[16a-W9_326-1~10] 3.12 Semiconductor optical devices

11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)English Presentation

[16a-W9_326-10] Enhanced Performance and Air-Stability of Quantum Dot Superlattice Photodetectors Using Block-Copolymer Passivation

〇(D)Dadan Suhendar¹, Chisa Nishiyama¹, Ricky Dwi Septianto^3,2,1, Satria Zulkarnaen Bisri^1,2 (1.Tokyo Univ. Agri. & Tech, 2.RIKEN CEMS, 3.BRIN Indonesia)

Keywords:

Colloidal quantum dot,Photodetector stability,Epitaxially-connected superlattices

Photodetectors based on Epi-QDSLs exhibit impressive performance with significantly enhanced responsivity and detectivity, positioning them as a promising platform for the next generation of high-performance photodetectors. However, PbS quantum dots (QDs) suffer from poor stability in ambient air, which restricts their long-term efficacy. To overcome this challenge, we developed an air-stable PbS epi-QDSL photodetector by incorporating a thin film of polyvinylidene fluoride (PVDF)-based block copolymer as a passivation layer. This passivation layer not only enhances the stability of the device under ambient conditions. Furthermore, the photodetector's performance is significantly improved compared to that without a passivation layer.