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Updated: Jun 12, 2025

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通过单光子计数技术追踪量子点发光二极管中的电子传输行为

Qiang Su1,2, Zinan Chen1, Shuming Chen3

  • 1Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, PR China.

Nature communications
|September 17, 2024
PubMed
概括

量子点发光二极管中的泄漏电子降低了效率. 一种新的技术可视化了这些电子路径,通过减少泄漏,实现了高内部功率转换效率超过98%的高效率.

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Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
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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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