Review
Physics, Applied
Qionghua Mo, Yingrui Shi, Wensi Cai, Shuangyi Zhao, Yuansong Ying, Zhigang Zang
Summary: This review discusses the progress of low-dimensional hybrid metal halides in WLEDs, highlighting their high PLQY, ultra-broadband emission, and easy synthetic procedures. It also summarizes the colors available in low-dimensional hybrid metal halides and focuses on white light-emitting diodes based on these materials. Discussions on the evolution, challenges, and limitations of current materials used in WLEDs are included to provide insights for future development directions.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Xuan Meng, Sujun Ji, Qiujie Wang, Xiaochen Wang, Tianxin Bai, Ruiling Zhang, Bin Yang, Yimeng Li, Zhipeng Shao, Junke Jiang, Ke-li Han, Feng Liu
Summary: This study presents an organic-inorganic hybrid cuprous (Cu+)-based metal halide MA(2)CuCl(3) that meets the requirements of nontoxicity, high PLQY, and dopant-free. Both single crystals and thin films of MA(2)CuCl(3) can be easily prepared by a low-cost solution method, exhibiting bright warm white-light emission with high PLQYs of 90-97%. Prototype electroluminescence devices and down-conversion LEDs fabricated with MA(2)CuCl(3) demonstrate bright luminescence with decent efficiencies and operational stability, suggesting its great potential for single-component indoor lighting and display applications.
Article
Chemistry, Physical
Qiang Zhang, Xicheng Wang, Xiaopeng Zhou, Yuhua Wang
Summary: In this study, Rb2Sr1-yCayP2O7:xEu(2+) solid solutions with yellow-orange color-tunable luminescence were designed for potential applications in WLEDs, showing high efficiency and good performance. By combining BAM:Eu2+ and Rb2SrP2O7:0.5% Eu2+ phosphors with a 380 nm n-UV chip, a WLED device was successfully fabricated to emit white light with good performance.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Mahdi Gassara, Rawia Msalmi, Xinghui Liu, Fredj Hassen, Anna Moliterni, Naoufel Ben Hamadi, Ahlem Guesmi, Lotfi Khezami, Taoufik Soltani, Houcine Naili
Summary: A new one-dimensional perovskite material, 4-BAPC, was successfully synthesized and characterized. The material exhibits stability and high color temperature, making it suitable for various applications in optoelectronic devices.
Article
Chemistry, Multidisciplinary
Shuang-Qiao Sun, Yating Cai, Min Zhu, Wei He, Bo-Chen Liu, Yan-Lin Xu, Xuan Lv, Qi Sun, Pengyi Liu, Tingting Shi, Yue-Min Xie, Man-Keung Fung
Summary: A hybrid perovskite/organic tandem white LED structure design successfully addresses the challenge of depositing multi-layered white PeLEDs and achieves high-efficiency white light emission. The performance of blue PeLEDs is optimized using a conductive passivator, and the highest efficiency POTWLEDs are obtained through the tandem structure.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhibin Wang, Naizhong Jiang, Menglong Liu, Ruidan Zhang, Feng Huang, Daqin Chen
Summary: This study demonstrates white CDs-LEDs with adjustable CCTs through the utilization of aggregation-induced emission, achieving white LEDs with different color temperatures. These LEDs exhibit excellent brightness and external quantum efficiency performance.
Article
Materials Science, Multidisciplinary
Weidong Sun, Shujie Jiao, Shuaibing Li, Danyang Zhang, Xiaoyang Xia, Liang Zhou
Summary: Highly efficient hybrid white organic light-emitting diodes (WOLEDs) with tunable spectrum were constructed using a tandem structure composed of a blue thermally activated delayed fluorescent (TADF) unit and a bluish-green TADF/red phosphorescent unit (with a red ultrathin light-emitting layer (EML) inserted into the bluish-green EML). The WOLED exhibited maximum external quantum efficiency (EQE) of 44.26% and achieved a spectrum-tunable cool white emission. By introducing an ultrathin red TADF EML, the WOLED showed a color shift from cool to warm white.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Hongting Chen, Hengyang Xiang, Yatao Zou, Shuai Zhang, Bo Cai, Jibin Zhang, Lintao Hou, Haibo Zeng
Summary: This Perspective article focuses on the potential and challenges of metal halides with self-trapped exciton (STE-MHs) as single-layer emitters in white light-emitting diodes (WLEDs), and proposes possible approaches and future research directions to improve the efficiency of WLEDs based on STE-MHs.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Zhuangzhuang Ma, Zhifeng Shi, Dongwen Yang, Yawen Li, Fei Zhang, Lintao Wang, Xu Chen, Di Wu, Yongtao Tian, Yu Zhang, Lijun Zhang, Xinjian Li, Chongxin Shan
Summary: This study introduces a two-component strategy using two broadband emissive materials with self-trapped excitons (STEs) to produce high CRI and stable WLEDs. By synthesizing copper-based ternary halides composites, the research demonstrates cold/warm tunable WLEDs with high CRI and excellent stability. These results highlight the potential of using hybrids of STEs-derived broadband emissive materials for high-performance WLEDs.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Tingming Jiang, Wenbo Ma, Hao Zhang, Yue Tian, Gang Lin, Wenge Xiao, Xue Yu, Jianbei Qiu, Xuhui Xu, Yang (Michael) Yang, Dianxing Ju
Summary: Environmentally friendly metal halides, such as tetramethylammonium manganese chloride and tetraethylammonium bromide, have been synthesized and shown to have high photoluminescence quantum yields and good environmental stability. When blended in white light-emitting diodes, they display outstanding luminous efficacy. Under X-ray excitation, these materials demonstrate steady-state X-ray light yields and radiation hardness.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Zixin Fang, Yan Huang, Sunhuizi Cheng, Quanshui Zhu, Weiwei Zhang, Feng Zhao, Gaoxiang Huang, Guangyu Jiang, Feng Li
Summary: Quaternary alloyed quantum dots Ag-Zn-In-S(AZIS)/ZnS with tunable emission were prepared. White light-emitting diodes (WLEDs) based on these QDs showed high color rendering index and correlated color temperature. The redshift issue was effectively addressed by coating the QDs with a silica shell.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Electrical & Electronic
Zhe Wang, Yongtong Wang, Qing Wang, Jinglong Liu, Yun Mou, Yang Peng, Mingxiang Chen
Summary: Luminescence-tunable high-power white light-emitting diodes (WLEDs) were fabricated by printing phosphor-in-silicone on 3-D ceramic substrates with adjusted dam structure. The dam height and angle influenced the optothermal performances of the WLEDs, but had no significant impact on the surface temperature. The fabricated WLEDs offer tunable luminescence and low working temperature.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Chemistry, Multidisciplinary
Hong Gao, Miaomiao Wang, Yifan Mao, Qingsong Zhao, Cheng Zhang, Ling Jin, Youyi Xia, Weijin Li, Kui Zhang, Haibo Zeng
Summary: Currently available encapsulating materials for WLEDs have limitations, but this study developed promising materials with two significant advantages: direct encapsulation without phosphors and reprocessing for recycling. Blue-light-emitting vitrimers (BEVs) were prepared by reacting epoxy resin with amines, showing strong blue emission and fast stress relaxation. To achieve white-light emission, a well-designed yellow component was grafted into the BEVs, resulting in white-light-emitting vitrimers (WEVs). Using WEV as an encapsulating adhesive, stable white light with CIE coordinates (0.30, 0.32) was successfully achieved for 365nm LED chips without inorganic phosphors, indicating a promising future for WLED encapsulation.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Qiqiong Ren, Jian Zhang, Yilin Mao, Maxim S. Molokeev, Guojun Zhou, Xian-Ming Zhang
Summary: Zero-dimensional hybrid manganese halides have shown promise for white light-emitting diodes due to their excellent optical properties. In this study, novel manganese bromides were reported by screening ligands with similar atomic arrangements but different steric configurations. The spatial configuration of the manganese bromides was found to significantly influence their photoluminescence properties.
Article
Chemistry, Physical
Kai Chen, Zhipeng Wei
Summary: This study achieved high-efficiency single emissive layer white organic light-emitting diodes by controlling the doping concentration of two guest materials, resulting in tunable EL spectrum with increasing voltage and enhanced color temperature range coverage.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Shengqiang Liu, Yuantian Zheng, Dengfeng Peng, Jing Zhao, Zhen Song, Quanlin Liu
Summary: NIR ML materials, such as gallate spinel and gallate magnetoplumbite doped with Cr3+, have shown bright NIR ML behavior under low load and exhibit excellent tissue penetration and concealment capability. They have great potential in the fields of bio-medicine and anti-counterfeiting.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Niu Sun, Jiawei Lin, Shihui He, Jindong Cao, Zhongnan Guo, Jing Zhao, Quanlin Liu, Wenxia Yuan
Summary: We report a novel 0D In-based OIMH (C10H22N2)2In2Br10 with intrinsic broadband emission (610 nm) and a high photoluminescence quantum yield (PLQY) of 70% without Sb doping.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Chao Dou, Shengqiang Liu, Fangyi Zhao, Zhen Song, Quanlin Liu
Summary: This study reports on how the external quantum efficiency (EQE) of Eu2+-doped Ba(K)-beta-Al2O3 blue-emitting phosphor can be significantly improved through lattice site engineering. By partially substituting K+ for Ba2+, the crystallographic site and coordination polyhedron of Eu2+ change, leading to the red shift of the excitation spectrum. The optimized blue-emitting (B0.4K1.6)(0.84)AO:Eu phosphor shows an EQE of up to 53% under violet light excitation.
INORGANIC CHEMISTRY
(2023)
Article
Optics
Shengqiang Liu, Rujun Yang, Hao Cai, Yixi Zhuang, Zhen Song, Lixin Ning, Quanlin Liu
Summary: This study reports the electron tunneling charging behavior in Cr3+, Sm3+ co-doped near-infrared persistent luminescence material SrGa12O19, allowing for efficient charging by incoherent visible light. The electrons are efficiently captured by nearby Ga-II-O2- electron-hole trap centers via a tunneling process and transferred to shallow traps through a persistently energetic optical pump. The PersL performance is further optimized by engineering the energy band through partial substitution of In3+ for Ga3+. Insights into electron tunneling charging under low-energy excitation for near-infrared persistent luminescence are provided, inspiring more explorations for practical applications.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Shihui He, Shiqiang Hao, Liubing Fan, Kunjie Liu, Chuxin Cai, Christopher Wolverton, Jing Zhao, Quanlin Liu
Summary: Five 0D Zn-based hybrid halides with aromatic organic cations of different carbon-chain lengths were synthesized, and (PMA)2ZnCl4 exhibited the highest photoluminescence quantum yield among reported Zn-based white-emission OIMHs. (PBA)2ZnI4 showed the highest color rendering index among single-component white-light-emitting phosphors. The study demonstrated that the selection of appropriate organics and halogens can enable fine tuning of single-component white-light emission, satisfying varying needs for solid-state lighting.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
An Hou, Liubing Fan, Yan Xiong, Jiawei Lin, Kunjie Liu, Mingyue Chen, Zhongnan Guo, Jing Zhao, Quanlin Liu
Summary: Three new organic-inorganic metal halides (OIMHs) with efficient luminescent properties and broadband emission due to Sb3+ electron transitions are reported. The incorporation of Sb3+ significantly enhances the photoluminescence properties, demonstrating the potential applications of these compounds in solid-state lighting.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Na Wang, Shiqiang Hao, Yan Xiong, Mingyang Li, Kunjie Liu, Christopher Wolverton, Yonggang Wang, Jing Zhao, Quanlin Liu
Summary: The study presents a new compound (NH4)3In0.95Sb0.05Cl6 that exhibits efficient broad-band emission and good thermal stability for potential solid-state lighting applications. The material shows remarkable resistance to thermal quenching and can be used to fabricate high color rendering white light-emitting diodes.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Yongcheng Huo, Hao Cai, Yuhe Shao, Zhen Song, Quanlin Liu
Summary: In this work, Yb3+ luminescence, responsive to visible light, is achieved by utilizing energy transfer from Cr3+ in Mg2GeO4. The introduction of Yb3+ leads to intense NIR luminescence peaking at 974 nm. The preferential occupation of Yb3+ ions and the energy transfer process in Mg2GeO4 are investigated through local structure analysis. The potential application of Mg2GeO4:Cr3+, Yb3+ as thermometers is demonstrated based on the properties of thermally coupled anti-Stokes and Stokes emissions of Yb3+, and the sensitive variation of the emission intensity.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Shangqing Qu, Jinhao Chen, Jikun Chen, Guohong Cai, Yonggang Wang, Zhongnan Guo, Jing Zhao, Quanlin Liu
Summary: We report the synthesis of a quaternary selenide, In0.5Mn2Bi3.5Se8, which shows good thermal stability and has potential for thermoelectric applications. It exhibits semiconductor properties with electrical conductivity and Seebeck coefficient exceeding 3 S/cm and 300 μV/K at 810 K. This finding enriches our understanding of the pavonite homologous series and provides valuable insights for future exploration in related fields.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Optics
Yuhe Shao, Hao Cai, Fangyi Zhao, Zhen Song, Quanlin Liu
Summary: This study presents a new blue-violet phosphor SrSc4Si5O17:Ce3+ with a small stokes-shift, which exhibits efficient luminescence. The fabricated white light-emitting diodes show excellent color rendering index, indicating the potential of this phosphor in indoor healthy lighting and agricultural lighting applications.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Chao Dou, Chuxin Cai, Zhen Song, Quanlin Liu
Summary: By partially replacing Al3+ with Ga3+, the photoluminescence intensity, internal/external quantum efficiency, and thermal stability of NIR phosphors are improved, resulting in a high electro-optical efficiency for NIR pc-LED devices.
ADVANCED OPTICAL MATERIALS
(2023)
Correction
Multidisciplinary Sciences
Zhen Song, Quanlin Liu
ADVANCED THEORY AND SIMULATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Jindong Cao, Kunjie Liu, Mingzhen Quan, An Hou, Xingxing Jiang, Zheshuai Lin, Jing Zhao, Quanlin Liu
Summary: Mixing cations with different chemical properties is a new approach for tuning the optical properties of hybrid organic-inorganic metal halides (HOIMHs). In this study, zero-dimensional (C9N3H15)(C9H13SO)MBr6 (M = Bi/Sb) with two different cations were synthesized, resulting in significant second harmonic generation. The synthesized compounds exhibited direct bandgaps and bright yellow emission due to fluorescence emission.
DALTON TRANSACTIONS
(2023)
Article
Materials Science, Multidisciplinary
Chuxin Cai, Shengqiang Liu, Fangyi Zhao, Hao Cai, Zhen Song, Quanlin Liu
Summary: Efficient Cr3+-doped Ca3Al2-yScyGe3O12 garnet phosphors were designed to enhance NIR luminescence efficiency through octahedral distortion. The composition with y = 0.2 showed the highest luminescence intensity, and the optimal Ca3Al1.8Sc0.2Ge3O12:0.04Cr(3+) phosphor exhibited excellent thermal stability and high NIR output power.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Inorganic & Nuclear
Liubing Fan, Shiqiang Hao, Shihui He, Xusheng Zhang, Mingyang Li, Christopher Wolverton, Jing Zhao, Quanlin Liu
Summary: In this study, three hybrid metal halides (Bmpip)(2)ZnBr4, (Bmpip)(2)CdBr4, and (Bmpip)(8)Pb11Br30 were synthesized and characterized. These compounds exhibit excellent stability and broad emissions. The emission mechanisms involve both the organic cations and self-trapped excitons (STEs) in (Bmpip)(2)ZnBr4 and (Bmpip)(2)CdBr4, while in (Bmpip)(8)Pb11Br30, the emission is mainly attributed to STEs. This work contributes to our understanding of the structure types and diverse emission mechanisms of hybrid metal halides.
DALTON TRANSACTIONS
(2023)
