SOLAR ENERGY
·
2021
·
IF 5.742
Ying Tang,Rajarshi Roy,Zuhong Zhang,Yanchun Hu,Feng Yang,Chaochao Qin,Lulu Jiang,Hairui Liu
Adjusting the electron transport layer (ETL) is an effective method to improve the power conversion efficiency (PCE) of perovskite solar cells (PSCs) as well as suppress their hysteresis. In this study, we report that RbCl doping TiO 2 can enhance the crystallinity of perovskite and reduce hysteresis as well. As RbCl crystallite has a polyhedral structure and lattice parameters similar to those of the perovskite by calculation confirmed. According to the seed-mediated growth theory, seed-mediated perovskite formation results in a dense and uniform active layer with excellent crystallinity and low trap density, which can reduce the interfacial charge accumulation and carrier recombination. Consequently, the PSCs with the RbCl-doping ETL show remarkably enhanced performance (from 18.67% to 20.75%). Impressively, negligible hysteresis, high fill factor (FF, over 80%) can be observed for the perovskite with the modified ETL. This work is expected to provide a viable path to design a simple-processing ETL for efficient PSCs.
研究领域:
材料科学
·
光伏技术
·
能源研究
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xiaohui Wang,Xue Wang,Yali Wang,Quanguo Zhai,Yucheng Jiang,Shuni Li
Octahedral molecular sieve – 5 (OMS-5), a typical 2 × 4 tunnel manganese oxide, is considered as an adsorbent for rubidium ion (Rb + ) because of its specific tunnel structure. Also, manganese oxide-based nanomaterials are also widely used in supercapacitor energy storage and capacitor deionization electrodes due to their high specific capacitance. In this work, a series of protonated OMS-5 (H-OMS-5, H-Co-OMS-5, and H-Ni-OMS-5) nanobelts are synthesized and used as electrode materials for electrochemical enrichment of Rb + in aqueous solution. The specific capacity values for H-OMS-5, H-Co-OMS-5, and H-Ni-OMS-5 at 1 A·g −1 are of 159, 168, and 215 F·g −1 , respectively. Thanks to the unique protonated 2 × 4 tunnel structure, well regulating surface area, and excellent specific capacitance, the maximum Rb + adsorption capacities of H-OMS-5, H-Co-OMS-5, and H-Ni-OMS-5 can reach to 390.3, 405.7, and 481.7 mg·g −1 , respectively. These results indicate that the protonated 2 × 4 tunnel manganese dioxide nanobelts are of great potentials as faradaic electrode materials for selective rubidium ion enrichment applications.
研究领域:
材料科学
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环境科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jia Sun,Yinsheng Gu,Yingwei Lu,Juntao Hu,Tao Chen,Changfei Zhu,Paifeng Luo
Nowadays, the MA-FA mixed-cation perovskite solar cells (PSCs), demonstrating much higher stability than that of single-cation MAPbI 3 or FAPbI 3 , are still encountering a low-efficiency issue. The main reason is that there existing a lot of defects in SnO 2 electron transport layers (ETLs) and perovskite absorbers. Herein, we develop a synergistic strategy of Rubidium Chloride (RbCl) doping and 4- tert -butylbenzylammonium iodide (tBBAI) passivation to fabricate high-performance MA x FA 1-x PbI 3 mixed-cation PSCs. The alkali halide RbCl is first selected as a novel doping additive to regulate the film properties of SnO 2 and perovskites. Research shows that the negative Cl - ions can combine with uncoordinated Sn 4+ ions due to their strong bonding ability, which can passivate the oxygen-vacancy-related defects and enhance the charge transport of SnO 2 ETLs. Meanwhile, the doped Rb + and Cl - ions may diffuse into perovskite lattices to promote grain growth and reduce the defects of perovskites. Besides, we employ an organic halide salt tBBAI to passivate perovskites and suppress surface defects. Results of deep level transient spectroscopy (DLTS) indicate that SnO 2 and SnO 2 -RbCl based devices have deeper hole traps and large trap densities (Δ E = 0.92 eV, N T = 1.10 × 10 16 cm −3 ; ΔE = 0.93 eV, N T = 2.16 × 10 15 cm −3 ); while tBBAI-treated SnO 2 -RbCl-based devices own a shallower hole trap and a smaller trap density ( ΔE = 0.72 eV, N T = 2.44 × 10 13 cm −3 ); and the corresponding I Pb and I (MA/FA) antisite defeats are also identified. Therefore, our synergistic strategy is effectively able to reduce the defect density and suppress the non-radiative recombination. Consequently, the best-performance MA 0.85 FA 0.15 PbI 3 PSCs achieve an impressive power conversion efficiency (PCE) of 22.54% with a large open circuit voltage ( V oc ) of 1.16 V, which are by far the highest values of MA 0.85 FA 0.15 PbI 3 mixed-cation PSCs.
研究领域:
材料科学
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光伏技术
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Chuan Peng,Jing Zhao,Jin Huang,Yongge Yao,Xinlin Chen,Junfeng Zhang,Xiaolong Yu
Rubidium (Rb), a critical strategic metal with extensive applications in energy storage, electronics, and nuclear medicine, faces extraction challenges due to its low natural abundance and dispersed occurrence. To address the inefficiency and selectivity limitations of conventional extraction methods, this study synthesized a core-shell composite metal-organic framework (MOF) material, KCoFC@UiO-66, via a solvothermal coordination strategy. The material synergistically integrates the ion-exchange capability of potassium cobalt hexacyanoferrate (KCoFC) with the hierarchical porosity and structural stability of zirconium 1,4-dicarboxybenzene MOF (UiO-66). Structural characterization confirmed the core-shell architecture, where the KCoFC core facilitates selective Rb capture via ion exchange and cyano coordination, while the UiO-66 shell enhances Rb enrichment through electrostatic interactions and size-selective sieving. Adsorption kinetics followed a pseudo-second-order model, indicating chemisorption dominance, while isotherm studies aligned with Freundlich and Dubinin-Radushkevich models, revealing heterogeneous multilayer adsorption. The composite demonstrated remarkable selectivity for rubidium, achieving a recovery rate of 98.7 % from lithium tailing leachates, along with notable regeneration stability, retaining 86.2 % of its capacity after five cycles. This performance can be ascribed to the ability of UiO-66 to inhibit the aggregation of KCoFC and to the effects of pore confinement. This work establishes a multi-mechanistic adsorption paradigm combining ion exchange, electrostatic attraction, and pore confinement, offering a scalable solution for Rb recovery from complex matrices.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Xiaotian Ma,Shaohua Liu,Xifa Long,Yun Yang
A new mixed alkali metal and rare-earth metal fluoride, Rb 2 Sc 3 F 11 , was successfully synthesized using the high-temperature solution method. It is a rare example containing mixed ScF 7 and ScF 6 groups and crystallizes in the orthorhombic space group Imma (No. 74). Significantly, the optical characterization indicates that Rb 2 Sc 3 F 11 shows a short deep-ultraviolet (DUV) cutoff edge (<200 nm) due to the introduction of the rare-earth scandium and the fluorine with the large electronegativity. It also possesses a moderate birefringence (0.037@532 nm). First-principles calculations were also implemented for a better understanding of the relationship between structure with properties of Rb 2 Sc 3 F 11 .
研究领域:
材料科学
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理论化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2024
·
IF 3.2
Jiahui Ni,Bingxue Sun,Peijun Liu,Guan-Ping Jin
Magnetic substrates are favorable for separating adsorption-saturated powder adsorbents from solutions. Here, a core-shell magnetic potassium nickel copper hexacyanoferrate composite (MKNiCuFC@ZIF-8) modified with zeolitic imidazolate frameworks was synthesized for selective extraction of rubidium (Rb) in solution. MKNiCuFC@ZIF-8 was analyzed in depth using N 2 adsorption-desorption, SEM, XRD , FT-IR, XPS, etc. Batch experiments were employed to assess the adsorption properties of MKNiCuFC@ZIF-8 for Rb + . The adsorption behavior based on the exchange behaviors of Rb + and K + conforms to the pseudo-second-order kinetic model . Meanwhile, the adsorption data are well fitted through the Langmuir isotherm model and reached a maximum adsorption amount of 1030.69 mg g −1 at 45 °C. Furthermore, MKNiCuFC@ZIF-8 could be regenerated with 90.3 % of absorbed Rb + being desorbed in 1 mol L −1 of KCl within 24 h.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2024
·
IF 3.7
Huanxi Xu,Peihua Lin,Pei-Jun Liu,Hai-Gang Liu,Hui-Bin Guo,Chao-Xiang Wu,Ming Fang,Xu Zhang,Guan-Ping Jin
A novel integrated film of sulfonated polysulfone/graphene/potassium copper ferricyanide (KCuFC/SPSG) was used for selectively extracting rubidium ion (Rb + ) from brine. To form KCuFC/SPSG, the precursor film of sulfonated polysulfone/graphene (SPSG) was synthesized by phase conversion process, which was alternately immersed in 0.1 mol·L –1 CuSO 4 /K 4 [Fe(CN) 6 ] by in-situ adsorption coupled co-precipitation method. Various data such as nuclear magnetic resonance spectrometer, Fourier transform infrared spectroscope, X-ray photoelectron spectroscope, X-ray diffraction, scanning electron microscope and energy dispersive spectroscopy all verified that abundant KCuFC were uniformly located on the film. The resulting KCuFC/SPSG was used in film separation system. As the solution was fed into the system, the Rb + could be selectively adsorption by KCuFC/SPSG. After the saturation adsorption, 0.5 mol·L –1 NH 4 Cl/HCl was fed into the film cell, Rb + could be quickly desorbed by ion-exchange between Rb + and NH 4 + in the lattice of KCuFC. The purpose of separating and recovering Rb + from the brine can be achieved after the repeated operation. The effects of pH, adsorption time and interferential ions on the adsorption capacity of Rb + were investigated by batch experiments. The adsorption behavior fits the pseudo-second order kinetic process, while KCuFC has a higher adsorption capacity (Langmuir maximum sorption 165.4 mg∙g –1 ). In addition, KCuFC/SPSG shows excellent selectivity for Rb + even in complex brine systems. KCuFC/SPSG could maintain 93.5% extraction efficiency after five adsorption/desorption cycles.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2018
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IF 4.484
Linyuan Lian,Feng Cheng,Yong Xia,Moyan Zheng,Jiangping Ke,Weizhuo Zhang,Jungang He,Huan Liu,Daoli Zhang,Jianbo Gao,Jiang Tang,Luying Li,Manlin Tan,Jianbing Zhang
RbBr nanocubes were transformed from solid to hollow nanostructure under e-beam irradiation while maintaining the size, exterior shape, and crystalline structure. The process of the morphological evolution was studied by in situ TEM characterization at atomic resolution. The transformation was attributed to combination of the radiolysis and surface ligand bonding (stabilization). The radiolysis occurred at the surface resulted in evaporation or sputtering of the constituent atoms at the unpassivated sites, leaving vacancies at the surface which facilitate the outward diffusion of atoms from inside. The atoms near the surface were stabilized by the bonding of the ligands and remained in the crystalline configuration, leading to the formation of hollow nanocubes.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 7
·2531-2539
·
IF 6.4
Ying Ding,Richeng Lin,Zhuogeng Lin,Wei Zheng
The difficulties in precise composition synthesis, large-scale growth, and environmental friendliness of halide perovskites and their derivatives, as well as the lack of research on their basic physical properties, hinder their application in the field of optoelectronics. Here, through a liquid-phase method, we have synthesized large-size (20 × 5 × 2 mm) and high-quality perovskite-type RbCu2Br3 crystals with a one-dimensional electronic structure for the first time. Interestingly, as temperature decreases, the light emitted by the RbCu2Br3 crystals shows a transition from blue light to dazzling orange light, and the crystals show double exciton radiative recombination of photoluminescence and radioluminescence at low temperatures. It is found that the crystal structure symmetry is broken due to the superposition of thermally-induced local deviations of the crystal field resulting in a structural transition from the Cmcm to Pnma phase with low symmetry. This work can help to enrich the categories of copper-based halides, and provide new perspectives for the research on the photophysical properties and applications of such materials.
研究领域:
材料科学
·
光学
·
晶体学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
W.Q. Zhang,T. Yamaguchi,C.H. Fang,K. Yoshida,Y.Q. Zhou,F.Y Zhu,S. Machida,T. Hattori,W. Li
An aqueous 3 m (=mol/kg) RbCl solution in D 2 O is measured at 298 K/0.1 MPa, 298 K/1 GPa, 523 K/1 GPa, and 523 K/4 GPa by neutron diffraction. The interference functions are analyzed by an empirical potential structure refinement (EPSR) modeling. The ion hydration and association and hydrogen-bonded water structure as a function of temperature and pressure are revealed in the pair correlation function, coordination number, triangular distribution, and spatial density function (3D structure). The results show that structure parameters are temperature and pressure-dependent. The second hydration layer of Rb + and Cl − becomes evident under elevated pressure and temperature conditions. The average oxygen coordination number of Rb + in the first hydration layer increases from 6.3 ± 1.7 at ambient pressure to 8.9 ± 2.3 at 4 GPa with decreasing coordination distance of 0.290 nm to 0.288 nm. The average oxygen coordination number of Cl − in the first hydration shell increases from 5.9 ± 1.5 at ambient pressure to 9.1 ± 2.1 at 4 GPa, and the corresponding coordination distance decreases from 0.322 nm to 0.314 nm with increasing pressure. The orientation of the water dipole in the first solvation shell of Rb + and a central water molecule is sensitive to pressure, but that in the first solvation shell of Cl - does not change very much regardless of the thermodynamic condition. The number of contact-ion pairs Rb + -Cl − decreases with elevated temperature and increases with elevated pressure. Water molecules are closely packed, and the tetrahedral hydrogen-bonded network of water molecules no longer exists in extreme conditions.
研究领域:
物理化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Guobiao Cen,Haigang Sheng,Zhengxuan Wang,Ling Yi,Hengchao Sun,Yipeng An,Chuanxi Zhao,Wenjie Mai
Bismuth-based double perovskite Cs 2 AgBiBr 6 shows promise as a photodetection material. However, its detection performance and application are limited by high-exciton binding energy and poor carrier mobility. In this study, we address these limitations by delicately designing a solution-based method for incorporating A-site Rubidium (Rb) substitution into Cs 2 AgBiBr 6 double perovskite films. The introduction of Rb resulted in a significant decrease in trap defect density and an improvement in film quality. The trap-filled limit voltage (V TFL ) of pure and Rb-doped CABB film is determined to be 1.71 V and 0.48 V, respectively. Subsequently, by introducing an ultrathin atomic-layer-deposited (ALD) TiO 2 films, the fabricated CABB photodetectors exhibit significantly improved photoresponse performance. The response speed and −3dB bandwidth are boosted from ∼93 ms to ∼350 μs and broadened from 1.4 kHz to 17 kHz, respectively. Density Functional Theory (DFT) calculations indicate Rb-substitution shortens the bond length and weaken exciton binding energy. Furthermore, we demonstrate a wireless near ultraviolet (UV) light communication system using CABB photodetectors as light receivers. Our findings provide an efficient approach to utilize A-site cation substitution as a tuning parameter for photodetection in high-exciton binding energy perovskite materials, thereby extending the potential applications of other functional perovskites .
研究领域:
材料科学
·
光子学
·
半导体物理
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2021
·
IF 9.676
Qian Chen,Changtao Peng,Lin Du,Tian Hou,Wenjing Yu,Dong Chen,Hui Shu,Dejun Huang,Xiangqing Zhou,Jinyang Zhang,Wenfeng Zhang,Haijin Li,Jiale Xie,Yuelong Huang
Electron transport layer (ETL) is very critical to the performance of perovskite solar cells (PSCs), and optimization work on ETL has received extensive attentions especially on tin oxide (SnO 2 ) since it is an excellent ETL material widely applied in high-efficiency PSCs. Thereinto, introducing mesoporous structure and surface modification are two important approaches which are commonly applied. Herein, based on the previous work in low-temperature fabrication process of mesoporous SnO 2 (m-SnO 2 ), we introduced a modification process with rubidium fluoride (RbF) to the m-SnO 2 ETL, and successfully achieved a synergy of the m-SnO 2 and RbF modification: not only the shortcoming of the m-SnO 2 in interfacial traps was overcome, but also the carrier collection efficiency was further improved. The PSCs based on the m-SnO 2 ETL with RbF modification demonstrated outstanding performances: a champion power conversion efficiency (PCE) of 22.72% and a stability performance of maintaining 90% of the initial PCE after 300 h of MPP tracking were obtained without surface passivation of perovskite film. Hence, utilizing the abovementioned synergy is a cost-effective and feasible strategy for fabricating high-efficiency and stable PSCs since the fabrication process of the m-SnO 2 ETL is a kind of low temperature process and RbF is cheap.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）