EviDots

Lead Sulfide (PbS) Evidot® Quantum Dots

Lead Sulfide (PbS) EviDot® quantum dots are now available online with emissions spanning into the Near Infrared Region (NIR) of the spectrum. These quantum dots are well-suited for a rapidly expanding number of NIR applications. PbS EviDots are available in wavelengths from 850nanometers (nm) to 1500nm. Order below or complete the form to request more information.

Order PbS EviDots®

PbS Core Quantum Dot Product Availability
Emission λ Peak Tolerance Material Type Part Number Price
850nm +/- 50nm PbS Core ED-P20-TOL-0850 50 mg - $469
200 mg - $749
500 mg - $1249
1000 mg - $1699
1100 ED-P20-TOL-1100
1500 ED-P20-TOL-1500

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PbS EviDot® (850nm - 1500nm)Specifications

PbS EviDots
Description: Core Quantum dots
Recommended Excitation [nm] <650
Emission Peak Tolerance [nm] +/-50
Composition: PbS core quantum dots
Solvent: Toluene
Storage: Sealed container, keep in dark, 4ºC, do not freeze
Shelf Life: 6 Months unopened
Quantum Dot Material System Type Emission Peak [nm] Typical FWHM [nm] 1st Exciton Peak [nm-nominal] Crystal Diameter1 [nm-approx] Molar
Extinction
Coefficient		 Molecular Weight3 [µg/nmol]
PbS Core 850 <150 700 2.2 2.0E+04 40
1100 1000 3.2 6.0E+04 82
1500 1450 5.3 1.0E+05 430


Notes on Quantum Dot Properties

  1. Estimates based upon Yu, Qu, Guo, Peng, February 20, 2003. Includes core/shell diameter only. For total diameter add approximately 4nm for ligands
  2. Measured at first exciton peak, units expressed in L x (mol x cm)-1.
  3. Molecular weight for core material including weight from shell and ligands.
  4. Quantum yields were measured using a Varian spectrofluorometer. Fluorescein dye was used on 490 and 520nm EviDots. Rhodamine 6G was used for all other wavelengths. Batch to batch variability quantum yields occurs.

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