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Photoluminescence: Applications

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...

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Updated: Jan 7, 2026

Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation

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Published on: October 1, 2019

可编程光驱色调的矿量子点的可编程光驱色调

Pragyan Jha¹, Nikolai Mukhin¹, Jinge Xu¹

¹Dept. of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27606, United States.

ACS central science

|December 31, 2025

概括

我们开发了一个自动驾驶实验室,使用光线精确调整金属化物矿纳米晶带隙. 这种方法优化了光学性能,并有效地适用于工业应用.

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Inkjet Printing All Inorganic Halide Perovskite Inks for Photovoltaic Applications

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Published on: January 22, 2019

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Last Updated: Jan 7, 2026

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Published on: October 1, 2019

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科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
纳米技术纳米技术

背景情况:

金属化物矿 (MHP) 纳米晶体 (NCs) 的精确带隙调整对于光电子和光催化是至关重要的.
光诱导离子交换反应 (PIAERs) 提供了控制,但由于巨大的参数空间,在机械理解和优化方面面临挑战.

研究的目的:

开发一个物质效率高,用于优化MHP中PIAER的自主系统.
为了使MHP纳米晶体在UV可见光谱中进行精确,可扩展和可持续的带隙调整.

主要方法:

在一个流体自动驾驶实验室 (FSDL) 中集成单滴微流体光反应器,现场光谱和贝叶斯优化.
通过机器学习引导复杂参数格局的探索,以确定最佳合成条件.
替代建模以获得对离子交换动力学的机械洞察力.

主要成果:

FSDL自主确定了合成条件,最大限度地提高光发光量子产量,最大限度地减少目标波长的辐射线宽度.
发现了Br^-→Cl^-和Br^-→I^-交换的不同动态,从而实现了反应特定的调整.
协议从滴量 (∼10μL) 扩展到连续流量 (∼50-250mL·day-1) 没有重新优化,保持性能并证明知识可扩展性在吞吐量中超过4个数量级.

结论:

FSDL提供了一个可重复的,机械上知情的路线,用于MHPNC中的可编程的,光导向的带隙调整.
这种方法具有工业相关性,可扩展性和能源效率,为先进的MHP应用铺平了道路.