Facile fabrication of quantum junction photodetectors based on PbSe Quantum Dots

Ruixue Lv; Zhiming Wu; Tao Tuo; Jun Wang

doi:10.1117/12.2687361

6 November 2023 Facile fabrication of quantum junction photodetectors based on PbSe Quantum Dots

Ruixue Lv, Zhiming Wu, Tao Tuo, Jun Wang

Proceedings Volume 12921, Third International Computing Imaging Conference (CITA 2023); 1292104 (2023) https://doi.org/10.1117/12.2687361
Event: Third International Computing Imaging Conference (CITA 2023), 2023, Sydney, Australia

Abstract

Benefiting from its advantages such as wide tunable bandgap, solution synthesis, and substrate selection diversity, Lead Selenide Colloidal Quantum Dots (PbSe CQDs) has gradually been selected as a highly competitive candidate material for next-generation low-cost, flexible, and broad-spectrum photodetectors. At present, PbSe CQDs-based photodetectors with photoconductive structures have the problems of large dark current and slow photoresponse. However, the manufacturing process of photovoltaic field effect transistors and two-dimensional material quantum dot hybrid structure devices is complicated, and the cost is high. These problems will limit the improvement of the overall performance of the device. For a better performance-cost trade-off, here a junction photodetector is designed using only PbSe, and the device is fabricated on oxygen-silicon substrate. Its response speed is significantly higher than that of photoconductive devices, especially the dark recovery speed is one order of magnitude higher than that of PbS devices with the same structure, while maintain a D* similar to the two-dimensional quasi-zero-dimensional hybrid structure. The findings have inspirational meaning for the design of future advanced CQDs photodetectors.

Citation Download Citation

Ruixue Lv, Zhiming Wu, Tao Tuo, and Jun Wang "Facile fabrication of quantum junction photodetectors based on PbSe Quantum Dots", Proc. SPIE 12921, Third International Computing Imaging Conference (CITA 2023), 1292104 (6 November 2023); https://doi.org/10.1117/12.2687361

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