Solution-Processed 1-Thioglycerol Capped PbS Colloidal Quantum Dots for Single-Layer Photodetectors
Owing to their high molar extinction coefficient, broad light absorption range, and excellent air stability, lead sulfide (PbS) colloidal quantum dots (CQDs) are increasingly regarded as one of the most promising material candidates for next-generation low-cost flexible photodetectors.
Here a solution-processed 1-thioglycerol (TG) capped PbS CQDs were obtained by a biphasic system ligand exchange approach, and which were applied in photodetector fabrication. The TG-PbS based single-layer device exhibits good performance with rise/decay time of 0.36/0.64 s, responsivity of
0.35 A W−1, and detectivity of 0.77×1012 Jones. Meanwhile, the device can be fabricated on flexible polyimide (PI) substrate, signaling its potential applications in flexible optoelectronics.
Keywords: Flexible Device; Ligand Exchange; PbS Colloidal Quantum Dots; Photodetector
Document Type: Research Article
Affiliations: 1: Key Laboratory for Advanced Materials, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China 2: Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry Chinese Academy of Sciences, Beijing 100190, China
Publication date: 01 November 2018
- Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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