Article
Materials Science, Multidisciplinary
Ching -Ho Tien, Hui-Hsuan Tsai, Lung -Chien Chen
Summary: This study proposes a surface ligand passivation strategy to enhance the photonic characteristics and stability of CsPbBr3 perovskite nanocomposites by modifying PeQDs with didodecyl dimethyl ammonium bromide (DDAB) and gold nanoparticles (AuNPs). The incorporation of DDAB and AuNPs improved the photoluminescence intensity and external quantum efficiency of the LEDs.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Yanyan He, Lulu Zhang, Guantong Chen, Yuanhong Liu, Shuangshuang Shi, Panpan Jiang, Jie Ding, Shu Xu, Chong Geng
Summary: A facile one-pot strategy to grow crystalline ZnO/SiO2 dual-layer encapsulation on CsPbBr3 perovskite nanocrystals (PNCs) has been reported. The encapsulation provides robust surface passivation to withstand the harsh conditions in hybrid light-emitting diodes (LEDs). The ZnO/SiO2 encapsulated PNCs show excellent stability, preserving 100% of their initial photoluminescence intensity after 500 hours of continuous irradiation.
APPLIED SURFACE SCIENCE
(2023)
Review
Chemistry, Multidisciplinary
Peng Xiao, Yicong Yu, Junyang Cheng, Yonglong Chen, Shengjin Yuan, Jianwen Chen, Jian Yuan, Baiquan Liu
Summary: This review comprehensively summarizes state-of-the-art concepts to improve the lifetime of perovskite light-emitting diodes (PeLEDs), covering aspects such as perovskite emitting material design, device engineering innovation, optical effects manipulation, and advanced encapsulations. Strategies to enhance the lifetime of both organic-inorganic hybrid and all-inorganic PeLEDs are highlighted, with a particular focus on managing optical effects and encapsulations. Challenges and opportunities to further enhance the lifetime of PeLEDs are also introduced.
Article
Chemistry, Multidisciplinary
Liang Zhang, Na Li, Dawei Liu, Guanhong Tao, Weidong Xu, Mengmeng Li, Ying Chu, Chensi Cao, Feiyue Lu, Chenjie Hao, Ju Zhang, Yu Cao, Feng Gao, Nana Wang, Lin Zhu, Wei Huang, Jianpu Wang
Summary: This article introduces a deep learning method that accurately predicts the effectiveness of additives in perovskite optoelectronic devices using a small dataset, achieving highly efficient PeLEDs.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Wenhao Bai, Tongtong Xuan, Haiyan Zhao, Haorui Dong, Xinru Cheng, Le Wang, Rong-Jun Xie
Summary: Ultra-high-efficiency green perovskite light-emitting diodes (PeLEDs) are achieved by regulating charge carrier transport and near-field light distribution to reduce electron leakage and enhance light outcoupling efficiency, resulting in quantum efficiencies surpassing 30%. This is accomplished by using Ni0.9Mg0.1Ox films with high refractive index and increased hole carrier mobility as the hole injection layer, and inserting a polyethylene glycol layer between the hole transport layer and the perovskite emissive layer to block electron leakage and reduce photon loss. This study provides an interesting idea for constructing super high-efficiency PeLEDs by balancing electron-hole recombination and enhancing light outcoupling.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Zong-Liang Tseng, Yan-Siang Huang, Yi-Liang Liu, Tsung-Lin Wu, Yu-Jen Wei
Summary: This study demonstrates the use of TOAB salts for ligand-exchange reactions to improve the stability and device performance of CsPbI3 perovskite nanoparticles. TOAB passivation provides a negatively polarized surface, higher steric hindrance, and a small amount of Br- anions in the NP lattice, significantly enhancing NP stability. The red NP-based light-emitting diodes (NpLEDs) based on TOAB-passivated NPs exhibit excellent performance with a maximum luminescence of 1345 cd/m(2) and a maximum external quantum efficiency of 11.7%.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Chemistry, Physical
Guangruixing Zou, Ziming Chen, Zhenchao Li, Hin-Lap Yip
Summary: Metal halide perovskites are promising candidates for lighting applications due to their excellent optoelectronic properties. However, blue perovskite LEDs still lag behind green and red counterparts in terms of efficiency and stability. Strategies such as composition engineering, dimensional engineering, and the use of perovskite nanocrystals and quantum dots are being explored to improve blue perovskite LED performance.
ACTA PHYSICO-CHIMICA SINICA
(2021)
Article
Chemistry, Multidisciplinary
Wenhao Bai, Mingming Liang, Tongtong Xuan, Ting Gong, Liang Bian, Huili Li, Rong-Jun Xie
Summary: By using L-glutathione reduced (GSH) as surface ligands, high-quality phenethylammonium tin iodide (PEA2SnI4) perovskite films were successfully constructed, leading to efficient pure red light-emitting diodes. This ligand engineering strategy effectively reduces the crystallization rate and suppresses the oxidation of Sn2+ ions, improving the film morphology and optical properties. The study demonstrates the feasibility of ligand engineering in enhancing the electroluminescence performance of Sn-based perovskite light-emitting diodes (PeLEDs).
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Nanoscience & Nanotechnology
Shaoni Kar, Nur Fadilah Jamaludin, Natalia Yantara, Subodh G. Mhaisalkar, Wei Lin Leong
Summary: Perovskite semiconductors have seen rapid development in the field of optoelectronics in recent years, particularly in light emission applications, with improvements in external quantum efficiency. However, further optimization of light propagation within device stacks and addressing issues of environmental and operational stability are still needed.
Review
Nanoscience & Nanotechnology
Shaoni Kar, Nur Fadilah Jamaludin, Natalia Yantara, Subodh G. Mhaisalkar, Wei Lin Leong
Summary: Perovskite semiconductors have shown rapid development in optoelectronic applications, particularly in photovoltaics and light emission. There is still room for optimization in improving external efficiencies and addressing stability issues. Through materials engineering and careful control of optical processes, higher efficiency light propagation and outcoupling can be achieved.
Review
Engineering, Electrical & Electronic
Azhar Fakharuddin, Mahesh K. Gangishetty, Mojtaba Abdi-Jalebi, Sang-Hyun Chin, Abd Rashid bin Mohd Yusoff, Daniel N. Congreve, Wolfgang Tress, Felix Deschler, Maria Vasilopoulou, Henk J. Bolink
Summary: Light-emitting diodes based on halide perovskites have achieved significant progress in recent years, with external quantum efficiencies surpassing 23%. However, their practical application is still limited due to factors such as low efficiency in blue-emitting devices, inability to access emission wavelengths above 800 nm, decreased external quantum efficiency at high current density, lack of understanding of the electric field's effect on mobile ions in perovskite materials, and short device lifetimes. This review explores the development of perovskite light-emitting diodes, examining the key challenges in creating efficient and stable devices.
NATURE ELECTRONICS
(2022)
Review
Chemistry, Multidisciplinary
Mingfei Zheng, Guojia Fang
Summary: Metal halide perovskites, as emerging light emitters, have attracted significant attention for their potential applications. PeLEDs based on lead halide perovskites have been extensively studied, with surface-plasmon effect offering a promising approach to enhance their luminescence. Future research on improving efficiency and stability of PeLEDs could lead to advancements in lighting and display applications.
Article
Chemistry, Analytical
Shisong Yu, Kai Zhang, Xiangcheng Cai, Peng Tu, Yuanming Zhou, Fei Mei
Summary: Organic-inorganic perovskite materials have great potential in optoelectronic applications, and the appropriate amount of PMA can significantly enhance the performance of perovskite films and devices, especially in terms of increasing light emission intensity and current efficiency.
Article
Chemistry, Multidisciplinary
Chen-Min Yang, Fang-Chung Chen
Summary: Metal nanoparticles, specifically gold nanoparticles, have position effects on the performance of perovskite light-emitting diodes. The placement of the nanoparticles directly impacts the efficiency and intensity of the devices, with different layers showing varying levels of enhancement.
Review
Nanoscience & Nanotechnology
Baodan Zhao, Maria Vasilopoulou, Azhar Fakharuddin, Feng Gao, Abd. Rashid Bin Mohd Yusoff, Richard H. Friend, Dawei Di
Summary: Perovskite light-emitting diodes (LEDs) have shown great potential for display and lighting applications with external quantum efficiencies exceeding 20% for various colors. However, the majority of internally generated photons are trapped in the devices and lose energy through lossy channels, suggesting the need for effective light management strategies. By analyzing the intrinsic optical properties of perovskite materials and the extrinsic properties related to device structures, this Review highlights the possibility of substantially exceeding the conventional limits of planar organic LED devices and suggests new approaches for achieving ultrahigh efficiencies in perovskite LEDs.
NATURE NANOTECHNOLOGY
(2023)
Review
Nanoscience & Nanotechnology
Tzu-Yi Lee, Li -Yin Chen, Yu-Yun Lo, Sujith Sudheendran Swayamprabha, Amit Kumar, Yu-Ming Huang, Shih-Chen Chen, Hsiao-Wen Zan, Fang -Chung Chen, Ray-Hua Horng, Hao-Chung Kuo
Summary: Micro-light-emitting diodes (mu LEDs) are gaining significant attention in the display industry due to their exceptional optical and electrical characteristics. However, the high production cost and low external quantum efficiency (EQE) are major obstacles for their commercial usage. This article discusses the breakthroughs in mu LED technology, fabrication methods, optical/electrical characteristics, and challenges for display applications, offering potential solutions to address these challenges.
Article
Engineering, Chemical
Tzu-Hsueh Wu, Ganesh D. Sharma, Fang-Chung Chen
Summary: This article introduces a method of using TOPO treatment to passivate surface defects in single-crystal perovskite solar cells, thereby improving the photovoltaic performance and stability of the cells.
Article
Energy & Fuels
Hao-Yeu Tsai, Yung-Fang Yang, Hong-Sheng Jiang, Fang-Chung Chen
Summary: 2D perovskites with nearly vertically oriented Ruddlesden-Popper (RP) phases are grown using a vapor venting space-limited crystallization method, minimizing the impact of bulky side chains of the ammonium cations. Surface passivation is used to lower surface defects and improve power conversion efficiency (PCE), resulting in a PCE higher than 16%.
Article
Chemistry, Multidisciplinary
Tzu-Yi Lee, Tsau-Hua Hsieh, Wen-Chien Miao, Konthoujam James Singh, Yiming Li, Chang-Ching Tu, Fang-Chung Chen, Wen-Chung Lu, Hao-Chung Kuo
Summary: In this study, highly stable perovskite quantum dots (PQDs) coated with Al2O3 using atomic layer deposition (ALD) passivation technology were proposed. The passivation layer effectively protected the QDs from various conditions and exhibited excellent stability and reliability. By integrating with red phosphor, a white-light system with high data transmission rate was achieved.
Article
Chemistry, Physical
Mukhamed L. Keshtov, Dmitry Y. Godovsky, Ilya E. Ostapov, Vladimir G. Alekseev, Hemraj Dahiya, Rahul Singhal, Fang-Chung Chen, Ganesh D. Sharma
Summary: Researchers prepared a donor-acceptor conjugated polymer P(DTB-BDD) and achieved high power conversion efficiencies in solar cells by blending it with non-fullerene acceptors. By optimizing the weight ratios of the acceptors and keeping a constant amount of the donor, the performance of the solar cells can be further improved.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Mukhamed L. Keshtov, Alexei R. Khokhlov, Dimitriy Y. Shikin, Vladimir Alekseev, Giriraj Chayal, Hemraj Dahiya, Manish Kumar Singh, Fang Chung Chen, Ganesh D. Sharma
Summary: A new medium bandgap non-fullerene small-molecule acceptor (IDT-TC) was designed and compared with IDT-IC acceptor in terms of optical and electrochemical properties. IDT-TC exhibited higher crystallinity and electron mobility compared to IDT-IC. In polymer solar cells, using IDT-TC as the acceptor and P as the donor, achieved a higher power conversion efficiency.
Article
Chemistry, Multidisciplinary
Gajendra Suthar, Yu-Tang Hsiao, Kuen-Wei Tsai, Chuang-Yi Liao, Chih-Wei Chu, Yi-Ming Chang, Fang-Chung Chen
Summary: The impact of non-fullerene acceptor Y6-Se-HD on the performance of photomultiplication-type organic photodetectors is investigated. The results show that Y6-Se-HD can enhance the performance of the photodetectors by facilitating charge trapping and preventing charge recombination. The research highlights the importance of morphological effects on the performance of photomultiplication-type organic photodetectors.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Physics, Applied
Gautham Kumar, Fang-Chung Chen
Summary: Organic photovoltaics (OPVs) have the potential to become a new generation of energy sources due to their unique properties and high power conversion efficiencies under indoor and low-level lighting conditions. This article reviews recent progress in OPV devices for special applications such as the Internet of Things, wearable electronics, and sensors. It discusses the fundamental principles of OPVs, preparation and design of photoactive layers for indoor applications, the importance of interlayers, efforts to improve efficiencies using plasmonic nanostructures, and progress in large-area devices and modules for indoor applications.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Tzu-Yi Lee, Wen-Chien Miao, Yu-Ying Hung, Yi-Hong Bai, Pei-Tien Chen, Wei-Ta Huang, Kuan-An Chen, Chien-Chung Lin, Fang-Chung Chen, Yu-Heng Hong, Hao-Chung Kuo
Summary: This study proposes a novel structural design that combines blue and quantum well (QW)-intermixing ultraviolet (UV)-hybrid μ-LEDs to achieve high color-conversion efficiency (CCE). Through simulations, various combinations of QD and TiO2 concentrations and thickness variations are examined for their impact on photoluminescence efficiency (PLQY). The resulting high-efficiency color-conversion layer (CCL) saves time and material costs and enhances light absorption and illumination uniformity. The research also introduces a passivation protection layer and a modified distributed Bragg reflector (DBR) to improve device reliability and achieve high CCE values.
Article
Crystallography
Tzu-Yi Lee, Wei-Ta Huang, Jo-Hsiang Chen, Wei-Bo Liu, Shu-Wei Chang, Fang-Chung Chen, Hao-Chung Kuo
Summary: This study focuses on the innovation of mini light-emitting diode (mini-LED) backlight module designs. By optimizing the Mini-LED structure and utilizing optical simulation software and reinforcement learning algorithms, the illumination uniformity was improved, achieving impressive results.
Article
Nanoscience & Nanotechnology
Fu-He Hsiao, Tzu-Yi Lee, Wen-Chien Miao, Yi-Hua Pai, Daisuke Iida, Chun-Liang Lin, Fang-Chung Chen, Chi-Wai Chow, Chien-Chung Lin, Ray-Hua Horng, Jr-Hau He, Kazuhiro Ohkawa, Yu-Heng Hong, Chiao-Yun Chang, Hao-Chung Kuo
Summary: This study demonstrates the potential of InGaN-based red micro-LEDs with a single quantum well (SQW) structure for visible light communication applications. The SQW sample shows better crystal quality, with high-purity emission, narrower full width at half maximum, and higher internal quantum efficiency compared to InGaN red micro-LEDs with a double quantum wells (DQWs) structure. The SQW device exhibits higher maximum external quantum efficiency (5.95%) and experiences less blueshift with increasing current density compared to the DQWs device. Furthermore, the SQW device has a superior modulation bandwidth (424 MHz) and a data transmission rate of 800 Mbit/s at an injection current density of 2000 A/cm(2). These results indicate that InGaN-based SQW red micro-LEDs hold great promise for full-color micro-display and visible light communication applications.
Review
Materials Science, Multidisciplinary
Prateek Malhotra, Kanupriya Khandelwal, Subhayan Biswas, Fang-Chung Chen, Ganesh D. Sharma
Summary: The development and challenges of machine learning in organic solar cells are discussed. The flexibility of organic semiconductors offers new possibilities for discovering battery materials. Some progress has been made, and impactful techniques for extracting useful information have been identified. However, there are still limitations in the machine learning workflow.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Cheng-Han Sung, Shi-Da Huang, Gautham Kumar, Wen-Chi Lin, Chien-Chung Lin, Hao-Chung Kuo, Fang-Chung Chen
Summary: In this study, high photoluminescence quantum yield organic-inorganic hybrid perovskite quantum dots (PeQDs) were synthesized for light-emitting applications. The PeQDs, when mixed with polydimethylsiloxane, acted as a color-conversion layer (CCL) for quantum-dot light emitting diodes (LEDs) and achieved high power efficiency. By blending the PeQDs with polyvinylcinnamate, photopatternable thin films were formulated and patterned using UV light. The resulting perovskite quantum dot-polymer nanocomposites (PQD-PNCs) showed higher PLQY and stability, suggesting their potential as effective CCLs for future micro-LEDs.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Applied
Leping Chen, Yanfen Wang, Tingyu Shi, Tiantian Ma, Yang Li, Huayu Qiu, Shouchun Yin, Meier Gu
Summary: This study successfully overcame the limitations of the heavy atom effect by introducing iodine atoms and innovatively enhancing the structure while weakening stacking behavior, achieving high efficiency and precision in photodynamic therapy and photothermal therapy.
Article
Chemistry, Applied
Bingpeng Guo, Honghan Sa, Peng Zhang, Guiwen Hao, Mengyu Li, Qingqing Jiang, Baoying Li, Wei Shu, Changxiang Shao
Summary: The design of ratiometric fluorescence probes with large Stokes shift is of great significance in detecting and imaging target substances in complex organisms. In this study, a novel fluorophore with a large Stokes shift was easily obtained, and a fluorescence probe based on it demonstrated rapid response, high selectivity, and sensitivity towards peroxynitrite. The probe also showed excellent biocompatibility and remarkable mitochondrial targeting ability, making it suitable for proportional imaging of peroxynitrite in living cells and zebrafish.
Review
Chemistry, Applied
Haidong Huang, Xiaohui Wang, Xinyang Li, Yichen Li, Guojin Liu, Lan Zhou, Jianzhong Shao
Summary: This article introduces the application of responsive photonic crystals in anti-counterfeiting technology, with a focus on the preparation principle, classification, and preparation methods.
Article
Chemistry, Applied
Yunpeng Wang, Tao Zhao, Xiaoye Bi, Chencheng Lv
Summary: In this study, three novel carbene dyes were designed to achieve environmentally friendly dyeing processes. The dyes formed covalent bonds with fibers and exhibited good dyeing performance and high color fastness. These findings highlight the potential of the novel carbene dyes in promoting green production in the textile industry.
Review
Chemistry, Applied
Yizhe Yan, Xiaopei Zhu, Jia-Xin Cao, Yuan He, Shaoqing Li, Jian-Yong Wang
Summary: In this paper, 1,3,5-triazine dyes were successfully synthesized and their photophysical properties were studied. Two probes were selected for further investigation, showing promising applications in various fields.
Article
Chemistry, Applied
Xin Hu, Tongsheng Huang, Lihua Chen, Weifeng Zhu, Fengjie Deng, Xiancai Li, Jianwen Tian, Meiying Liu, Xiaoyong Zhang, Yen Wei
Summary: This study presents the synthesis of fluorescent cyclomatrix polyphosphazene spheres with aggregation-induced emission (AIE) feature and biodegradable potential for controlled drug delivery. The resulting micelles exhibit high water dispersibility, desirable fluorescence performance, and high drug loading capacity. They can effectively release the encapsulated drug in physiological solution and show excellent biological imaging ability and cytotoxicity against cancer cells.
Article
Chemistry, Applied
Yanzhu Liu, Yanghui Lei, Dongyan Li, Guangkui Li, Dongping Li, Yongxiu Li
Summary: In this study, luminescent lanthanide nanoparticles were synthesized as a dual emission turn-off probe for detecting 2,6-pyridinedicarboxylic acid (DPA) in water. The nanoparticles showed good dispersion and water stability, and achieved low detection limits for DPA. They also exhibited high recoveries in various samples.
Article
Chemistry, Applied
Jung Jae Do, Jong Ryeol Kwon, Donghan Kim, Jae Woong Jung
Summary: This study presents a defect passivation approach using coumarin dye as a multi-functional passivating agent of perovskite films to boost power conversion efficiency and operating stability of PSCs. The incorporation of coumarin dye improves the film morphology, enhances carrier extraction/transport, and suppresses trap-assisted recombination in the perovskite films. The optimized device demonstrates impressive reliability and practical applicability, maintaining over 90% of its initial PCE after being exposed to continuous indoor lighting irradiation for 2000 hours.
Article
Chemistry, Applied
Gang Wang, Yu-Chang Wang, Jing Lu, Wen-Fu Yan, Juan Jin, Yuan-Peng Wang, Jia-Jia Zhang, Hui-Jie Zhang, Hao Dong, Xi-Guang Liu
Summary: A new Ni(II) compound with good solid-state fluorescence performance and stability was synthesized, and it showed outstanding detection properties for various substances in aqueous solutions. This compound has the potential to be a multifunctional sensor.
Article
Chemistry, Applied
Luyao Wei, Shenglong Shang, Yu Zheng, Jie Liu, Ping Zhu
Summary: This study developed a facile method to create high saturation and durable structural colors on cotton fabrics. The colors are regulated by adjusting the size of magnetic particles and can be conveniently printed on fabrics using photo masks on transparent films.
Article
Chemistry, Applied
Zhao Jiang, Qing Zhang, Zhaoyu Kong, Ruijie Qiao, Zichuan Liu, Linzhou Song, Senqiang Zhu, Rui Liu, Hongjun Zhu
Summary: Three heteroleptic Ir(III) complexes with different electron-donating aryl groups were synthesized and their optical properties were investigated. It was found that all three complexes exhibited aggregation-induced phosphorescence emission (AIPE) behaviors, and the relationship between the size of organic ligands and AIPE behaviors was characterized. Ir-PhCz showed the best imaging of latent fingerprints due to its green light emission and high quantum yield.
Article
Chemistry, Applied
Zhijun Ruan, Chunxia Fan, Xuanrong Wang, Dong Shao, Xiaodong Yang, Wentao He, Tao Xu, Junqi Lin, Zhengfang Tian
Summary: A novel thioketal-based probe has been designed for rapid and accurate detection of mercury (II) ions, showing different fluorescence characteristics in various states. The probe exhibits excellent selectivity and specificity, making it suitable for Hg2+ detection in water solutions.
Article
Chemistry, Applied
Jianjun Huang, Xuan Zhao, Daniel Escudero, Luc Van Meervelt, Dongbin Zheng, Yuyu Fang, Wim Dehaen
Summary: A series of BOAHY compounds were successfully synthesized and showed versatile applications as a platform for designing novel fluorescent probes, especially in selective recognition.
Article
Chemistry, Applied
Roman V. Larkovich, Victoria E. Shambalova, Savva A. Ponomarev, Alexander S. Aldoshin, Boris N. Tarasevich, Konstantin A. Lyssenko, Valentine G. Nenajdenko
Summary: An efficient synthetic protocol for the preparation of novel 1,7-difluorinated BODIPYs was elaborated. Their photophysical properties were studied and the effect of 2,6-substituents was evaluated using DFT calculations.
Article
Chemistry, Applied
Haneul Kim, Byungjin Koo
Summary: In this study, a lithium ion sensing methodology based on fluorinated naphthalene compounds using 19F NMR and UV-vis spectroscopy is reported. The binding of lithium ions to the compounds is confirmed by changes in chemical shifts and peak broadening. Additionally, the effect of different crown ether ring sizes on the binding ability is observed. This study provides a new method for lithium ion sensing using spectroscopy.
