Energies
·
2025
·Vol. 18
·期 9
·2162
·
IF 3.2
Yufan Jiang,Dongdong Deng,Jingjing Dong
All-inorganic CsPbX3perovskites have significant potential for applications in the photovoltaic field. However, during their preparation, the slow evaporation rate of the precursor solution limits the extent of solution supersaturation, leading to porous perovskite films that substantially impair device performance. Anti-solvent engineering, which introduces a secondary solvent to modulate the crystallization process, is a well established technique in perovskite photovoltaic research. This study systematically examines the effects of four different anti-solvents on perovskite films and corresponding devices. It also investigates the optimal dipping-time of (trifluoromethyl)benzene as an anti-solvent, as well as the impact of varying amounts of anti-solvent additive perfluorinated acid. The optimized devices achieved a maximum power conversion efficiency of 12.68%.
研究领域:
材料科学
·
能源科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Wenbin Shi,Ping Yang,Xiao Zhang
Low photoluminescence quantum yields (PLQYs) and poor stability limited the application of violet-emitting CsPbCl 3 nanocrystals (NCs). In this paper, highly stable and bright CsPbCl 3 NCs were studied by combining Sr doping at Pb sites with surface passivation using n-octylphosphonic acid (OPA). A novel hot-injection route was developed by employing acetate precursors and chlorotrimethylsilane. Comprehensive characterization revealed that Sr 2+ possessed similar ionic radius with Pb 2+ to effectively reduce lattice defects and enlarge the band gap, thereby inducing a blue-shifted PL peak. Simultaneously, the OPA ligand, leveraging the strong coordination ability of its phosphonic group, binds firmly to surface metal ions, effectively passivating surface defects and forming a hydrophobic barrier. Sr:CsPbCl 3 NCs created using optimized conditions exhibit a PL peak of 405 nm with a remarkable PLQY of 90.7%. The effect of Sr doping on the fluorescence decay kinetics of Sr:CsPbX 3 NCs was discussed. Furthermore, these NCs demonstrate outstanding stability under ambient atmospheric conditions, continuous UV light irradiation, and in polar solvents. This synergistic strategy, integrating internal lattice reinforcement and external surface shielding, was successfully extended to Sr:CsPbBr 3 and Sr:CsPbI 3 NCs, demonstrating its general applicability. Finally, high-quality red, green, and violet-emitting films were fabricated, highlighting the great potential for display applications.
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高影响因子
Chemical Science
·
2023
·Vol. 14
·期 33
·8914-8923
·
IF 8.4
Keqiang Chen,Zixin Gu,Zhiqing Wang,Mengyu Guan,Xiu Tan,Wanqing Xu,Xinyu Ji,Weiqi Lu,Yueli Liu,Guogang Li
Recently, the polarization effect has been receiving tremendous attention, as it can result in improved stability and charge transfer efficiency of metal-halide perovskites (MHPs). However, realizing the polarization effect on CsPbX3 NCs still remains a challenge. Here, metal ions with small radii (such as Mg2+, Li+, Ni2+, etc.) are introduced on the surface of CsPbX3 NCs, which facilitate the arising of electric dipole and surface polarization. The surface polarization effect promotes redistribution of the surface electron density, leading to reinforced surface ligand bonding, reduced surface defects, near unity photoluminescence quantum yields (PLQYs), and enhanced stability. Moreover, further introduction of hydroiodic acid results in the in situ formation of tert-butyl iodide (TBI), which facilitates the successful synthesis of pure iodine-based CsPbI3 NCs with high PLQY (95.3%) and stability under ambient conditions. The results of this work provide sufficient evidence to exhibit the crucial role of the surface polarization effect, which promotes the synthesis of high-quality MHPs and their applications in the fields of optoelectronic devices.
研究领域:
材料科学
·
光学
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DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Wenya Chen,Qiao Huang,Qingyun He,Shun Cheng,Xiaojuan Liang,Zhaoping Chen,Weidong Xiang
Nowadays, an all-inorganic metal halide perovskite (CsPbX3, X = Cl, Br, and I) has shown excellent prospects in liquid crystal display (LCD) backlight device applications. However, in order to better meet the market’s development, the stability of CsPbX3 still remains an urgent problem to be solved. Herein, a heat-water cyclic process of CsPbBrI2 glass powder (RGP) designed to improve stability is proposed. Excitingly, the treated RGP shows better optical properties and heat resistance. Moreover, RGP@PS was prepared with high blue light, water, and heat stabilities. It is particularly noteworthy that RGP6@PS was continuously exposed for 268 h at 60 °C and 90% relative humidity in the blue light (447 nm, 880 W/m2) environment with no decrease in brightness. It illustrates that the CsPbX3 films have made an important breakthrough in stabilities. The LCD device based on RGP@CsPbBr3@PS was designed with a wider color gamut (126%) compared with NTSC 1953. This study explores a new strategy to improve the stability of CsPbX3 thin films for LCD light conversion films.
研究领域:
材料科学
·
显示技术
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Shi Ye,Jia-Yi Sun,Yu-Hong Han,Ya-Yun Zhou,Qin-Yuan Zhang
CsPbX3 (X = Cl, Br, I) perovskite quantum dots (QDs) have emerged as competitive candidate luminescent materials in the photoelectric fields due to their superior luminescence properties. However, the major drawback such as poor resistance to temperature, moisture, and irradiation of light, especially for the red QDs with I–, hinders their practical applications. Herein, we synthesized Mn2+-doped CsPbCl3 embedded in the cage of zeolite-Y as a new orange-red phosphor for the white light-emitting diode (WLED). The composites have significantly improved resistance to both elevated temperature and water over the bare Mn2+-doped QDs. The former exhibits little degradation whereas the latter shows apparent decline upon the irradiation of lights in the orange LED devices, which are fabricated by employing each material as a color-conversion phosphor coated on a 365 nm UV chip. A WLED is also achieved with a 365 nm UV chip coated with a CsPb(Cl0.5,Br0.5)3–Y blue phosphor and a CsPb0.75Mn0.25Cl3–Y orange phosphor. The device possesses a Commission Internationale de l’Éclairage coordinate of (0.34, 0.36), a correlated color temperature of 5336 K and a color rendering index of 81.
研究领域:
材料科学
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光电领域
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产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 47
·20592-20599
·
IF 3.288
Yuhang Sheng,Aiqing Zhao,Songyan Yuan,Cihui Liu,Xiaowei Zhang,Yunsong Di,Zhixing Gan
Anion exchange reactions in lead halide perovskites provide post-treatment methods to functionalize and modulate their photoelectric properties. However, the mechanism of anion exchange reactions is still fiercely debated. Herein, by investigating time-dependent in situ PL spectra after mixing CsPbBr3 and CsPb(Br0.09/I0.91)3 perovskite nanocrystals (PNCs), the anion exchange process is divided into three stages, i.e. photon reabsorption process, initial anion exchange, and adequate anion exchange. This model is broadly applicable to different situations, ignoring the mixing order or molar ratios between Br and I. This work provides a dynamic model to describe the anion exchange of CsPbX3 PNCs, which will not only add fundamental knowledge to the stability of PNCs, but also guide the post-treatment of PNCs.
研究领域:
材料科学
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纳米技术
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光电子学
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DOI
高影响因子
ACS Applied Electronic Materials
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2022
·
IF 4.494
Jiakun An,Gaoyu Chen,Xia Zhu,Xin Lv,Jianchun Bao,Xiangxing Xu
All-inorganic perovskite CsPbX3 (X = Cl, Br, and I) quantum dots (QDs) are emerging as attractive materials for photodetectors due to their prominent positive photoresponse. In this work, ambipolar photodetectors were constructed based on heterojunctions of CsPbX3 QDs and ZnO nanocrystals (NCs). The transition between the positive photoconductivity (PPC) and negative photoconductivity (NPC) was successfully controlled not only by the drain-source voltage (VDS) but also by the excitation wavelength and CsPbX3 crystal size. A high responsivity (R), on–off ratio (η), and detectivity (D*) were achieved for NPC (R = 1046 mA/W, η = 281, and D* = 1.65 × 1011 Jones), with PPC (R = 146 mA/W, η = 64, and D* = 1.54 × 1011 Jones) simultaneously revealed in the same device. A general mechanism combining the type-II heterojunction, the component and size-related band structure, and most critically the in-band trap states of the perovskites was established for understanding the unique ambipolar property. It exhibits application potential in developing functional photodetectors, memristors, and optical logic devices.
研究领域:
材料科学
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光电子学
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DOI
高影响因子
Advanced Energy Materials
·
2018
·Vol. 8
·期 23
·1800758
·
IF 21.875
Haixia Rao,Senyun Ye,Feidan Gu,Ziran Zhao,Zhiwei Liu,Zuqiang Bian,Chunhui Huang
All-inorganic cesium lead halide (CsPbX 3 ) perovskites have emerged as promising photovoltaic materials owing to their superior thermal stability compared to traditional organic–inorganic hybrid counterparts. However, the CsPbX 3 perovskites generally need to be prepared at high-temperature, which restricts their application in multilayer or flexible solar cells. Herein, the formation of CsPbX 3 perovskites at room-temperature (RT) induced by dimethylsulphoxide (DMSO) coordination is reported. It is further found that a RT solvent (DMSO) annealing (RTSA) treatment is valid to control the perovskite crystallization dynamics, leading to uniform and void-free films, and consequently a maximum power conversion efficiency (PCE) of 6.4% in the device indium tin oxide (ITO)/NiO x /RT-CsPbI 2 Br/C 60 /Bathocuproine (BCP)/Ag, which is, as far as it is known, the first report of RT solution-processed CsPbX 3 -based perovskite solar cells (PSCs). Moreover, the efficiency can be boosted up to 10.4% by postannealing the RTSA-treated perovskite film at an optimal temperature of 120 °C. Profiting from the moderate temperature, flexible PSCs are also demonstrated with a maximum PCE of 7.3% for the first time. These results may stimulate further development of all-inorganic CsPbX 3 perovskites and their application in flexible electronics.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 25
·7905-7909
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IF 7.393
Heng Yang,Huihui Li,Rui Yuan,Junfeng Chen,Jingtai Zhao,Sheng Wang,Yufeng Liu,Qianli Li,Zhijun Zhang
Traditional inorganic scintillation crystals have a high stopping power to high-energy particles or rays; however, their wide applications are limited due to the fixed emission band. CsPbX3 (X = Cl, Br, I) perovskite nanocrystals (CsPbX3 NCs) have been proved to achieve full-color emission and effective X-ray detection, but failed to detect γ-rays effectively due to their weak absorption ability. Therefore, based on the advantages of the tunable spectra for CsPbX3 NCs and the high stopping ability of a BaF2 single crystal, a novel CsPbX3 NCs@BaF2 scintillation screen is developed ingeniously for realizing fast and full-color emission under high-energy ray excitation. The CsPbX3 NCs@BaF2 scintillation screen exhibits a tunable emission ranging from 435 to 648 nm under hard X-ray excitation. It is of note that the light yield of the CsPbBr3 NCs@BaF2 scintillation screen can reach up to 6300 photons per MeV and it shows a fast decay time component (∼11 ns) under γ-ray excitation. The purpose of this contribution is to provide a new solution for guiding the perovskite materials as potential scintillators for fast and full-color emission expanding the application of high-energy radiation detection.
研究领域:
材料科学
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物理学
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辐射检测
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高影响因子
Catalysts
·
2023
·Vol. 13
·期 7
·1041
·
IF 3.9
Xiaoqian Wang,Wanli Liu,Jiazhen He,Yuqing Li,Yong Liu
Compared with conventional semiconductors, halide perovskite nanocrystals (NCs) have a unique crystal structure and outstanding optoelectronic properties, offering wide potential for applications in optoelectronic devices such as solar cells, photodetectors, light-emitting diodes, lasers, and displays. Rational technological design is providing vital support for the development of perovskite optoelectronics. Herein, monodisperse all-inorganic halide perovskite nanocrystals with consistent morphology and cubic crystal phase were synthesized employing a modified one-pot hot injection method to independently modulate the stoichiometric ratios of three precursors involving cesium salt, lead source, and halide. In combination with an anion exchange reaction, mixing two kinds of perovskite NCs with different halogens enables a transition from violet emission to green and finally to red emission over the entire visible region. Additionally, optical and electrochemical tests suggested that the as-synthesized halide perovskite NCs are promising for photoelectric catalysis applications.Keywords:synthesis;CsPbX3;perovskite nanocrystals
研究领域:
材料科学
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纳米技术
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光电子学
·
催化
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DOI
高影响因子
Small Methods
·
2025
·
IF 9.1
Wenbin Shi,Xiao Zhang,Ping Yang
1D all-inorganic perovskite CsPbX 3 (X = Cl, Br, I) nanostructures exhibit significant potential in optoelectronics owing to their unique quantum confinement effects and anisotropic properties. Nevertheless, the controllable synthesis of these materials, particularly high-stability and high-luminance CsPbI 3 nanowires (NWs), remains challenging. In this paper, an efficient and controllable solvothermal route is developed to synthesize strongly quantum-confined CsPbX 3 1D nanostructures with uniform size and excellent crystallinity, including CsPbCl 3 and CsPbBr 3 nanorods (NRs) as well as CsPbI 3 NWs through precise regulation of reaction temperature, duration, and precursor ratios. The as-synthesized CsPbI 3 NWs exhibit precisely tunable photoluminescence (PL) within the range of 605–632 nm, high PL quantum yields (PLQYs) more than 90%, excellent PL performance, and significantly enhanced environmental and photostability. Furthermore, 1D CsPbCl 3 and CsPbBr 3 NRs are also successfully prepared, exhibiting PL peak wavelengths at 381 and 462 nm with PLQYs of 65.5% and 70.4%, respectively. Moreover, multicolor luminescent films are successfully fabricated through incorporating these nanomaterials, demonstrating their promising potential for applications in lighting and displays. This work introduces a general and reliable synthetic strategy for the precise fabrication of high-quality 1D perovskite nanomaterials with concurrently improved environmental resilience and operational durability.
研究领域:
纳米材料
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光电子学
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钙钛矿半导体
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量子限域
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光物理
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DOI
PubMed
高影响因子
Science China-Materials
·
2017
·Vol. 60
·期 4
·285-294
·
IF 3.956
Liao Jin-Feng,Li Wen-Guang,Rao Hua-Shang,Chen Bai-Xue,Wang Xu-Dong,Chen Hong-Yan,Kuang Dai-Bin
ABX 3 -type organic-inorganic hybrid halide perovskite materials have been recognized as promising candidates for optoelectronic applications. However, poor stability of organic-inorganic hybrid perovskite hinders their forward long-term utilization and hence an effective strategy is needed to replace the organic part with an inorganic cation. Herein, all inorganic CsPbI 3 nanowires with a diameter of 50–100 nm are synthesized on fluorine-doped tin oxide glass via a simple solution-dipping process, which are further transformed into CsPbBr 3 nanowires through a solution-phase halide exchange method. A phase change from non-perovskite to perovskite structure is observed during the ion substitution process of I − by Br − , which is elaborated by X-ray diffraction, absorption and photoluminescence spectra. We for the first time apply the as-formed CsPbI 3 and CsPbBr 3 nanowires into perovskite solar cells, yielding power conversion efficiency of 0.11% and 1.21%, respectively. The inorganic CsPbBr 3 nanowire solar cell shows impressive stability which still remains 99% of the initial power conversion efficiency even after 5500 h aging.
研究领域:
材料科学
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光伏技术
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纳米技术
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无机化学
·
光电子学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）