About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Printed Electronics and Additive Manufacturing of Advanced Functional Materials and Devices—From Processing Concepts to Applications
|
| Presentation Title |
Large Area Micropatterning of CdSe Nanoplatelets |
| Author(s) |
Hagmar Tinoco Madeira, Maya Ramamurthy, Yidenekachew J. Donie, Vivian E. Ferry |
| On-Site Speaker (Planned) |
Hagmar Tinoco Madeira |
| Abstract Scope |
Semiconductor nanoplatelets (NPLs) are increasingly popular for optoelectronic applications due to their narrow luminescence and anisotropic shape, yet they are challenging to pattern. Here we show a roll-to-roll compatible, additive micropatterning method for CdSe NPLs, preserving their optical properties. Colloidal CdSe NPL inks suspended in hexanes were synthesized, and characterized via UV-Vis spectroscopy, steady-state and time-resolved photoluminescence (PL), and transmission electron microscopy. Using a unique process to create micropatterns in Norland Optical Adhesive, we combine imprint lithography and transfer printing, creating wettability contrast between the wells and lands with selective infilling of the wells. Varying ink concentrations and dragging speeds optimized infilling for 3.0 µm and 1.5 µm microcells, finding that 0.7 mm/s was optimal for 1.5 µm cells, while 0.85 mm/s was better for 3.0 µm cells at 5.0 mg/mL and 10.0 mg/mL. The patterned arrays exhibited a PL maximum at 512 nm, with a lifetime of 0.96 ns. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nanotechnology, Electronic Materials, Additive Manufacturing |