Abstract The low cost and fine‐tunability of the luminescence of copper nanoclusters make them attractive candidates for opto‐electronic, imaging, and sensing applications; their stability, and a precise understanding of the structure–function correlations however, continue to be challenging. A comprehensive chemical etching strategy is developed to synthesize orange, blue, and cyan emitting nanoclusters from a single source of ultrasmall copper nanoparticles; high quantum yields up to ≈34% are realized. Steady state and time‐resolved spectroscopy, electron microscopy, high resolution mass spectrometry, and computational modeling provide critical mechanistic insight into the polychromatic luminescence. A facile method for the fabrication of polymer nanocomposite thin films that sustain and stabilize the luminescent nanoclusters is presented. A subtle variation of the etching strategy without the need to admix multiple components, provides white luminescent thin films with Commission Internationale de l'éclairage (CIE) coordinates, x = 0.35, y = 0.33. The highlights of this work are i) the simple solution synthesis of stable, uniform, and pure ultrasmall Cu nanoparticles, ii) their chemical etching by subtle variations in an optimized protocol to produce highly luminescent, polychromatic nanoclusters, including white‐emitting ones, iii) stabilization of the bright luminescent systems in nanocomposite thin films, and iv) a detailed analysis of the luminescence tuning.

Niladri Sarkar

T. P. Radhakrishnan

Advanced Optical Materials

先进光学材料的范围致力于光子学、等离子体激元学、超材料等方面的突破性发现和基础研究。以下是高级光学材料中涵盖的主题的非详尽列表：光子晶体非线性光学光学纳米结构光电子学光学器件、探测器和传感器全息光声材料光学数据存储微/纳米谐振器光波导。

The journal "Advanced Optical Materials" focuses on groundbreaking discoveries and fundamental research in the fields of photonics, plasmonics, and metamaterials. Topics covered include, but are not limited to: photonic crystals, nonlinear optics, optical nanostructures, optoelectronics, optical devices, detectors and sensors, holography, photoacoustic materials, optical data storage, micro/nano resonators, and optical waveguides.

《Advanced Optical Materials》期刊专注于光子学、等离子体激元学、超材料等领域的突破性发现和基础研究。期刊涵盖的主题包括但不限于：光子晶体、非线性光学、光学纳米结构、光电子学、光学器件、探测器和传感器、全息技术、光声材料、光学数据存储、微/纳米谐振器及光波导等。

Category	Quartile
材料科学	2
材料科学, 材料科学综合	2
材料科学, 光学	2

Single Source Polychromatic Luminescent and White Emitting Copper Nanoclusters

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