low trap density, achieving a peak external quantum efficiency of 10.3% and a maximum brightness of 1052 cd m-2. These findings provide valuable insights for the rational design of high-performance RPPs.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Lucie Leonova, Zdenek Moravec, Petr Sazama, Jana Pastvova, Libor Kobera, Jiri Brus, Ales Styskalik
Summary: Introducing organic groups into metal silicate catalysts can improve their performance, but it does not guarantee hydrophobicity control. Thorough characterization is necessary to understand the interaction between the catalyst surface, reactants, and products. In this study, an aluminosilicate catalyst was modified with trimethylsilyl groups, and the number of groups was controlled. Water sorption measurements showed decreased water adsorption, and the turnover frequency in certain reactions increased with the number of trimethylsilyl groups.
Article
Polymer Science
Jelena Lubura, Libor Kobera, Sabina Abbrent, Ewa Pavlova, Beata Strachota, Oskar Bera, Jelena Pavlicevic, Bojana Ikonic, Predrag Kojic, Adam Strachota
Summary: A new generation biomass-based filler called 'hydrochar' (HC) was obtained from hydrothermal carbonization of hardwood waste. HC, intended as a partial replacement for traditional carbon black (CB) filler in rubber composites, had larger particle size and similar specific surface area compared to CB. Morphology investigations showed even distribution of HC and CB in rubber nanocomposites, and vulcanization rheology tests revealed that HC had a significant influence on vulcanization chemistry.
Article
Materials Science, Multidisciplinary
Zhenmin Zhao, Jingjing Zhao, Sein Chung, Kilwon Cho, Weidong Xu, Zhipeng Kan
Summary: The performance of organic solar cells has been greatly improved by using bulk heterojunction active layer structure. However, this structure also leads to higher charge recombination and energetic disorder. In this study, we successfully fabricated organic solar cells with a bilayer structure and achieved a high power conversion efficiency of 18.1%. The superior crystallinity features and suppressed charge recombination and energetic disorder in the bilayer structure contribute to the improved performance.
ACS MATERIALS LETTERS
(2023)
Article
Optics
Yanze Wang, Wenjing Zhao, Yuanyuan Guo, Wenbo Hu, Chenxi Peng, Lei Li, Yuan Wei, Zhongbin Wu, Weidong Xu, Xiyan Li, Yung Doug Suh, Xiaowang Liu, Wei Huang
Summary: In this study, monodisperse copper(I)-iodide cluster microcubes were synthesized as a new class of X-ray scintillators. These microcubes exhibit remarkable sensitivity to X-rays and exceptional stability under moisture and X-ray exposure. The uniform size distribution and high scintillation performance make them suitable for large-area, flexible scintillating films for X-ray imaging applications in both static and dynamic settings.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Bin Zhang, Yuqing Huang, Fuxiang Ji, Xiaohe Miao, Feng Gao, Weimin M. Chen, Irina A. Buyanova
Summary: We report the first observation of second harmonic generation (SHG) from halide double perovskite single crystals. The SHG efficiency of these materials with centrosymmetric crystalline structures is strongly dependent on the measurement temperature, increasing by up to 3 orders of magnitude at low temperatures under light illumination. The enhancement is attributed to the build-up of a light-induced electric field within the near-surface region.
Article
Physics, Multidisciplinary
Joakim Argillander, Alvaro Alarcon, Chunxiong Bao, Chaoyang Kuang, Gustavo Lima, Feng Gao, Guilherme B. Xavier
Summary: The authors demonstrate a certified quantum random number generator using a metal-halide perovskite light emitting diode. This new technology has the potential to revolutionize optical communication and lighting devices, and also has applications in quantum technologies.
COMMUNICATIONS PHYSICS
(2023)
Article
Chemistry, Physical
Shoushuang Huang, Shuzhen Ma, Libin Liu, Zhiqiang Jin, Pengyan Gao, Kaimei Peng, Yong Jiang, Amene Naseri, Zhangjun Hu, Jiujun Zhang
Summary: In this study, phosphorus-doped Co3S4/NiS2 heterostructures embedded in N-doped carbon nanoboxes were synthesized for efficient water splitting. The introduction of phosphorus dopants improved the conductivity of the metal sulfides, promoted charge transfer, and created new electrocatalytic sites. The catalyst exhibited excellent electrocatalytic activity for water splitting, with small overpotentials required for hydrogen and oxygen evolution reactions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
