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Cu(Inx 1

Ga1–x)Se2 1

激光烧蚀短程热效应 1

由P1引起的功率损耗 1

电池到模块的效率差距 1

高光谱光致发光 1

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Long-lasting photoluminescence quantum yield of cesium lead halide perovskite-type quantum dots

Yonghyun Kim, Huiwen Liu, Yi Liu, Boa Jin, Hao Zhang, Wenjing Tian, Chan Im

《化学科学与工程前沿（英文）》 2021年 第15卷 第1期   页码 187-197 doi: 10.1007/s11705-020-1931-z

摘要： Cesium lead halide perovskite (CsPbX , X= Cl, Br, I) quantum dots (QDs) and their partly Mn -substituted QDs (CsPb Mn X ) attract considerable attention owing to their unique photoluminescence (PL) efficiencies. The two types of QDs, having different PL decay dynamics, needed to be further investigated in a form of aggregates to understand their solid-state-induced exciton dynamics in conjunction with their behaviors upon degradation to achieve practical applications of those promising QDs. However, thus far, these QDs have not been sufficiently investigated to obtain deep insights related to the long-term stability of their PL properties as aggregated solid-states. Therefore, in this study, we comparatively examined CsPbX - and CsPb Mn X -type QDs stocked for>50 d under dark ambient conditions by using excitation wavelength-dependent PL quantum yield and time-resolved PL spectroscopy. These investigations were performed with powder samples in addition to solutions to determine the influence of the inter-QD interaction of the aged QD aggregates on their radiative decays. It turns out that the Mn -substituted QDs exhibited long-lasting PL quantum efficiencies, while the unsubstituted CsPbX -type QDs exhibited a drastic reduction of their PL efficiencies. And the obtained PL traces were clearly sensitive to the sample status. This is discussed with the possible interaction depending on the size and distance of the QD aggregates.

关键词： quantum dots     cesium lead halide perovskite     time-resolved photoluminescence     PL quantum yield     QD aggregates    

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Plasma-electrochemical synthesis of europium doped cerium oxide nanoparticles

Liangliang Lin, Xintong Ma, Sirui Li, Marly Wouters, Volker Hessel

《化学科学与工程前沿（英文）》 2019年 第13卷 第3期   页码 501-510 doi: 10.1007/s11705-019-1810-7

摘要： In the present study, a plasma-electrochemical method was demonstrated for the synthesis of europium doped ceria nanoparticles. Ce(NO ) ·6H O and Eu(NO ) ·5H O were used as the starting materials and being dissolved in the distilled water as the electrolyte solution. The plasma-liquid interaction process was investigated by an optical emission spectroscopy, and the obtained products were characterized by complementary analytical methods. Results showed that crystalline cubic CeO :Eu nanoparticles were successfully obtained, with a particle size in the range from 30 to 60 nm. The crystal structure didn’t change during the calcination at a temperature from 400°C to 1000°C, with the average crystallite size being estimated to be 52 nm at 1000°C. Eu ions were shown to be effectively and uniformly doped into the CeO lattices. As a result, the obtained nanophosphors emit apparent red color under the UV irradiation, which can be easily observed by naked eye. The photoluminescence spectrum further proves the downshift behavior of the obtained products, where characteristic D → F transitions of Eu ions had been detected. Due to the simple, flexible and environmental friendly process, this plasma-electrochemical method should have great potential for the synthesis of a series of nanophosphors, especially for bio-application purpose.

关键词： plasma-electrochemical method     europium doped ceria     rare earth nanoparticles     photoluminescence    

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Simplistic hydrothermal synthesis approach for fabricating photoluminescent carbon dots and its potential application as an efficient sensor probe for toxic lead(II) ion detection

《化学科学与工程前沿（英文）》 2023年 第17卷 第5期   页码 536-547 doi: 10.1007/s11705-022-2239-y

摘要： The past decade has witnessed a variety of members of the carbon family along with exposure of carbon dots due to their magnificent properties in sensing, bioimaging, catalytic applications, biomedical fields, and so on. Herein, we report the simple hydrothermal method to fabricate photoluminescent doped carbon quantum dots for the detection of noxious lead(II) ions. Lead(II) ion is very venomous for both the environment and human health for which its detection is demanded area in the research field. The as-prepared carbon dots show excellent photostability, low toxicity and significant photoluminescence properties along with good water solubility. Along with these properties, carbon dots have a quantum yield of approximately 15%. In the practical field of application, these carbon dots have been used as sensing probes for the detection of lead(II) ions with a detection limit of 60 nmol·L–1. The fluorescence intensity of carbon dots was remarkably quenched in the presence of the lead(II) ion selectively among all the tested metal ions. Furthermore, we have studied the Stern–Volmer relationship for lead(II) quenching along with the explanation of the probable quenching mechanism. Ability of the doped carbon dots in heavy metal ions sensing in an environmental sample was demonstrated.

关键词： carbon dots     fluorescence     heavy metal sensing     practical application     photoluminescence    

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用高光谱发光法研究Cu(Inx,Ga1–x)Se2 (CIGS)模块中由P1引起的功率损耗的成因 Article

César Omar Ramírez Quiroz, Laura-Isabelle Dion-Bertrand, Christoph J. Brabec, Joachim Müller, Kay Orgassa

《工程（英文）》 2020年 第6卷 第12期   页码 1395-1402 doi: 10.1016/j.eng.2019.12.019

摘要：

在本文中，我们利用了高光谱高分辨率光致发光映射技术，这是一个强大的工具，可用于选择和优化在Cu(Inx,Ga1-x)Se2（CIGS）模块上对子电池进行图案化互连的激光烧蚀工艺。通过这种方式，我们可以完成对消融区域附近材料降解的深度监测以及对潜在机制的识别。具体而言，通过分析在CIGS沉积之前烧蚀的标准P1图案线，我们发现了沿着下部的钼槽边缘的异常发射猝灭效应。通过扫描电子显微镜（SEM）比较了P1边缘的横截面的形貌，我们进一步合理化产生这种效应的起因，但无法用厚度变化解释光发射的减少。我们还研究了激光诱导对CIGS沉积后的P1图案线带来的损伤。然后，我们首次记录了短距离损坏区域，该区域与在激光路径上应用的光学孔径无关。我们的发现能更好地理解P1引起的功率损耗，并为改进与行业相关的模块互连方案提供了新的见解。

关键词： Cu(Inx     Ga1–x)Se2     电池到模块的效率差距     由P1引起的功率损耗     高光谱光致发光     激光烧蚀短程热效应    

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标题 作者 时间 类型 操作

Long-lasting photoluminescence quantum yield of cesium lead halide perovskite-type quantum dots

Yonghyun Kim, Huiwen Liu, Yi Liu, Boa Jin, Hao Zhang, Wenjing Tian, Chan Im

期刊论文

Plasma-electrochemical synthesis of europium doped cerium oxide nanoparticles

Liangliang Lin, Xintong Ma, Sirui Li, Marly Wouters, Volker Hessel

期刊论文

Simplistic hydrothermal synthesis approach for fabricating photoluminescent carbon dots and its potential application as an efficient sensor probe for toxic lead(II) ion detection

期刊论文

用高光谱发光法研究Cu(Inx,Ga1–x)Se2 (CIGS)模块中由P1引起的功率损耗的成因

César Omar Ramírez Quiroz, Laura-Isabelle Dion-Bertrand, Christoph J. Brabec, Joachim Müller, Kay Orgassa

期刊论文