Luminescent carbon dots (CDs) are of significant practical application interest such as in optoelectronic devices and sensitive probing in the life science and environment fields. In this study, N doped CDs-CdTe quantum dots (QDs) nanohybrids (CdTe/N-CDs) were synthesized by a plasma heating process using silk fibroin and CdTe QDs as precursors. The synthesis, doping, hybridizing and passivation of the CdTe/N-CDs were carried out in a single-step process. The as-synthesized CdTe/N-CDs dispersed in ethanol exhibited blue-violet photoluminescence with excitation-independent emission characteristics (strong emissions at 405 nm and 429 nm, and a weak emission at 456 nm). Additionally, the optimal excitation wavelength for the CdTe/N-CDs was found at 360–380 nm, which very closely matches the intrinsic wavelength of GaN-based LEDs. Furthermore, the obtained CdTe/N-CDs exhibited a very high quantum yield of ∼84%, showing great potential in developing chip-based high performance optoelectronics devices. The emission mechanism and emission enhancement by related factors including N-bonded configurations in the carbon base and the transfer of photo-excited electrons from the CdTe QDs to the N doped CDs were studied, as well.

中文翻译：

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在蓝紫色区域具有与激发无关的发射的超高荧光 N 掺杂碳点-CdTe QDs 纳米杂化物†

发光碳点 (CD) 具有重要的实际应用价值，例如在生命科学和环境领域的光电子器件和敏感探测中。在这项研究中，使用丝素蛋白和 CdTe 量子点作为前体，通过等离子体加热工艺合成了 N 掺杂的 CDs-CdTe 量子点 (QDs) 纳米杂化物 (CdTe/N-CDs)。CdTe/N-CDs的合成、掺杂、杂化和钝化在一个步骤过程中进行。分散在乙醇中的合成 CdTe/N-CDs 表现出蓝紫色光致发光，具有与激发无关的发射特性（在 405 nm 和 429 nm 处有强发射，在 456 nm 处有弱发射）。此外，CdTe/N-CD 的最佳激发波长为 360-380 nm，与 GaN 基 LED 的固有波长非常接近。此外，所获得的 CdTe/N-CDs 表现出 84% 的非常高的量子产率，在开发基于芯片的高性能光电子器件方面显示出巨大的潜力。还研究了相关因素的发射机制和发射增强，包括碳基中的 N 键配置和光激发电子从 CdTe QD 到 N 掺杂 CD 的转移。