Efficient and High Color‐Purity Red and Deep‐Red Circularly Polarized Luminescence From Carbon Quantum Dots Enabled by Helical Co‐Assembly Strategy DOI

Jinsui Li,

Wendi Qin,

Chenhao Li

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Июнь 4, 2025

Abstract Quantum dots (QDs) are emerging as promising emitters for achieving efficient and high color‐purity narrowband circularly polarized luminescence (CPL), which holds great promise 3D flexible stereoscopic displays. However, the currently reported CPL from QD primarily relies on conventional heavy‐metal Cd/Pb‐based QDs, suffer significant toxicity issues thus severely limit their potential widespread applications. In this study, first instance of efficient, derived environmentally friendly carbon QDs (CQDs) is presented. By incorporating red deep‐red CQDs (RCQDs DRCQDs) with nematic liquid crystals E7 chiral dopants R/S5011, it has formed CQDs‐chiral (CQDs‐CLCs) composites through a helical co‐assembly approach. These CQDs‐CLCs exhibit remarkable optical properties, featuring sharp emission peaks ultranarrow full width at half maximum values 22 nm DRCQDs‐CLCs 37 RCQDs‐CLCs, coupled dissymmetry factor (g lum ) reaching 1.26. Furthermore, by modulating photonic bandgap (PBG), can effectively control even reverse signals, particularly g value. innovative materials successfully implemented in multilevel anticounterfeiting designs information encryption

Язык: Английский

Efficient and High Color‐Purity Red and Deep‐Red Circularly Polarized Luminescence From Carbon Quantum Dots Enabled by Helical Co‐Assembly Strategy DOI

Jinsui Li,

Wendi Qin,

Chenhao Li

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Июнь 4, 2025

Abstract Quantum dots (QDs) are emerging as promising emitters for achieving efficient and high color‐purity narrowband circularly polarized luminescence (CPL), which holds great promise 3D flexible stereoscopic displays. However, the currently reported CPL from QD primarily relies on conventional heavy‐metal Cd/Pb‐based QDs, suffer significant toxicity issues thus severely limit their potential widespread applications. In this study, first instance of efficient, derived environmentally friendly carbon QDs (CQDs) is presented. By incorporating red deep‐red CQDs (RCQDs DRCQDs) with nematic liquid crystals E7 chiral dopants R/S5011, it has formed CQDs‐chiral (CQDs‐CLCs) composites through a helical co‐assembly approach. These CQDs‐CLCs exhibit remarkable optical properties, featuring sharp emission peaks ultranarrow full width at half maximum values 22 nm DRCQDs‐CLCs 37 RCQDs‐CLCs, coupled dissymmetry factor (g lum ) reaching 1.26. Furthermore, by modulating photonic bandgap (PBG), can effectively control even reverse signals, particularly g value. innovative materials successfully implemented in multilevel anticounterfeiting designs information encryption

Язык: Английский

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