Accession Number:

AD1157575

Title:

Tuning Spectral and Temporal Response of UV-pumped Colloidal Quantum Dots Dispersed Within Additively-Manufactured Structures

Descriptive Note:

[Technical Report, Memorandum Report]

Corporate Author:

AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OHCenter for Integrated NanotechnologiesUNM Center for High Technology MaterialsLos Alamos National Laboratory

Personal Author(s):

• Sherburne, Michael
• Ivanov, Sergei
• Gharde, Shruti
• Alas, Gema
• Senthil, Arjun
• Bosomtwi, Dominic
• Withers, Nathan
• Osinski, Marek
• Burggraf, Larry
• Weber, Thomas
• Laurvick, Tod

Report Date:

2021-01-25

Pagination or Media Count:

14

Abstract:

Additive manufacturing is opening up new ways to make structures. Consequently, there are a growing areas of research in using additive manufacturing with nanomaterials. This paper investigates a novel fabrication technique which utilizes 3D printed honeycomb structures loaded with colloidal quantum dots through external dispersion and capped with SU-8-5 photoresist. Both the thickness of the 3D printed structure and the volume of colloidal quantum dots loaded into the aforementioned 3D printed structures affects both the photoluminescence spectra and photoluminescence lifetime decay of the overall sample. A charge transfer peak at 460 nm is observed in this process, which exhibits photoluminescence intensity tunability. It has been found that both the relative photoluminescence intensity at the charge transfer peak 0.197 to 0.874 and the photoluminescence lifetime decay at the colloidal quantum dots main peak of emission 15.5 ns-77.7 ns are tunable by tweaking the fabrication process. These findings pave the way for future optimization of this technique for sensing applications.

Descriptors:

Subject Categories:

• Printing and Graphic Arts
• Optics
• Quantum Theory and Relativity

Distribution Statement:

[A, Approved For Public Release]