Overall
- Language
- English
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
- Publication history
-
Received April 30, 2024
Accepted August 24, 2024
-
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Most Cited
Colloidal Quantum Dot Solid-Based Infrared Optoelectronics Enabled by Solution-Phase Ligand Exchange
Abstract
This study explores the rational strategy to build lead sulfi de (PbS)-based colloidal quantum dots (CQDs) solid for high
performance photodetection and solar energy conversion in the near- and short-wave infrared spectra. We demonstrated a
facile engineering process from CQD synthesis to infrared CQD devices fabrication. By controlling the monomer concentration,
we eff ectively tuned the infrared absorption characteristics and the solution-phase surface ligand exchange resulted
in highly concentrated CQD ink, facilitating the formation of uniform, and thick CQD solids, which is crucial for high
absorption effi ciency. The CQD-based infrared photodetector achieved a specifi c detectivity of approximately 10 11 Jones
and fast response times under 100 ns. Furthermore, optimized PbS CQDs were utilized in solar cells and achieved high
quantum effi ciency across visible to infrared spectrum, indicating a signifi cant potential for 2-terminal tandem structures
with perovskite front cells.