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<p>White-light-emitting materials based on environmentally benign and solution-processable components are of considerable interest for next-generation solid-state lighting. In particular, hybrid systems that combine organic or polymeric emitters with cadmium-free quantum dots offer opportunities for spectral tunability while avoiding toxic heavy metals. Herein, we report white-light emission from a hybrid material composed of graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub> denoted as gCN) and Cu–In–Zn–S quaternary quantum dots (denoted as CIZS QDs). The CIZS QDs were synthesized via a solvothermal route, while gCN was obtained through a thermolysis process. The CIZS QDs exhibit broadband photoluminescence in the 500–710&#xa0;nm range with an apparent emission maximum in the yellowish-orange region with a quantum yield of 25.4%, whereas gCN shows blue emission spanning 400–510&#xa0;nm with a quantum yield of 18.2%. By optimizing the relative concentrations of gCN (0.17&#xa0;mg&#xa0;mL<sup>−1</sup>) and CIZS QDs (0.52&#xa0;mg&#xa0;mL<sup>−1</sup>), balanced white-light emission was achieved with CIE chromaticity coordinates of (0.35, 0.32), a correlated color temperature of 4638&#xa0;K, and a color rendering index of 76. The results demonstrate a proof-of-concept cadmium-free hybrid strategy for generating white light through spectral complementarity and interfacial energy transfer, providing insights for the development of tunable white-light-emitting materials.</p>

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White light emission from a hybrid system of CIZS inorganic quantum dots and graphitic carbon nitride organic semiconductor

  • 期刊论文

  • 发表日期：

    2026年4月13日

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  • D. K. Swetha,
  • Ilaiyaraja Perumal

摘要

White-light-emitting materials based on environmentally benign and solution-processable components are of considerable interest for next-generation solid-state lighting. In particular, hybrid systems that combine organic or polymeric emitters with cadmium-free quantum dots offer opportunities for spectral tunability while avoiding toxic heavy metals. Herein, we report white-light emission from a hybrid material composed of graphitic carbon nitride (g-C3N4 denoted as gCN) and Cu–In–Zn–S quaternary quantum dots (denoted as CIZS QDs). The CIZS QDs were synthesized via a solvothermal route, while gCN was obtained through a thermolysis process. The CIZS QDs exhibit broadband photoluminescence in the 500–710 nm range with an apparent emission maximum in the yellowish-orange region with a quantum yield of 25.4%, whereas gCN shows blue emission spanning 400–510 nm with a quantum yield of 18.2%. By optimizing the relative concentrations of gCN (0.17 mg mL−1) and CIZS QDs (0.52 mg mL−1), balanced white-light emission was achieved with CIE chromaticity coordinates of (0.35, 0.32), a correlated color temperature of 4638 K, and a color rendering index of 76. The results demonstrate a proof-of-concept cadmium-free hybrid strategy for generating white light through spectral complementarity and interfacial energy transfer, providing insights for the development of tunable white-light-emitting materials.