Colloidal Quantum Dot Solid-Based Infrared Optoelectronics Enabled by Solution-Phase Ligand Exchange

This study explores the rational strategy to build lead sulfide (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 CQ...

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Bibliographic Details
Published in:The Korean journal of chemical engineering 2024, 41(13), 298, pp.3561-3572
Main Authors: Si, Min-Jae, Kim, Dongeon, Jeong, Seoryeon, Yang, Minjung, Kim, Jeongeun, Lee, Seo-Young, Lee, In-Suh, Jeong, Jaewoo, Kim, Byeong-Chan, Han, Taeho, Kim, Beomkwan, Ahn, Yongnam, Jee, Seungin, Jung, Yujin, Baek, Se-Woong
Format: Article
Language:English
Subjects:
Biotechnology
Catalysis
Chemistry
Chemistry and Materials Science
Colloiding
Energy conversion efficiency
Industrial Chemistry/Chemical Engineering
Infrared absorption
Infrared detectors
Infrared spectra
Lead sulfides
Ligands
Materials Science
Optoelectronics
Original Article
Perovskites
Photovoltaic cells
Quantum dots
Quantum efficiency
Short wave radiation
Solar cells
Solar energy conversion
화학공학
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Summary:This study explores the rational strategy to build lead sulfide (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 effectively 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 efficiency. The CQD-based infrared photodetector achieved a specific 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 efficiency across visible to infrared spectrum, indicating a significant potential for 2-terminal tandem structures with perovskite front cells.
ISSN:0256-1115
1975-7220
DOI:10.1007/s11814-024-00268-1