Visualizing Motion Trail via Phosphorescence Carbon Nanodots-Based Delay Display Array

Area of Science:

• Materials Science
• Nanotechnology
• Optoelectronics

Background:

• Visually intriguing scenes with both old and instant events and clear motion trails convey change and evolution.
• Eco-friendly delay display systems are needed to fuse past and present events for motion trail visualization.

Purpose of the Study:

• To develop an eco-friendly delay display system using carbon nanodots (CNDs).
• To enhance the phosphorescence efficiency and lifetime of CNDs for improved motion trail recognition.

Main Methods:

• Utilized a multidimensional confinement strategy to brighten triplet excitons in CNDs and increase emission yield.
• Fabricated a 4 × 4 CND-based delay display array to demonstrate the system's capabilities.

Main Results:

• Achieved a 240% enhancement in phosphorescence efficiency and a 260% enhancement in CND lifetime due to intense confinement effects suppressing nonradiative transitions.
• Demonstrated ultralong phosphorescence exceeding 7 seconds with the CND-based delay display array.
• Successfully recorded motion from different timelines clearly, showcasing the system's potential for motion trail recognition.

Conclusions:

• The multidimensional confinement strategy effectively enhances CND phosphorescence properties.
• The developed CND-based delay display array offers a promising platform for visualizing motion trails.
• This research motivates further investigation of phosphorescent CNDs in motion trail recognition applications.