Tags

Type your tag names separated by a space and hit enter

Suppressed Blinking under Normal Air Atmosphere in Toxic-Metal-Free, Small Sized, InP-Based Core/Alloy-Shell/Shell Quantum Dots.
J Phys Chem Lett 2019; 10(15):4330-4338JP

Abstract

Suppressed blinking has been reported in large (diameter ∼14.1 nm) core/shell InP quantum dots (QDs) under reduced air environment. We report here suppressed blinking with approximately four times smaller (diameter ∼3.6 nm) core/alloy-shell/shell InP QDs under ambient air atmosphere. The ⟨ON fraction⟩ has been obtained to be 0.65. Approximately 26% of the single QDs exhibit ON fraction >80%. The smaller ON exponent (1.19) magnitude in comparison to the OFF exponent (1.45) indicates longer ON events are interrupted by smaller OFF events. ON event truncation time is ∼1.5 times that of the OFF event, signifying the detrapping rate is much higher than the trapping rate. Interestingly, the detrapping rate/trapping rate (single-particle level property) could be directly correlated to the photoluminescence quantum yield (ensemble level property). An additional exponential term required to fit the probability density distribution of the ON event duration could be correlated with hole trapping, leading to extended ON times (>60 s).

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31294573

Citation

De, Chayan K., et al. "Suppressed Blinking Under Normal Air Atmosphere in Toxic-Metal-Free, Small Sized, InP-Based Core/Alloy-Shell/Shell Quantum Dots." The Journal of Physical Chemistry Letters, vol. 10, no. 15, 2019, pp. 4330-4338.
De CK, Roy D, Mandal S, et al. Suppressed Blinking under Normal Air Atmosphere in Toxic-Metal-Free, Small Sized, InP-Based Core/Alloy-Shell/Shell Quantum Dots. J Phys Chem Lett. 2019;10(15):4330-4338.
De, C. K., Roy, D., Mandal, S., & Mandal, P. K. (2019). Suppressed Blinking under Normal Air Atmosphere in Toxic-Metal-Free, Small Sized, InP-Based Core/Alloy-Shell/Shell Quantum Dots. The Journal of Physical Chemistry Letters, 10(15), pp. 4330-4338. doi:10.1021/acs.jpclett.9b01157.
De CK, et al. Suppressed Blinking Under Normal Air Atmosphere in Toxic-Metal-Free, Small Sized, InP-Based Core/Alloy-Shell/Shell Quantum Dots. J Phys Chem Lett. 2019 Aug 1;10(15):4330-4338. PubMed PMID: 31294573.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Suppressed Blinking under Normal Air Atmosphere in Toxic-Metal-Free, Small Sized, InP-Based Core/Alloy-Shell/Shell Quantum Dots. AU - De,Chayan K, AU - Roy,Debjit, AU - Mandal,Saptarshi, AU - Mandal,Prasun K, Y1 - 2019/07/19/ PY - 2019/7/12/pubmed PY - 2019/7/12/medline PY - 2019/7/12/entrez SP - 4330 EP - 4338 JF - The journal of physical chemistry letters JO - J Phys Chem Lett VL - 10 IS - 15 N2 - Suppressed blinking has been reported in large (diameter ∼14.1 nm) core/shell InP quantum dots (QDs) under reduced air environment. We report here suppressed blinking with approximately four times smaller (diameter ∼3.6 nm) core/alloy-shell/shell InP QDs under ambient air atmosphere. The ⟨ON fraction⟩ has been obtained to be 0.65. Approximately 26% of the single QDs exhibit ON fraction >80%. The smaller ON exponent (1.19) magnitude in comparison to the OFF exponent (1.45) indicates longer ON events are interrupted by smaller OFF events. ON event truncation time is ∼1.5 times that of the OFF event, signifying the detrapping rate is much higher than the trapping rate. Interestingly, the detrapping rate/trapping rate (single-particle level property) could be directly correlated to the photoluminescence quantum yield (ensemble level property). An additional exponential term required to fit the probability density distribution of the ON event duration could be correlated with hole trapping, leading to extended ON times (>60 s). SN - 1948-7185 UR - https://www.unboundmedicine.com/medline/citation/31294573/Suppressed_Blinking_Under_Normal_Air_Atmosphere_in_Toxic_Metal_Free,_Small_Sized,_InP_Based_Core/Alloy-Shell/Shell_Quantum_Dot L2 - https://dx.doi.org/10.1021/acs.jpclett.9b01157 DB - PRIME DP - Unbound Medicine ER -