ArticleNanomaterials (Basel, Switzerland)2023
Impact of Surface Trap States on Electron and Energy Transfer in CdSe Quantum Dots Studied by Femtosecond Transient Absorption Spectroscopy.
Article in Nanomaterials (Basel, Switzerland), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Quantum dot sensors for heavy metal detection: from mechanistic design to field deployment: a review.RSC advances · 2026Review
- Trioctylamine in the Synthesis of Tris(trimethylsilyl)arsine-Based InAs Quantum Dots Prevents the Formation of Si-Based Byproducts.Journal of the American Chemical Society · 2025Article
- Powering Molecular Motors with Light Across the Rainbow Using Quantum Dots.Journal of the American Chemical Society · 2025Article
- Carbon Dots for Nucleic Acid-Based Diagnostics and Therapeutics: Focus on Oxidative DNA Damage.International journal of molecular sciences · 2025Review
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Authors and funding
6 authors.
Funding
Abstract
The presence of surface trap states (STSs) is one of the key factors to affect the electronic and optical properties of quantum dots (QDs), however, the exact mechanism of how STSs influence QDs remains unclear. Herein, we demonstrated the impact of STSs on electron transfer in CdSe QDs and triplet-triplet energy transfer (TTET) from CdSe to surface acceptor using femtosecond transient absorption spectroscopy. Three types of colloidal CdSe QDs, each containing various degrees of STSs as evidenced by photoluminescence and X-ray photoelectron spectroscopy, were employed. Time-resolved emission and transient absorption spectra revealed that STSs can suppress band-edge emission effectively, resulting in a remarkable decrease in the lifetime of photoelectrons in QDs from 17.1 ns to 4.9 ns. Moreover, the investigation of TTET process revealed that STSs can suppress the generation of triplet exciton and effectively inhibit band-edge emission, leading to a significant decrease in TTET from CdSe QDs to the surface acceptor. This work presented evidence for STSs influence in shaping the optoelectronic properties of QDs, making it a valuable point of reference for understanding and manipulating STSs in diverse QDs-based optoelectronic applications involving electron and energy transfer.
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