Advanced Electronic Materials
·
2024
·
IF 5.3
Huiyuan Cheng,Yifan Zheng,Yu Lou,Mengjie Sun,Guodong Zhang,Haoran Wang,Tom Wu,Yang Bai,Yuchuan Shao
Metal halide perovskite nanocrystals (PNCs) hold great promise for light-emitting diodes (LEDs) due to their high photoluminescence quantum yields (PLQY), tunable colors, and low-cost solution processability. However, their electroluminescence efficiencies are currently limited by the small size of the PNCs and the weak binding between ligands and PNCs. The small size makes PNCs sensitive to environmental factors due to their large specific surface area, leading to a loss of PLQY during post-treatment. Additionally, the weak binding between ligands and PNCs causes the ligands to detach during post-treatment, further reducing PLQY. To address these challenges, an in situ ligand-capped synthesis method is introduced for PNCs, replacing the aliphatic solvent octadecene (ODE) with trioctylphosphine (TOP). The presence of TOP increases the concentration of monomers, accelerating nucleation and crystal growth, enabling the production of cubic PNCs ranging from 8 nm to over 28 nm. Moreover, TOP acts as a ligand to resurface PNCs, enhancing their stability and maintaining high PLQY after post-treatment. As a result, by utilizing these larger PNCs, a high maximum external quantum efficiency (EQE) of 21.23% in LEDs is achieved. This method provides a significant advancement in the development of high-performance PNC-based LEDs.
研究领域:
材料科学
·
光电技术
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DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 33
·期 5
·055602
·
IF 3.874
Xinsu Zhang,Hao Lv,Weishuo Xing,Yanjun Li,Chong Geng,Shu Xu
Significant advance was realized on the economic synthesis of InP quantum dots (QDs) by using aminophosphines as phosphorus precursor. However, the low reaction activity and thermal degradation of aminophosphines bring severe difficulty for growth control of InP QDs. Here, we employed trioctylphosphine (TOP) as a surfactant to accelerate the growth of the InP QDs. The reaction mechanism study reveals that the TOP could form a reactive complex with indium halides that effectively accelerates the formation of InP monomer and reduces the demand for reaction temperature. On this basis, the effect of reaction temperature, precursors, and zinc halide additives on the growth of the TOP-InP QDs was explored. This strategy alleviates the difficulty in growth control of InP QDs and also benefits to the synthesis of luminescent InP/ZnS core–shell QDs within visible regime. A white-light emitting diode device was fabricated with the InP/ZnS QDs that demonstrates their application potential in light-emitting devices.
研究领域:
材料科学
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化学工程
·
纳米技术
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2026
·
IF 5.8
Xianyao Wu,Lanjing Wang,Guoshuai Zhang,Dawei Li,Lehong Li,Kejie Wang,Dawei Wang,Xueqian Liu,Jinxin Zhao,Yufeng Hu,Hong-shang Peng
Dual-functional TOP ligand simultaneously passivates Pb 2+ surface defects and creates a hydrophobic interface, enabling monodisperse CsPbBr 3 @SiO 2 QDs with a narrow size distribution and high PLQY. • TOP-assisted SiO 2 encapsulation significantly enhances colloidal stability, photostability, and reversible thermal emission behavior compared to TOP-free counterparts. • Solution-processable TOP-CsPbBr 3 @SiO 2 QDs enable high-resolution microfluidic patterning of uniform 10 µm line arrays (1270 ppi). All-inorganic CsPbBr 3 perovskite quantum dots (QDs) are promising green color-conversion materials for micro-LEDs and white LEDs, but their instability and aggregation during processing limit practical use. Herein, a trioctylphosphine (TOP)-assisted silica-coating strategy is developed to prepare monodisperse CsPbBr 3 @SiO 2 core–shell QDs in a one-pot process. TOP serves as a dual interfacial ligand: its phosphine group coordinates with undercoordinated Pb 2+ sites to passivate surface defects, while its octyl chains create a hydrophobic environment that moderates siloxane condensation and suppresses interparticle silica bridging. The optimized TOP-CsPbBr 3 @SiO 2 QDs exhibit good colloidal dispersibility, a PLQY of ∼87%, improved photostability, and reversible thermal emission behavior. Moreover, they can be processed into fluorescent inks for microfluidic patterning, achieving uniform 10 µm line arrays with 1270 ppi resolution, and integrated with KSF phosphors for WLED fabrication. Download: Download high-res image (224KB) Download: Download full-size image Highly monodispersed and luminescent CsPbBr 3 QDs were one-pot prepared for uniform and high-resolution patterning with 1270 ppi.
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高影响因子
Materials
·
2025
·Vol. 18
·期 7
·1518
·
IF 3.2
Chengqi Liu,Zahir Abdalla,Xiaoqian Wang,Manrui Liu,Yanhui Jiao,Zisheng Tang,Qi Zhang,Yong Liu
Metal halide perovskite nanorods hold great promise for optoelectronic applications. However, they tend to undergo phase transitions due to the instability of the crystal phase under environmental conditions, leading to a rapid decline in the fluorescence efficiency. Here, we report a method in which trioctylphosphine (TOP) directly serves as both the surface ligand and solvent to synthesize highly stable α-CsPbI3nanorods (NRs). This approach produces monodisperse α-phase NRs with controlled sizes (1 μm and 150 nm in length, and an aspect ratio of 10:1), as confirmed by high-resolution transmission electron microscopy (TEM) and X-ray diffraction. The optimized NRs exhibit a high photoluminescence quantum yield of around 80%, as well as excellent environmental stability; after 15 days of storage, the photoluminescence quantum yield (PLQY) retention is 90%. Transient absorption spectroscopy shows that the carrier lifetime is extended to 23.95 ns and 27.86 ns, attributed to the dual role of TOP in defect passivation and hydrolysis suppression. This work provides a scalable paradigm for stabilizing metastable perovskite nanostructures through rational ligand selection, paving the way for durable perovskite-based optoelectronics.
研究领域:
材料科学
·
光学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yan Zhao,Beili Pang,Shaojie Zheng,Xiangyu Kong,Mengyuan Zhao,Hongzhou Dong,Liyan Yu,Lifeng Dong
This study investigates the application of trioctylphosphine oxide (TOPO) and triphenylphosphine oxide (TPPO) as an additive to enhance the performance of all-inorganic CsPbBr3 perovskite solar cells (PSCs). The addition of TOPO and TPPO passivates surface defects, increases grain size, and reduces surface trap states, leading to better light absorption and accelerated carrier transport. These modifications lead to an optimized energy level distribution, resulting in a significant increase in power conversion efficiency from 5.14 to 9.21% with TOPO and from 5.14% to 7.28% with TPPO. Furthermore, the long alkyl chains in TOPO provide effective isolation from air and water, significantly enhancing device stability for over 2400 h without packaging. The findings demonstrate that oxygen phosphine additives with long alkane chains are more effective in improving PSCs than those with aromatic hydrocarbons, offering new insights for the use of passivators in perovskite solar cells.
研究领域:
材料科学
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光伏技术
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化学工程
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DOI
PubMed
高影响因子
HYDROMETALLURGY
·
2020
·
IF 3.338
Ronghao Liu,Yuqi Geng,Zhijian Tian,Ning Wang,Min Wang,Guanju Zhang,Yanzhao Yang
In this paper, trioctylphosphine oxide (TOPO) was combined with some environmental-friendly molecules to form hydrophobic deep eutectic solvents (HDESs) for platinum (Pt) extraction from secondary resources. Due to the formation of HDESs, the loss of TOPO content in the aqueous solution obviously decreased. Then, the extraction behaviors under different vibrating time, acidity and salinity (NaCl/NaBr) were investigated and discussed. Among all the constructed HDESs, the TOPO/1-butanol showed the best Pt(IV) extraction performance (98.9%) in 5.6 mmol·L −1 Pt(IV) solution. Ion-association mechanism in the extraction process was proposed through the analysis of UV–vis and FT-IR spectra. In addition, the HDESs exhibited excellent selectivity to Pt(IV) in the experiments of multi-metal selective extraction. The extracted Pt(IV) could be easily and completely stripped by adding 3 mL 0.5 mol·L −1 NaOH solution, and the extraction ability of recovered extractants remained constant after 4 cycles of extraction tests. Furthermore, by using RSM-CCD optimization, the operating concentration of acidity and salinity was obtained: 1.27 mol·L −1 HCl and 2.65 mol·L −1 NaCl. Under optimal experimental conditions, the designed processes of Pt(IV) extraction further improved recycling efficiency.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Qian Chen,Haibo Zhu,Fan Fang,Haodong Tang,Yihan Song,Youming Chen,Lei Rao,Andong Zhong,Yihong Tang,Yi Li,Peizhao Liu,Jiaji Cheng,Junjie Hao,Yiwen Li,Wei Chen
PbS quantum dots (QDs) are promising materials for short-wave infrared (SWIR) photodetectors due to their tunable bandgap and broad spectral absorption. This study explores the impact of trioctylphosphine (TOP)-mediated surface reconstruction on PbS QDs, revealing that the TOP treatment enhances QD surface morphology, reduces trap states, and improves QD stacking behavior in solid films. Notably, a diode-type photodetector based on TOP-treated QDs exhibits a significantly enhanced specific detectivity ( D *) of 2.07 × 10 11 Jones at 1290 nm, which is 50 times higher than that of devices using conventional QDs. It also shows a marked reduction in dark current density to 237 nA cm −2 at −0.5 V. Furthermore, the TOP-QD photodetector demonstrates improved storage stability under non-encapsulated conditions, underscoring the effectiveness of TOP-mediated surface reconstruction in enhancing both performance and reliability. This work offers valuable insights into the surface engineering of PbS QDs and presents a pathway for the development of high-performance, solution-processed SWIR imaging systems and environmental monitoring technologies.
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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半导体物理
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红外技术
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DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Yurou Shao,Yangyang Jiang,Dong Wang,Benshuai Guo,Jingyan Zhao,Zhibin Zhou,Jianqiu Chen,Ruixin Guo,Yuntao Lei,Lili Jin
Capturing and recovering carbon dioxide (CO 2 ) from the combustion of fossil fuels is an effective way to reduce carbon emissions, as CO 2 is not only a threat to the environment but also an important C1 feedstock. In the current work, a series of trioctylphosphine oxide (TOPO)-based azole deep eutectic solvents (DESs) have been synthesized for the efficient absorption of CO 2 . The solid–liquid phase diagrams of the DESs were projected using the prediction data from COSMO-RS, and the experimental melting temperature was found to be lower than that of the prediction. These DESs exhibit satisfactory physical properties, including low viscosities (20–60 mPa·s) and high thermal decomposition temperatures (up to 192.5 °C). Furthermore, the CO 2 uptake process was carried out at 35 °C and 0.1 MPa, and the results demonstrated that the CO 2 uptake capacity was positively influenced by hydrogen bond donors (HBDs), mole fraction of HBDs, temperatures, and humidity. Among the DESs, TOPO-imidazole (1:1) was notable for its high absorption capacity of 0.062 mol CO 2 /mol DES, as well as its excellent recyclability. There was no discernible decline in the CO 2 uptake capacity after four absorption–desorption cycles. In this work, NMR and FT-IR investigations indicated the physical absorption mechanism of this system. The designed DESs have the potential to be effective absorbents for efficient reversible CO 2 capture.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Xiao-Hang He,Yu-Lin Yin,Ge Tang,Yi Liu,Feng-Lei Jiang
Trioctylphosphine (TOP) is widely used in the synthetic process of colloidal quantum dots (QDs). However, its role has not been fully elucidated yet. Herein, the role of TOP was revealed by kinetic studies with spectroscopic methods. It was found that TOP suppressed the growth rate but increased the solubility; hence, it modulated QDs by controlling both. The extent of impact from TOP varied in the length of acids that was used in QD synthesis. In general, the impact from TOP to QDs synthesized by short acids was mainly the suppressing effect because shorter aliphatic acids had a higher diffusion rate, and they might suffer from TOP a lot. On the contrary, longer aliphatic acids diffused intrinsically slowly, so the reaction rate was rarely influenced by TOP, but the solubility was supposed to be considered at this time. This difference also led to the optimal amount of TOP used in the synthesis. These results pointed out that both the growth rate and solubility were time-dependent and should be considered to obtain high-quality QDs. In addition, the initial nucleation procedure was also seemingly suppressed by TOP. This work not only shed light on the underlying role of TOP and convinced the controllable synthesis of QDs but also provided a method to investigate the behavior of QD growth by considering several conditions synergistically and dynamically.
研究领域:
材料科学
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化学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 29
·9861-9866
·
IF 7.059
Hanwen Zhu,Yu Tian,Supeng Yang,Yang Shen,Enze Xu,Jianxin Tang,Yang Jiang
Surface engineering and doping are common methods used to enhance the emission properties of perovskite quantum dot light-emitting diodes (PeQLEDs), and more effective methods need to be developed. Here, we introduce a spin-coated trioctylphosphine oxide (TOPO) layer that spontaneously forms concave–convex micro grid structures between the hole-transport layer (TFB) and the CsPbBr3 quantum dot (QD) layer. The unique concave–convex micro grid structures change with the concentration of TOPO solution and the type of solvent, which may be caused by the surface tension. Spectral measurements reveal that the TOPO layer passivates the surface defects between the perovskite QDs. The finite-difference-time-domain (FDTD) method proves that these concave–convex micro grid structures also increase light output from the quantum dot light-emitting diodes (QLEDs). As a result, green perovskite QD light emitting diodes (LEDs) of 514 nm with a Luminous Efficiency (LE) of 3975 cd m−2, Current Efficiency (CE) of 18.8 cd A−1 and External Quantum Efficiency (EQE) of 6.7% can be achieved, which are improved three-fold compared to the CsPbBr3 QLEDs without the TOPO layer. Our work suggests that the micro grid structures of the TOPO layer provide a novel and facile way to enhance the performance of the perovskite QLEDs.
研究领域:
材料科学
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光电子学
·
纳米技术
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DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Hao Hao,Hui-Ling Hu,Yi Liu,Feng-Lei Jiang
In this work, CdSe/ZnS core/shell quantum dots (QDs) were synthesized. Dilution of the as-synthesized QDs would lead to instability with photoluminescence (PL) quenching. It was found that the addition of tertiary phosphine and alkylthiol could recover the PL intensity of diluted QDs and make these QDs stable. Specifically, the recovery efficiency of tertiary phosphine was stronger than that of alkylthiol. Trioctylphosphine (TOP) and octanethiol (OT) were chosen as the representative ligands, respectively. Isothermal titration calorimetry (ITC) demonstrated that interactions between both TOP/OT and QDs were exothermic and spontaneous. The interaction between TOP and QDs was mainly driven by van der Waals forces due to the branched structure. This interaction had a negative entropy change, while the interaction between OT and QDs had a positive entropy change. There were about ∼12 TOP molecules and ∼17 OT molecules bound to a QD particle. The binding constants of TOP/OT to QDs were 1.6 × 103 and 12.8 × 103 M–1, respectively. The reaction rate between TOP and QDs was fast, and the addition of OT could slow the reaction rate constant from 0.081 to 0.024 min–1. PL decay indicated that TOP and OT could increase the radiative recombination of excitons. Furthermore, both TOP and OT could greatly improve the brightness of the QD films, which was a prerequisite for the efficient improvement of quantum dot light-emitting diodes. This work explicitly investigated the dilution process of QDs, explored the methods for keeping diluted QDs stable and bright, and highlighted the importance of surface ligands.
研究领域:
材料科学
·
光学
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DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 30
·21307-21317
·
IF 3.9
Tian Xie,Han Qu,Chao Zhang,Zheng Li
Lithium extraction from salt lake brine is still challenging due to the existence of similar elements, e.g. sodium. In the present work, polysulfone (PSF) microcapsules containing 1-phenylazo-2-naphthol (HS) and trioctylphosphine oxide (TOPO) as extractants were successfully prepared by microfluidic technology for the separation of Li+ from brine with Li+ and Na+. The morphology, composition, and structure of HS-TOPO-based microcapsules were characterized systematically. The results showed that microcapsules consisting of 20 wt% (m m−1) polysulfone and 80 wt% (m m−1) 1-phenylazo-2-naphthol-trioctylphosphine oxide as the extractant, which was labeled as PSF/HS-TOPO-2/8, exhibited the best performance for Li+ adsorption. The separation factor (SF) of Li+ over Na+ is up to 653 and the adsorption capacity for Li+ in the simulated brine could reach 3.67 mg g−1 for microcapsules PSF/HS-TOPO-2/8, which demonstrated that Li+ can be separated with high selectivity. Besides, the kinetic results demonstrated that the adsorption followed quasi-secondary adsorption kinetic models, indicating that the adsorption mechanism of lithium by microcapsules involved chemisorption. After ten cycles of adsorption–elution, the maximum equilibrium adsorption capacity still remained at 87%. All these results demonstrate that PSF/HS-TOPO-2/8 microcapsules can be used as an efficient adsorber for the adsorption of Li+ from brine with high selectivity and stability.
研究领域:
材料科学
·
化学工程
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）