Suppressing Colloidal Quantum Dot Multimer Fusion Leads to High-Performance InSb Infrared Photodetectors.

ABSTRACT: Environmentally friendly InSb colloidal quantum dots (CQDs) short-wave infrared (SWIR) photodetectors feature characteristics of low-cost, high-volume scalability, CMOS integrability, and compliance with RoHS regulations, and hold great commercial potential. Yet, their performance falls short of commercially relevant specifications. In this work, it is posited that CQD fusion observed in these dots leads to the formation of band-tail trap states and it is further demonstrated that avoidance of such band-tail trap states is crucial for device performance. By doing so, InSb CQDs SWIR photodetectors are reported with compelling performance metrics, including a dark current of 4 µA cm^-2, EQE of ≈20% (at -1 V), a linear dynamic range over 140 dB and a response time of 90 ns. This rep

SUBMITTER: Peng L 

PROVIDER: S-EPMC12279176 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature