[16p-C301-1~18] 9.2 Nanoparticles, Nanowires and Nanosheets

3:00 PM - 3:15 PM JST(6:00 AM - 6:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation AwardEnglish Presentation

[16p-C301-7] Correlation Between Assembly Orders and Performance of PbS Colloidal Quantum Dot Photodetectors

〇(D)Dadan Suhendar¹, Yuto Aoki¹, Ricky Dwi Septianto^2,1, Satria Zulkarnaen Bisri^1,2 (1.Tokyo Univ. Agri. & Tech., 2.RIKEN CEMS)

Keywords:

Photodetector,Colloidal Quantum Dot,Epitaxially-connected superlattices

The implementation of colloidal quantum dots (CQDs) into high-performing photodetectors still faces several challenges especially from poor photocarrier collection due to the modest charge carrier mobility. Recently, Superlattices of epitaxially-connected QDs demonstrated high electron mobility values. Here, we demonstrate that the enhancements of the assembly order quality of CQDs and the precise control of the superlattice structure formation significantly increase the photodetectors’ current density and photoresponsivity. We may attribute the performance enhancement of the photodetector device mainly due to the improvement of the charge carrier extraction caused by higher mobility values while the quantum confinement effect is still well-preserved.