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Surface Modification of Ti3CN MXene and Their Enhanced Performance in Photodetection
Mingli Qin1, Jiale Ai1, Artem V Kuklin2
1College of Material Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Zhejiang Key Laboratory of Organosilicon Material Technology, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, P. R. China.
This study enhances Ti3CN MXene by adding bismuth quantum dots, creating a Ti3CN@Bi heterojunction. This novel material improves photodetector performance, offering faster response and better stability for optoelectronic applications.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Titanium carbonitride (Ti3CN) MXene exhibits promising carrier dynamics and nonlinear optical properties.
- Pristine Ti3CN suffers from rapid carrier recombination, limiting its photo-response efficiency.
- MXene-based heterostructures are crucial for advancing optoelectronic device performance.
Purpose of the Study:
- To engineer a Ti3CN@Bi heterojunction to overcome the limitations of pristine Ti3CN.
- To enhance the photo-response and stability of MXene-based photodetectors.
- To explore the potential of bismuth quantum dot modification for optoelectronic applications.
Main Methods:
- Fabrication of multi-layer Ti3CN MXene modified with well-dispersed bismuth (Bi) quantum dots.
- Characterization of the Ti3CN@Bi heterojunction's optical absorption and energy transfer properties.
- Fabrication and testing of Ti3CN@Bi-based photodetectors to evaluate performance metrics.
Main Results:
- The Ti3CN@Bi heterojunction effectively tuned optical absorption and introduced new energy transfer pathways.
- A built-in electric field in Ti3CN@Bi enabled self-powered photodetector operation.
- Achieved high photocurrent density (18.24 µA cm⁻²) and photoresponsivity (18.32 mA W⁻¹).
- Demonstrated fast response times and exceptional stability (0.002% degradation per cycle).
Conclusions:
- The Ti3CN@Bi heterojunction significantly enhances photodetector performance compared to pristine Ti3CN.
- This work validates the potential of MXene-based heterojunctions for advanced optoelectronic devices.
- The developed material holds promise for practical applications in photodetectors and beyond.
