Inorganic Chemistry Frontiers
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2021
·Vol. 9
·期 3
·494-500
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IF 6.569
Yaxin Xu,Jiarui Hu,Xingfu Xiao,Huanfeng He,Guoliang Tong,Junnian Chen,Yunbin He
Bismuth halide hybrid perovskites have aroused intense interest in optoelectronic fields. However, developing novel bismuth halide hybrid perovskites to balance the hydrophobicity and electron transport ability is still challenging. Besides, the conventional temperature-lowering crystallization method usually causes high supersaturation and facilitates the formation of impurity phase and defect structures. Herein, we reported the synthesis of bulk zero-dimensional (0D) guanidinium bismuth iodide ((Gua)3Bi2I9) single crystals via an antisolvent-assisted evaporation crystallization method at room temperature. The as-grown (Gua)3Bi2I9 single crystals have sizes of up to 5 × 5 × 0.6 mm3. Besides, they have shown to have distinct semiconductor properties, such as a direct bandgap of 2.08 eV, low density of defects and traps of 3.35 × 1010 cm−3 and obvious photoconductivity. Moreover, (Gua)3Bi2I9 exhibits a large bulk resistivity of 3.94 × 1011 Ω cm and strong X-ray attenuation coefficient, which satisfies the distinct attributes for X-ray detection. As a consequence, the assembled vertical Au/(Gua)3Bi2I9 single crystal/Au X-ray photoconductor achieves a sensitivity of 18.23 μC Gyair−1 cm−2 at a bias voltage of 500 V. This study provides a new horizon for the design and synthesis of bismuth halide perovskites toward non-toxic X-ray detectors.
研究领域:
材料科学
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光电领域
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医学检测
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2021
·
IF 3.498
You-Yu Wang,Li Song,Ze-Qi Dai,Jun-Chen Xu,Jian He,Wei Liu,Hang-Yan Shen,Wen-Xiang Chai
Three new perovskite-like iodobismuthate hybrids with two butylpyridinium cations, namely (BPY) 3 (Bi 2 I 9 ) ( 1 ), (BPY) 5 (Bi 2 I 11 ) ( 2 ) and (BMPY) 3 (Bi 2 I 9 ) ( 3 ) (BPY = 1-butylpyridinium, BMPY = 1-butyl-4-methylpyridinium), were synthesized by reacting of BiI 3 and butylpyridinium. Single-crystal X-ray diffraction analysis revealed that these three hybrids exhibit two types of di-nuclear cluster structures, face-sharing Bi 2 I 9 3− cluster for 1 and 3 , and vertex-sharing Bi 2 I 11 5− cluster for 2 . Their optical band gaps were determined as 2.06 eV( 1 ), 2.01 eV( 2 ), 1.86 eV( 3 ), respectively. DFT calculation reveals that their valence band tops and conduction band bottoms are composed of the states of iodine and pyridinium cations, respectively. Therefore these materials were classified as charge-transfer salts. Compared with similar iodobismuthates, their band gaps are significantly reduced. In addition, it is found that the band gaps should be affected by supramolecular interaction between cations in 2 and also by the conformational multiplicity of cations in structure 3 . Photocurrent response test showed that these charge-transfer salts have rapid and consistent photocurrent response. This result indicated their potential applications as a photocatalyst or a photovoltaic absorber.
研究领域:
材料科学
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化学
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理论计算
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Nanomaterials
·
2022
·Vol. 12
·期 18
·3121
·
IF 5.719
Zhangwei He,Runnan Yu,Wanrong Song,Yongshuai Gong,Hui Li,Zhan’ao Tan
Bismuth triiodide (BiI3) is a particularly promising absorber material for inorganic thin-film solar cells due to its merits of nontoxicity and low cost. However, one key factor that limits the efficiency of BiI3solar cells is the film morphology, which is strongly correlated with the trap states of the BiI3film. Herein, we report a coordination engineering strategy by using Lewis base dimethyl sulfoxide (DMSO) to induce the formation of a stable BiI3(DMSO)2complex for controlling the morphology of BiI3films. Density functional theory calculations further provide a theoretical framework for understanding the interaction of the BiI3(DMSO)2complex with BiI3. The obtained BiI3(DMSO)2complex could assist the fabrication of highly uniform and pinhole-free films with preferred crystallographic orientation. This high-quality film enables reduced trap densities, a suppressed charge recombination, and improved carrier mobility. In addition, the use of copper(I) thiocyanate (CuSCN) as a hole transport layer improves the charge transport, enabling the realization of solar cells with a record power conversion efficiency of 1.80% and a champion fill factor of 51.5%. Our work deepens the insights into controlling the morphology of BiI3thin films through the coordination engineering strategy and paves the way toward further improving the photovoltaic performances of BiI3solar cells.
研究领域:
材料科学
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光伏技术
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理论计算
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高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Qi Deng,Fangzhong Liu,Xiongwei Wu,Changzhu Li,Weibin Zhou,Bei Long
The development of aqueous battery with dual mechanisms is now arousing more and more interest. The dual mechanisms of Zn 2+ (de)intercalation and I − /I 2 redox bring unexpected effects. Herein, differing from previous studies using ZnI 2 additive, this work designs an aqueous BiI 3 -Zn battery with self-supplied I − . Ex situ tests reveal the conversion of BiI 3 into Bi (discharge) and BiOI (charge) at the 1st cycle and the dissolved I − in electrolyte. The active I − species enhances the specific capacity and discharge medium voltage of electrode as well as improves the generation of Zn dendrite and by-product. Furthermore, the porous hard carbon is introduced to enhance the electronic/ionic conductivity and adsorb iodine species, proven by experimental and theoretical studies. Accordingly, the well-designed BiI 3 -Zn battery delivers a high reversible capacity of 182 mA h g −1 at 0.2 A g −1 , an excellent rate capability with 88 mA h g −1 at 10 A g −1 , and an impressive cyclability with 63% capacity retention over 20 K cycles at 10 A g −1 . An excellent electrochemical performance is obtained even at a high mass loading of 6 mg cm −2 . Moreover, a flexible quasi-solid-state BiI 3 -Zn battery exhibits satisfactory battery performances. This work provides a new idea for designing high-performance aqueous battery with dual mechanisms.
研究领域:
电化学
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能源材料
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储能技术
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无机化学
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纳米材料
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高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
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2021
·Vol. 218
·期 11
·2000740
·
IF 1.981
Hao Wu,Xianli Huang,Jun Lv,Lei Sheng,Bin Gao,Cheng Jiang,Tao Wang,Jianping He
Bismuth tri-iodide (BiI 3 ), a promising lead-free photoelectric semiconductor material, is suitable for photovoltaic applications. Herein, the effect of halogen doping with bromine (Br) and chlorine (Cl) compounds on the morphology and photovoltaic performances of BiI 3 thin films is investigated. BiI 3− x X x films doped with halogens are prepared by vacuum thermal evaporation. Scanning electron microscope (SEM) shows that with the increase in doping ratio, the morphology of the thin film changes significantly, which is conducive to the contact with the cavity conduction layer. The bandgap increases from ≈1.75 to 1.78 eV (BiI 2.91 Cl 0.09 ) and 2.06 eV (BiI 2.91 Br 0.09 ) after doping. X-ray photoelectron spectroscopy (XPS) shows that the band position of the two doped films increases, which is more conducive to the realization of band matching. The films with higher properties are obtained by doping halogens, and the maximum (BiI 2.91 X 0.09 ) photocurrent is twice of the minimum (BiI 2.97 X 0.03 ). The maximum photocurrent obtained by photocurrent I – T test is 0.043 Ma cm −2 (BiI 2.91 Cl 0.09 ) and 0.047 mA cm −2 (BiI 2.91 Br 0.09 ).
研究领域:
材料科学
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光伏技术
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半导体物理
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RSC Advances
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2017
·Vol. 7
·期 56
·35549-35557
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IF 3.108
Mengqin Kong,Hang Hu,Li Wan,Miaomiao Chen,Yisheng Gan,Jia Wang,Fengxiang Chen,Binghai Dong,Dominik Eder,Shimin Wang
Methylammonium iodide bismuthate ((CH3NH3)3Bi2I9) (MBI) perovskite was introduced as a new lead-free and air-stable absorber for hole conductor-free perovskite solar cells. The two-step soaking-assisted sequential solution (2-S) method was adopted to fabricate MBI films for the first time. We compared the formation processes and final morphologies of the MBI films fabricated using the 1-S and 2-S methods on planar and mesoporous TiO2 layers, respectively. We also investigated the effects of the morphologies of MBI films and device architectural design on device performance. Results showed that the MBI films fabricated using the 2-S method achieved a superior coverage both on the compact TiO2 and mesoporous TiO2 layers. The mesoporous structure devices presented higher power conversion efficiencies than the planar structure devices. In addition, all devices exhibited excellent thermal and long-term stabilities. The presented architectural design and solution-processable approach could inspire further research and practical applications on lead-free organic–inorganic hybrid perovskite solar cells.
研究领域:
材料科学
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可再生能源
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光伏技术
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2019
·
IF 6.393
Yan Chen,Yunlei Zhou,Huanshun Yin,Fei Li,Hui Li,Runze Guo,Yihao Han,Shiyun Ai
Histone acetylation is a very important post-transcriptional modification, which is catalyzed by histone acetyltransferase with acetyl group donor of acetyl coenzyme A (Ac-CoA). Abnormal histone acetylation is associated with many diseases, so it is important to develop a sensitive and efficient method for detecting histone acetyltransferase (HAT). In this paper, a simple and sensitive photoelectrochemical biosensor was established for indirect detection of HAT using the acetylation reaction by-product of coenzyme A (CoA) as target molecule. To construct the biosensor, BiOI nanoflower was employed as photoactive material, Fe 3 O 4 -NH 2 and 3-maleimidopropionic acid were used as “bridge” reagents for immobilizing CoA, and ZnO quantum dots were adopted as photocurrent inhibitor. Under optimal experimental conditions, the photocurrent decreased with changing HAT concentration from 0.01 to 500 nM. The linear relationship between the photocurrent and the logarithm value of HAT concentration can be constructed with this concentration range and the detection limit was 3 pM (S/N = 3). The sensor has excellent detection specificity, good stability and reproducibility. Based on the current situation of serious antibiotic contamination, the effect of antibiotics on HAT activity was investigated using this photoelectrochemical biosensor.
研究领域:
生物化学
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分析化学
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分子生物学
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医学诊断
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jiayi Shen,Long Li,Jinxin Bian,Lu Chen,Ninghao Zheng,Xiaoxun Wu,Fan Wu
Surface functionalization with the dye Z907 reconfigures the electronic landscape of lead-free Cs 3 Bi 2 I 9 perovskite photodetectors and triples zero-bias performance. The dye modification layer leaves morphology intact ( R a ≈12 nm) yet passivates traps, as SCLC confirms. Kelvin-probe mapping discloses a 300 mV Fermi-level downshift that aligns the valence band of Cs 3 Bi 2 I 9 with the highest ccupied molecular orbital of P3HT, enabling efficient hole extraction. The Cs 3 Bi 2 I 9 /Z907/P3HT stack delivers a surface photovoltage of 325 mV and cuts rise/decay constants from 496/313–285/286 ms. Transient surface photovoltage traces reveal a polarity reversal, seven-fold surface photovoltage amplification, and a lengthened tail, evidencing redirected carrier flow and suppressed trap-assisted back-transfer. Dynamic intensity-modulated photocurrent spectra display an order-of-magnitude reduction in charge-transfer time and a larger high-frequency phase lead, confirming faster interfacial hole extraction and lower recombination resistance. These dynamics yield a bias-free responsivity and detectivity 2–3 times higher than in bare films, while the device cleanly encodes 8-bit ASCII via binary light pulses, illustrating the promise of molecular interface engineering for energy-autonomous visible-light communication.
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高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2025
·Vol. 122
·期 41
·e2415664122
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IF 9.1
Zezhu Zeng,Zheyong Fan,Michele Simoncelli,Chen Chen,Ting Liang,Yue Chen,Geoff Thornton,Bingqing Cheng
The glassy thermal conductivities observed in crystalline inorganic perovskites such as Cs3Bi2I6Cl3 are perplexing and lacking theoretical explanations. Here, we first experimentally measure its thermal transport behavior from 20 to 300 K, after synthesizing Cs3Bi2I6Cl3 single crystals. Using path-integral molecular dynamics simulations driven by machine learning potentials, we reveal that Cs3Bi2I6Cl3 has large lattice distortions at low temperatures, which may be related to the large atomic size mismatch. Employing the Wigner formulation of thermal transport, we reproduce the experimental thermal conductivities based on lattice-distorted structures. This study thus provides a framework for predicting and understanding glassy thermal transport in materials with strong lattice disorder.
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PubMed
高影响因子
Photonics
·
2025
·Vol. 12
·期 7
·709
·
IF 1.9
Yun Wei,Peng Wan,Lijian Li,Tao He,Wanyu Ma,Tong Xu,Bingwang Yang,Shulin Sha,Caixia Kan,Mingming Jiang
Topological insulators (TIs) hold considerable promise for the advancement of optoelectronic technologies, including spectroscopy, imaging, and communication, owing to their remarkable optical and electrical characteristics. This study proposes a novel combination of Bi2Se3TIs and ReSe2for self-powered broadband photodetectors with high sensitivity and fast response time. The Bi2Se3/ReSe2heterojunction photodetector achieves broadband response spectra ranging for 375 nm to 1μm. It demonstrates a significant responsivity of 64 mA/W at a wavelength of 600 nm (1 mW/cm2), exhibits a rapid response speed of 345μs rise/336μs fall time, and has a 3 dB bandwidth of 1.4 kHz under zero-bias conditions. The high performance can be attributed to the suitable energy band structure of Bi2Se3/ReSe2and high carrier mobility in surface states of Bi2Se3. Excitingly, self-powered TIs photodetectors allow for high-quality signal transmission. The TIs employed in photodetectors can stimulate the production of new optoelectronic features, but they could also be used for highly integrated photonic circuits in the future.
研究领域:
光电子学
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材料科学
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纳米技术
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光子学
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半导体器件
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.7
Chun Sun,Jiazhi Cui,Zhengtao Qiu,Jiabao Bai,Chao Fan,Dan Huang,Guohua Jia
Perovskites have attracted considerable interest as potential photocatalysts for sustainable hydrogen generation. Nonetheless, their intrinsic instability in aqueous media significantly constrains their practical deployment in photocatalytic hydrogen evolution. To address this challenge, we propose a versatile strategy for stabilizing Cs 3 Bi 2 Br 9 (CBB) perovskite photocatalysts through combining zwitterionic ligand encapsulation with Sn 4+ doping. The zwitterionic ligand, synthesized by reacting 4-bromobutyric acid (BBA) with oleylamine (OLA), was employed to passivate the perovskite surface by anchoring to both Bi 3+ and Br − sites, effectively mitigating surface defects. Notably, Sn 4+ doping is essential for aqueous stability, as the incorporation of Sn 4+ not only enhances the intrinsic stability of CBB but also reinforces the binding affinity of surface ligands. As a result, the Sn 4+ -doped CBB (CBBS x ) with ligand encapsulation demonstrates remarkable stability, retaining its structural integrity in water for over six months and withstanding more than three cycles of photocatalytic testing. Importantly, this strategy demonstrates considerable generality, as it can be readily extended to the synthesis of other halide perovskites. Specifically, the MoS x -loaded Sn 4+ :Cs 3 Bi 2 Br x I 9-x (MoS x /CBBIS 0.2 ) composite achieves a remarkable hydrogen evolution rate of 18.2 mmol h −1 g −1 , which represents the highest performance reported to date among Bi-based perovskite photocatalysts.
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PubMed
高影响因子
Nature Communications
·
2026
·
IF 18.1
Bai Qingyu,Yang Long,Chen Zhiwei,Li Changyuan,Cheng Ruihuan,Shu Mingfang,Zhu Jinfeng,Liu Ziyue,Yang Yuyan,Yang Jiong,Ren Jie,Voneshen David,Asai Shinichiro,Masuda Takatsugu,Sarker Suchismita,Zhang Yifei,Wu Jiangbin,Tan Ping-Heng,Chen Yue,Ma Jie,Pei Yanzhong
Vortical motion naturally occurs on various scales, from galaxies to skyrmions, influencing the dynamics of mass and information transport. Yet its impact on lattice dynamics in solids is rarely explored so far, primarily owing to the strong interatomic bonds in real materials that inhibit the actual transport of their constituent species. Here we investigate the effect of vortical modes of polarized phonons on the heat insulation of solid materials using synchrotron X-ray diffuse scattering and inelastic neutron scattering along with ab initio molecular dynamics simulations. We demonstrate this vortical vibration as well as its effect on thermal insulation in CsAg 2 I 3 , where the anisotropically bonded iodine atoms form the low-lying transverse optical phonons for enhancing scattering phase space. Moreover, the vortical modes, mainly arising from the chiral symmetric operations acting on the iodine sites, induce two-dimensional short-range-ordering of atomic clusters, lead to a substantially increased phonon scattering centers with a diameter on the order of ~2 primitive cells. This eventually results in extraordinary heat insulation in the single-crystalline CsAg 2 I 3 , exhibiting a thermal conductivity as low as 0.08 W/m-K at room temperature. This strategy establishes a material design paradigm for heat insulation and unveils an unexplored avenue for phonon transport manipulation.
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