Article
Chemistry, Physical
Tianyuan Liang, Wenjie Liu, Xiaoyu Liu, Yuanyuan Li, Wenhui Wu, Jiyang Fan
Summary: A highly water-resistant total-inorganic green luminescent CsPbBr3/CsPb2Br5 core/shell heteronanocrystals (HNCs) were synthesized through an in situ phase-transition approach, maintaining nearly 100% of their original luminescence intensity after immersion in water for 11 months. These HNCs show strong competence in solid-state lighting and wide color-gamut displays.
CHEMISTRY OF MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Yunpeng Wang, Fei Wang, Gangbei Zhu, Quan Quan, Zhengxun Lai, You Meng, Yi Fan, SenPo Yip, Dongxu Zhao, Johnny C. Ho
Summary: CsPb2Br5/CsPbBr3 composite systems have attracted significant attention due to their enhanced photoluminescence intensity and moisture stability. However, the luminescence mechanism of CsPb2Br5-based materials remains controversial. In this work, high-quality CsPb2Br5 crystals were prepared to investigate their luminescent mechanisms. The results indicate that the green emission comes from CsPbBr3 attached and grown on CsPb2Br5 crystals. Ultrafast transient absorption measurements further reveal the dominance of intersystem crossing in the electron transfer process due to phonon scattering-assisted hopping at interfacial states. These findings provide insights into the luminescence of CsPb2Br5 materials and pave the way for designing and enhancing the fluorescence of materials for technological applications.
Article
Chemistry, Physical
Jiao Xun, Jidong Deng, Wei Shen, Ming Li, Rongxing He
Summary: The rapid synthesis of CsPbCl3?xBrx perovskite nanocrystals at room temperature provides a cost-effective and efficient method for industrial production of blue-emitting devices with precise control over photoluminescence wavelength and excellent stability and high photoluminescence quantum yields.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Qian Meng, Liya Zhou, Qi Pang, Xingli He, Tingying Wei, Jin Zhong Zhang
Summary: In this study, a novel approach for incorporating lead ions into manganese halide perovskite-analogue nanocrystals was developed, resulting in nanocrystals with strong orange emission and high stability. The Pb(2+)-incorporated nanocrystals show a significant enhancement in photoluminescence quantum yield, making them promising candidates for optoelectronic applications.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Nanoscience & Nanotechnology
M. A. Gokul, Atikur Rahman
Summary: All-inorganic lead-halide perovskites have attracted attention due to their excellent optoelectronic properties and high stability. However, the synthesis of alpha-Cesium lead iodide nanowires is challenging, and the exact mechanism of their growth using the hot-injection method is unclear.
Article
Nanoscience & Nanotechnology
Aditi Sahoo, Tufan Paul, Soumen Maiti, Rupak Banerjee
Summary: 2D CsPb2Br5 synthesized through chemical precipitation method exhibits high dielectric constant and low dielectric loss, showing great potential in energy harvesting and storage devices.
Article
Materials Science, Multidisciplinary
Wanyin Ge, Jindou Shi, Meimei Xu, Yuanting Wu, Hiroshi Sugimoto, Minoru Fujii
Summary: This study successfully synthesized colloidal CsPbBr3 perovskite quantum dots and investigated their downconversion and upconversion luminescence properties under UV light and IR lasers. The research demonstrated strong green emission from these quantum dots and the successful fabrication of a high-purity green LED device.
Article
Materials Science, Ceramics
Shiwei Xue, Hengbin Mao, Junhui Li, Xinge Sun, Ziyu Gong, Bingbing Fan, Gang Shao, Hailong Wang, Hongliang Xu, Rui Zhang, Hongxia Lu
Summary: All-inorganic lead halide perovskite nanocrystals have attracted attention in optoelectronics due to their excellent properties. However, the high lead content, low stability, and complex synthesis processes are major challenges. In this study, a dual-phase high-entropy perovskite material was synthesized by doping CsPbBr3 and CsPb2Br5 with B-site replacement using high-energy ball milling. The material exhibited good stability and optical performance.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Anna Lucia Pellegrino, Graziella Malandrino
Summary: This study successfully fabricated the all-inorganic halide perovskite CsPbBr3 through a surfactant-free one-pot synthesis in ethanol solution, achieving phase formation and growth of CsPb2Br5 microcrystals under specific conditions. Control of aging time and phase stability was found to be crucial in selectively and reproducibly obtaining CsPbBr3 or CsPb2Br5 phases. Promising results were obtained in photocatalytic degradation tests under UV light and visible light, with high degradation yields for both CsPbBr3 and CsPb2Br5.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Tianxinyu Bai, Shenwei Wang, Kexin Zhang, Chunyang Chu, Yingqiang Sun, Lixin Yi
Summary: This study aims to overcome the limitations of all-inorganic lead halide perovskite CsPbBr3 by constructing a novel core-shell structure and introducing the Cs4PbBr6 phase with 0D structure. The resulting CsPbBr3-Cs4PbBr6 films exhibit improved stability with only a 15% decrease in photoluminescence intensity after 100 days of storage under ambient air conditions. Furthermore, all-inorganic CsPbBr3-Cs4PbBr6-based LEDs demonstrate low turn-on voltage and long-term continuous operation under unencapsulated, ambient air conditions.
Article
Chemistry, Physical
Chao Wang, Jiawen Xiao, Zhengguang Yan, Xiaowei Niu, Taifeng Lin, Yingchun Zhou, Jingyu Li, Xiaodong Han
Summary: In this study, a colloidal synthesis method for lead-free bismuth-based halide perovskite nanocrystals was reported, and their growth mechanism and applications were investigated. Alloying was found to improve the optoelectronic properties and spatial resolution of perovskites, while maintaining a low detection limit.
Article
Chemistry, Multidisciplinary
Jindou Shi, Wanyin Ge, Ye Tian, Meimei Xu, Wenxing Gao, Yuanting Wu
Summary: By annealing perovskite materials in liquid, the luminescence stability can be significantly improved, offering a new approach for the commercialization of next-generation optoelectronic devices.
Review
Chemistry, Physical
Shuangyi Zhao, Wensi Cai, Huaxin Wang, Zhigang Zang, Jiangzhao Chen
Summary: Due to their nontoxicity, stability, and unique optoelectronic properties, all-inorganic lead-free halide semiconductors with perovskite and perovskite-like structures have emerged as promising optoelectronic materials for various applications, with a focus on the enhanced performances of ILFP single crystals compared to low dimensional and polycrystalline ILFP materials.
Article
Energy & Fuels
Hyeon Ju Tak, Ji Hyeon Lee, Yongseok Yoo, Hee Jeong Park, Woosum Cho, Sungkoo Lee, Jea Woong Jo, Seunghwan Bae
Summary: All-inorganic perovskites have high thermal stabilities and show promising performances for optoelectronic applications. This study presents a facile preparation method for all-inorganic CsPbBr3 perovskite powder, which demonstrates cost-effectiveness and high purity. The CsPbBr3 film prepared from this synthesized powder offers improved homogeneity and reduced defects, leading to higher power conversion efficiency and stability in perovskite solar cells.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Shunhong Dong, Zhi-Yi Hu, Ping Wei, Jingru Han, Zhao Wang, Jing Liu, Bao-Lian Su, Dongyuan Zhao, Yong Liu
Summary: This study reports the engineering of surface structure to tune the optoelectronic properties of halide perovskites. Uniform all-inorganic CsPbBr3 cubic/tetrahedral single-crystals with precise control of (100) and (111) surface anisotropy were designed and fabricated. The (100) surface engineering enables a lowest surface bandgap energy and high-rate carrier mobility, while the (111) surface enhances surface-defects-catalyzed reactions.
ADVANCED MATERIALS
(2022)
Review
Materials Science, Multidisciplinary
Teng Zhang, Mingkai Li, Jian Chen, Yang Wang, Liangshuang Miao, Yinmei Lu, Yunbin He
Summary: This review summarizes recent advances in the experimental and theoretical studies on bandgap engineering of Zinc Oxide (ZnO) through the formation of multi-component alloys, and discusses the development of related hetero-structures and optoelectronic devices. Efforts have been made to engineer the band structure of ZnO by substituting cations or anions, resulting in the desired material properties. Additionally, progress has been made in the development of ZnO alloy-based hetero-structures, which show potential for the development of optoelectronic devices.
MATERIALS SCIENCE & ENGINEERING R-REPORTS
(2022)
Article
Physics, Applied
Qiulin Qu, Qi Liu, Lufeng Chen, Yingxiang Li, Hang Pan, Jian Chen, Mingkai Li, Yinmei Lu, Yunbin He
Summary: In this study, amorphous Tm-Ga2O3 films were grown on flexible mica substrates for the development of photodetectors with broadened bandgap and lessened oxygen vacancies. These amorphous films exhibited high performance with low dark current and fast response speed, and maintained good performance after multiple bending cycles. This research sheds light on the potential of flexible devices based on amorphous Tm-Ga2O3 for solar-blind DUV detection.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Wenyu Fang, Xinglin Xiao, Haoran Wei, Yue Chen, Mingkai Li, Yunbin He
Summary: This study proposes three new kinds of 2D monolayer oxides, namely CrO2, MoO2, and WO2. The results of density functional theory (DFT) calculations show that these monolayer oxides exhibit high mechanical and dynamic stability, semiconducting properties, and high thermal conductivity. These properties suggest their potential applications in optoelectronic devices and thermal conductive components.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Bohan Liu, Mingkai Li, Wang Fu, Pan Ye, E. Wentao, Xinglin Xiao, Haoran Wei, Yinmei Lu
Summary: In this study, a p-SnO2:Mg/n-SnO2 homojunction-based ultraviolet photodetector was successfully fabricated, demonstrating excellent performance such as high rectifying ratio, ultra-fast response speed, and high photocurrent, responsivity, and detectivity.
Article
Chemistry, Physical
Wenyu Fang, Haoran Wei, Xinglin Xiao, Yue Chen, Mingkai Li, Yunbin He
Summary: This article investigates the thermoelectric properties of three two-dimensional materials SnX (X = O, S, Se). These materials exhibit high stability, are direct band gap semiconductors, and have low thermal conductivity at low temperatures, making them suitable for thermoelectric device applications.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Wenyu Fang, Kuan Kuang, Xinglin Xiao, Haoran Wei, Yue Chen, Mingkai Li, Yunbin He
Summary: Two-dimensional materials, MgAl2Se4 and MgIn2Se4, possess low thermal conductivity and high electrical properties, showing potential applications in nanoelectronics and thermoelectric devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Yingxiang Li, Zebin Zhou, Hang Pan, Jian Chen, Yuchao Wang, Qiulin Qu, Dongjiu Zhang, Mingkai Li, Yinmei Lu, Yunbin He
Summary: A self-driven solar-blind ultraviolet photodetector (SBUVPD) was developed by depositing a b-Ga2O3 thin film on a commercially available fluorine doped tin oxide (FTO) substrate using pulsed laser deposition, with multi-layer graphene (MLG) as the top electrode. The introduction of MLG significantly enhanced the photocurrent and responsivity of the photodetector. The device exhibited excellent detection performance, delivering a high photocurrent of 31 nA towards 250 nm-light with an ultra-fast response speed and a maximum responsivity of 9.2 mA/W.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
Shuang Yan, Gaochen Yang, Huanfeng He, Qi Liu, Qingqi Peng, Jian Chen, Mingkai Li, Yinmei Lu, Yunbin He
Summary: In this study, Hf0.5Zr0.5O2/beta-Ga2O3 heterojunction-based self-driven solar-blind UV photodetectors were constructed by combining ferroelectric Hf0.5Zr0.5O2 material with Ga2O3. The optimized device with a HfZrO2 layer thickness of 10 nm showed remarkable responsivity and detectivity, outperforming single Ga2O3-based devices. The device's performance could be adjusted by varying the poling states of HfZrO2 and showed significant enhancement in the upward poling state.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Energy & Fuels
Jing Yang, Chuwu Xing, Qinhui Bao, Le Zhang, Shuai Huang, Duofa Wang, Tianjin Zhang
Summary: This study presents an interface engineering that reinforces the operation stability of FACsPbI(3) perovskite solar cells (PSCs) by introducing a multifunctional ligand CEPPA modification layer. CEPPA passivates oxygen vacancy defects and reduces defect states on SnO2 films. Additionally, optimized energy level arrangement leads to better electron extraction and transport. The power conversion efficiency (PCE) of the FACsPbI(3) device increases from 16.33% to 17.78% and the CEPPA-modified SnO2 shows better phase and moisture stability.
Article
Chemistry, Multidisciplinary
Miao He, Xinyu Xu, Le Zhang, Fei Lu, Chuwu Xing, Duofa Wang, Tianjin Zhang
Summary: Perovskite solar cells have shown significant improvements in power conversion efficiency, with even higher efficiencies possible. This study examines the impact of introducing the organic molecule dibenzo-18-crown-6 (DC) to CsPbI2Br perovskite precursor solution on the phase, morphology, and optical properties of perovskite films. Experimental results reveal that the efficiency of the photovoltaic device gradually increases with the increase of DC concentration, reaching its highest efficiency of 11.57% at a concentration of 0.3%. The presence of DC molecules effectively controls the perovskite crystallization process.
Article
Materials Science, Ceramics
Jian Chen, Jiaxing Mao, Zihui Wang, Yanhui Dong, Jinming Guo, Mingkai Li, Yi Zhang, Yinmei Lu, Yunbin He
Summary: In this work, lead-free ceramics with narrow bandgaps and large remanent polarization are obtained via Fe2O3 doping. The optimized ceramic possesses a narrow bandgap of 1.74 eV and a large remanent polarization of 27.05 muC/cm2. Furthermore, a switchable photovoltaic effect is observed in the ceramic-based device.
JOURNAL OF ADVANCED CERAMICS
(2023)
Article
Physics, Applied
Hao Lu, Lei Li, Zhiwu Tang, Maji Xu, Yonghui Zheng, Martin Becker, Yinmei Lu, Mingkai Li, Pai Li, Zaoli Zhang, Peter J. J. Klar, Yunbin He
Summary: We explore the possibility of tuning the metal-to-insulator transition (MIT) of crystalline VO2 thin films by strain engineering. Thin VO2 films on TiO2 (110) substrates are almost fully strained up to thicknesses of about 20 nm and exhibit tensile strain along the c axis of the (high-temperature) metallic rutile phase leading to an increase in the MIT temperature by as much as 30 & DEG;C in comparison to the almost fully relaxed 300 nm-thick VO2 film. The strain gradient within the thicker samples leads to a continuous serial switching of layered regions of the VO2 film from the insulating to the metallic state with increasing temperature.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Yue Chen, Wenyu Fang, Fengxin Liu, Kuan Kuang, Xinglin Xiao, Haoran Wei, Mingkai Li, Yunbin He
Summary: Based on first-principles calculations, the properties and characteristics of Au contacts on different SnO2 interfaces were investigated. The Schottky barrier height (SBH) was found to strongly depend on the interface structure and the presence of oxygen vacancies (VO) in the SnO2 layer. Additionally, doping with low-valence elements can alter the contact properties. The modulation effect of SBH is mainly caused by the rearrangement of interfacial potentials and results in different SBH values.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Pan Huang, Lufeng Chen, Daotian Shi, Qi Liu, Jian Chen, Mingkai Li, Yinmei Lu, Jinming Guo, Yunbin He
Summary: In this study, high-quality beta-Ga2O3 thin films were heteroepitaxially grown on MgO(100) substrates using pulsed laser deposition, and highly-sensitive solar-blind ultraviolet photodetectors were achieved. The beta-Ga2O3 films were single-phase, (100)-oriented, and atomically-smooth with unique columnar nanodomains of 8-12 nm width.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Junnian Chen, Xingfu Xiao, Yue Chen, Mingkai Li, Wenyu Fang, Zixian Yu, Biqi He, Tianyou Zhai, Yunbin He
Summary: This study reports a method of modulating the structural distortion by steric hindrance effects to change the morphology of bismuth bromide chains. By interacting with bismuth bromide, N,N,N & PRIME;,N & PRIME;-tetramethyl-1,4-phenylenediammonium (TMPD)(2+) is used to template regular BiBr5 chains, resulting in a narrow-bandgap mixed 0D/1D (TMPD)(2)(Bi2Br10H2O)-H-. This finding offers new insights into developing narrow-bandgap perovskite hydrates for practical optoelectronic applications.
ADVANCED OPTICAL MATERIALS
(2023)
