Article
Chemistry, Inorganic & Nuclear
Runan Chen, Chen Sun, Xiaohua Cheng, Yufan Lin, Jiaqian Zhou, Jun Yin, Bin-Bin Cui, Lingling Mao
Summary: Organic-inorganic hybrid metal halides with tunable optical band gaps and emission properties were obtained by using pyridinium derivatives as organic templating cations. Among the synthesized 1D lead bromide compounds, only (2,4-LD)PbBr3 exhibited exciton-dependent emission from intense yellow-white to weak red-white. Comparisons of its photoluminescence with its bromate and other similar structures confirmed the contribution of organic cations and self-trapped excitons to the tunable emission. Density functional theory calculations revealed a stronger interaction between organic and inorganic components in (2,4-LD)PbBr3 compared to (2-MP)PbBr3. This work emphasized the importance of organic templating cations in hybrid metal halides and the new functionalities associated with them.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Xia Cai, Yan Li, Jianfei Liu, Hao Zhang, Jianguo Pan, Yiqiang Zhan
Summary: This study utilizes ensemble machine learning to search for non-toxic and high-performance all-inorganic lead-free perovskites for use in solving the challenges of efficiency, stability, and toxicity in perovskite solar cells. Through the establishment of structure identification and band gap classification models, as well as the proposal of a physics-inspired multi-component neural network, suitable candidates are screened. Based on first principles calculations, 17 candidates with theoretical power conversion efficiencies over 20% are identified.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Physical
G. Krishnamurthy Grandhi, Rakesh Dhama, Noolu Srinivasa Manikanta Viswanath, Ekaterina S. Lisitsyna, Basheer Al-Anesi, Jayanta Dana, Vipinraj Sugathan, Humeyra Caglayan, Paola Vivo
Summary: The perovskite-inspired Cu2AgBiI6 (CABI) absorber holds potential for low toxicity indoor photovoltaics. However, the self-trapping of carriers in CABI reduces its photovoltaic performance. Through the analysis of the excited-state dynamics of CABI, it is found that photoexcitation in CABI leads to the formation and luminescence of self-trapped states. The understanding of this self-trapping phenomenon is crucial for optimizing the optoelectronic properties of CABI and can be achieved through compositional engineering.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Jian-Qiang Zhao, Chen Sun, Meng Yue, Yan Meng, Xian-Mei Zhao, Le-Ran Zeng, Guang Chen, Cheng-Yang Yue, Xiao-Wu Lei
Summary: A new type of hybrid lead halide compound, [DTHPE](2)Pb3Cl10, with a one-dimensional chain structure based on a corner-shared [Pb3Cl11] cluster has been synthesized. This cluster-based 1D chain exhibits intrinsic broadband white light emission with a high quantum efficiency of 19.45%, surpassing that of typical two-dimensional perovskites reported previously.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Zhikai Qi, Huizhi Gao, Xuelian Yang, Yali Chen, Fu-Qiang Zhang, Mei Qu, Shi-Li Li, Xian-Ming Zhang
Summary: This study presents a new one-dimensional lead iodide hybrid with face-sharing PbI6 octahedral chains, showing broadband yellow emissions due to self-trapped excitons associated with distorted Pb-I lattices. The material is identified as an indirect bandgap semiconductor, with band structures mainly governed by the inorganic components. This work represents the first instance of a broadband emitter based on a one-dimensional face-shared lead iodide hybrid, offering a new approach to novel broadband emission materials.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Ao Chen, Xiaoling Jing, Tianyuan Wang, Tingting Zhao, Yu Zhang, Donglei Zhou, Rui Sun, Xueting Zhang, Ran Liu, Bo Liu, Quanjun Li, Bingbing Liu
Summary: This study synthesized and studied Cs2AgInCl6DPnanocrystals to clarify their structural-optical properties, including a broad emission due to exciton self-trapping and an abnormal blue-shifted emission caused by reduced electron-phonon coupling under compression.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Mohamed Saber Lassoued, Yuan-Chao Pang, Qian-Wen Li, Xinkai Ding, Bo Jiao, Hua Dong, Guijiang Zhou, Shujiang Ding, Zhicheng Zhang, Zhaoxin Wu, Gaoyang Gou, Zongyou Yin, Ju Li, Yan-Zhen Zheng
Summary: The study introduces two new semiconducting 2D organic-inorganic hybrid materials with broadband yellow-green emission and strong photocurrent responses. These materials exhibit high photocurrent difference between light and dark conditions, making them among the highest current obtained in 2D lead iodide hybrid materials. Additionally, the materials are stable under various conditions, making them promising for realistic applications in light detection.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Physical
Jung -Min Heo, Himchan Cho, Seong-Chul Lee, Min -Ho Park, Joo Sung Kim, Hobeom Kim, Jinwoo Park, Young-Hoon Kim, Hyung Joong Yun, Eojin Yoon, Dong-Hyeok Kim, Soyeong Ahn, Sung-Joo Kwon, Chan-Yul Park, Tae-Woo Lee
Summary: By introducing co-additives, the number of nucleation sites in CsSnBr3 film can be increased, resulting in uniform films with improved defect passivation. This approach can significantly increase the brightness and device lifetime of perovskite light-emitting diodes.
ACS ENERGY LETTERS
(2022)
Article
Engineering, Environmental
Youyu Liu, Zhi Xie, Wei Zheng, Ping Huang, Zhongliang Gong, Wei Zhang, Zhiqing Shao, Dengfeng Yang, Xueyuan Chen
Summary: In this study, a strategy to achieve efficient narrow-band blue photoluminescence (PL) in 0D Cs2ZnBr4 nanocrystals (NCs) by doping with minor Pb2+ was reported. The doped Cs2ZnBr4 NCs exhibited efficient luminescence with a sharp emission peak at 433 nm and a high quantum yield of 82.9%. The narrow-band blue PL originated from the peculiar electronic band structure induced by Pb2+ doping, where the photogenerated excitons were trapped and localized within [ZnBr4](2-) tetrahedra. Furthermore, by controlling the Pb2+ concentration, dual-band-tunable blue/green PL was achieved in Cs2ZnBr4: Pb2+/CsPbBr3 hybrid NCs with improved stability compared to bare CsPbBr3. These findings provide a unique approach to achieve highly efficient narrow-band PL in metal halide NCs through minor Pb2+ doping, which has significant implications for materials design and device engineering in practical applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Li-Juan Feng, Yan-Yu Zhao, Ru-Yang Song, Xiao-Wu Lei
Summary: Three new one-dimensional face-shared octahedral perovskites, [DTHPE]Pb2Br6 (1), [TMPDA]PbBr3 (2), and [MPD]PbBr3 (3), with unified APbBr(3) composition, have been synthesized. These 1D perovskites exhibit tunable broadband luminescence from orange to blue, which is attributed to the radiative recombination of self-trapped excitons due to strong electron-phonon coupling.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Yan Gao, Xiaohong Li, Weiwei Liu, Xiangyuan Xing, Hua Long, Kai Wang, Bing Wang, Peixiang Lu
Summary: In this study, a highly tunable enhancement and switching of nonlinear emission from metal halide perovskites were demonstrated using an asymmetrically biased metal-insulator-semiconductor structure. The enhancement of two-photon-pumped photoluminescence was achieved by electric-field-induced passivation/activation of Br vacancies, ranging from approximately 61.2-fold to 370.3-fold. Efficient modulation of two-photon-pumped lasing with a high on/off ratio of 67:1 was also demonstrated.
Article
Materials Science, Multidisciplinary
Noolu Srinivasa Manikanta Viswanath, Tuhin Samanta, Yeongjun Yoon, Sung Woo Jang, Kyeounghak Kim, Won Bin Im
Summary: This study reports a 0D completely inorganic luminescent material, K2SbCl5, with good stability and high luminescence efficiency. Through density functional theory calculations, it is confirmed that the [SbCl5]2- square pyramidal units are the only optically active emission centers. The white light-emitting device fabricated from K2SbCl5 exhibits impressive performance metrics, including a substantial color rendering index and exceptional luminous efficacy.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Le Wang, Haochen Sun, Chun Sun, Da Xu, Jiaqi Tao, Tong Wei, Zi-hui Zhang, Yonghui Zhang, Ziying Wang, Wengang Bi
Summary: A lead-free orange-red-emitting compound with high photoluminescence quantum yield was successfully synthesized, showing superior stability and retaining 60% of its initial photoluminescence intensity after 60 days in water. This compound has potential applications in optoelectronic devices.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Lidia Romani, Andrea Speltini, Francesco Ambrosio, Edoardo Mosconi, Antonella Profumo, Marcello Marelli, Serena Margadonna, Antonella Milella, Francesco Fracassi, Andrea Listorti, Filippo De Angelis, Lorenzo Malavasi
Summary: This study presents a water-stable metal halide perovskite and demonstrates its application in promoting photocatalysis in aqueous medium, leading to impressive hydrogen evolution rate. The composite with g-C3N4 shows synergistic activity and efficient photocatalytic performance in water, paving the way for a new class of light-driven catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Rui Yun, Huanxin Yang, Yue Li, Yuling Liu, Yiyue Chu, Xiaodan Zhang, Libing Zhang, Xiyan Li, Suli Wu, Xiaowang Liu
Summary: A transformation strategy mediated by an inorganic ligand (NOBF4) was developed to obtain blue-emitting CsPbBr3 nanoplates (NPLs). The transformation process involved the dissolution and recrystallization of Cs4PbBr6 nanocrystals in a nonpolar environment, resulting in the formation of pure blue-emitting NPLs with a line width of about 12 nm. The reorganization of organic ligands tuned by NO+ played a crucial role in the formation of NPLs. This work provides an effective strategy for obtaining pure blue-emitting NPLs and offers a platform for exploring the mechanism of anisotropic growth in perovskite crystals.
CHEMISTRY OF MATERIALS
(2023)
Article
Optics
Kai Han, Jianwei Qiao, Shuai Zhang, Binbin Su, Bibo Lou, Chong-Geng Ma, Zhiguo Xia
Summary: A design method is established by considering charge-transfer and recombination efficiencies in doped MHPs materials, improving the luminescence performance of MHP scintillators. Alloying Te4+ into Cs2ZrCl6 significantly enhances scintillation performance, including increased light yield and detection limit, as well as high-resolution X-ray imaging capabilities.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Binbin Su, Jiance Jin, Kai Han, Zhiguo Xia
Summary: This study successfully designs a new lead-free metal halide scintillator with high light yield, low detection limit, large X-ray attenuation efficiency, and stable and nontoxic compositions. It also develops a universal strategy for the preparation of large-sized scintillator screen in nondestructive X-ray imaging.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Yingze Zhu, Xuesong Wang, Jianwei Qiao, Maxim S. Molokeev, Hendrik C. Swart, Lixin Ning, Zhiguo Xia
Summary: To promote the development of NIR light sources, the researchers discovered a novel Eu2+-activated broadband NIR-emitting phosphor and investigated its design principles and mechanism using density functional theory calculations. The results showed that with an increase in the Ba/Sr atomic ratio, the emission band of Eu2+ red-shifted and the FWHM enlarged. The application of NIR phosphor-converted LEDs was demonstrated, indicating their potential in night-vision technology.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Qing Guo, Shu-Guang Xia, Zhi-Kun Xin, Yang Wang, Fei Liang, Xiao-Lei Nan, Zhe-Shuai Lin, Xu-Bing Li, Chen-Ho Tung, Li-Zhu Wu
Summary: Surface vacancies in II-VI semiconductors, specifically CdS nanorods, have been identified as active sites for photocatalytic CO2 reduction. By intentionally introducing S vacancies through a post-treatment, it was confirmed that CdS nanorods with more surface S vacancies exhibit enhanced CO generation rates, attributed to changes in electronic structure.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Binbin Su, Kai Han, Zhiguo Xia
Summary: This study reports the use of Mn2+-doped all-inorganic metal halide as an X-ray imaging scintillator, which exhibits high photoluminescence quantum yield, large Stokes shift, and strong X-ray absorption capability. The scintillation screen fabricated from this material shows good X-ray scintillation performance and stability, making it a promising candidate for high-energy radiation detection.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Zhiyu Yang, Tristan de Boer, Patrick M. Braun, Binbin Su, Qinyuan Zhang, Alexander Moewes, Zhiguo Xia
Summary: This study explores Eu2+-activated oxide-based double perovskites as red emitters with thermally stable photoluminescence for laser-driven lighting applications. The Sr3TaO5.5:Eu2+ ceramics demonstrate a red emission band and a constructed laser-driven white light wheel achieves a record luminous flux and excellent color rendering index.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xinquan Zhou, Kai Han, Yexin Wang, Jiance Jin, Shangda Jiang, Qinyuan Zhang, Zhiguo Xia
Summary: A new generation X-ray storage phosphor material, CsCdCl3:Mn2+, Zr4+, was designed and synthesized with improved performance by manipulating Mn2+ site occupation and heterovalent substitution. This material exhibited zero-thermal-quenching radioluminescence and anti-TQ X-ray-activated persistent luminescence, achieving high storage capacities and high-resolution X-ray imaging.
ADVANCED MATERIALS
(2023)
Article
Optics
Yuanyuan Li, Puxian Xiong, Bibo Lou, Hendrik C. Swart, Chonggeng Ma, Zhiguo Xia
Summary: Broadband NIR emission is achieved in Bi3+ activated perovskite oxides MZrO3 (M = Ba, Sr), and the luminescence mechanism is revealed through experimental and first-principles studies. The valence state of Bi3+ ions is confirmed to be trivalent, and the possibility of NIR emission from lower state bismuth is excluded. The selective occupancy of Bi3+ in different sites enables the emission discrepancy, where Bi3+ on M2+ sites accounts for visible emission while Bi3+ on Zr4+ sites shows NIR emission. The existence of Ba2+ vacancy has a significant influence on the emission spectra of Bi3+ visible emission.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Physical
Yu Chen, Zhiyu Yang, Jiance Jin, Jianwei Qiao, Yuzhen Wang, Maxim S. Molokeev, Hendrik C. Swart, Zhiguo Xia
Summary: Exploring oxide-based red-emitting phosphors is important for improving the color rendering index and reducing the correlated color temperature of white-light-emitting diode (LED) lighting sources. This study synthesized a red-emitting Sr2LaGaO5:Eu2+ oxide phosphor and successfully achieved tunable emission by substituting Sr with Ba atoms. By mixing different colored phosphors, a white LED device with high color rendering index and low color-dependent temperature was fabricated.
CHEMISTRY OF MATERIALS
(2023)
Article
Optics
Taoze Wang, Yuzhen Wang, Weibin Chen, Zhiguo Xia
Summary: In this study, Na2SrGe6O14:Cr3+ (NSGO:Cr) glass ceramics (GC) with ultra-broad emission band and high EQE were fabricated. Yb3+ co-doping significantly enhanced Cr3+ -> Yb3+ energy transfer, leading to improved thermal stability. Furthermore, the encapsulant-free NIR GC-converted LED exhibited high output power and photoelectric conversion efficiency.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Yuzhen Wang, Gaochao Liu, Zhiguo Xia
Summary: This study successfully achieved near-infrared (NIR) II emission in a certain calcium gallium silicate crystal by designing and verifying the occupation of Cr4+ ions. The phosphor exhibited broadband NIR-II emission under red light excitation, with good temperature response and relative sensitivity.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Weibin Chen, Yuzhen Wang, Jian Xu, Xinrong Chen, Ole B. Jensen, Qinyuan Zhang, Zhiguo Xia
Summary: This study develops a hot-pressing synthesis route to obtain high-performance red-emitting cordierite ceramic, which demonstrates exceptional saturation threshold and luminous exitance. The innovation of solid-state synthesis from glass to bulk converters meets the demanding requirements of advanced warm white laser lighting.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Yakun Hu, Jiance Jin, Kai Han, Zhiguo Xia
Summary: Doping Cu+ in Rb2AgBr3 leads to cold-white light emission at room temperature without changing the spectral profiles. The Cu+ incorporation significantly enhances the photoluminescence quantum efficiency and scintillation performance. By mixing Cu+ doped Rb2AgBr3 scintillators with polydimethylsiloxane, a large scintillator film with high spatial resolution for X-ray imaging is achieved.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Bohan Li, Jiance Jin, Meijuan Yin, Kai Han, Yuchi Zhang, Xinlei Zhang, Anran Zhang, Zhiguo Xia, Yan Xu
Summary: High-performance glass-ceramic (G-C) scintillators with improved light yields and lower detection limits are developed from 0D hybrid metal halide (HMH) glass through in situ recrystallization. This opens up possibilities for phase transformation engineering in 0D HMHs and enables their application in large-area scintillation screens.
Article
Chemistry, Multidisciplinary
Meijuan Yin, Bohan Li, Zishuo Yi, Yuchi Zhang, Zhiguo Xia, Yan Xu
Summary: This study reports four zero-dimensional Sb-based halide glasses that exhibit reversible phase transition and modulated luminescence properties. The findings offer potential applications in information encryption and anti-counterfeiting.
CHEMICAL COMMUNICATIONS
(2023)
