Presentation Information
[7p-S201-8]Response Time of Quasi-2-dimensional Epitaxially Connected Quantum Dots Superlattice Photodetectors
〇(D)Dadan Suhendar1, Chisa Nishiyama1, Ricky Dwi Septianto2,1, Satria Zulkarnaen Bisri1,2 (1.Tokyo University of Agriculture and Technology, 2.RIKEN Center for Emergent Matter Science (CEMS))
Keywords:
Photodetector,Colloidal Quantum Dot,Epitaxially-connected superlattices
There have been increasing demands for high-performance photodetectors with a broad spectral detection range and fast response times for next-generation electronic and optoelectronic applications. Colloidal quantum dots (CQDs) offer a unique set of properties to tackle many of the vital challenges. However, the spatial and energetic disorder in CQD assemblies often results in low transport mobility and charge trapping, limiting their practical performance, particularly in terms of response time. Recently, epitaxially-connected quantum dot superlattices (QD-SLs) have been developed, featuring improved structural order and reduced energetic disorder, leading to enhanced mobility. We present a high-performance planar photodetector built from a monolayer of quasi-2D epitaxially connected PbS QD-SLs. This photodetector shows a stable on-off ratio and fast response time comparable to hybrid QD-on-2D material devices. This work provides valuable insights into optimizing colloidal QD photodetectors for applications requiring high sensitivity and fast optical signal processing.