About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Solid-State Optical Materials and Luminescence Properties
|
| 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, but these nanoparticles are challenging to pattern. Here we show a roll-to-roll compatible, additive micropatterning method for CdSe NPLs that preserves the optical properties of the NPLs. CdSe NPL inks suspended in hexanes were synthesized using colloidal methods, and characterized via UV-Vis spectroscopy, steady-state and time-resolved photoluminescence, and transmission electron microscopy. We use a unique process to create micropatterns in Norland Optical Adhesive, using a combination of imprint lithography and transfer printing to create wettability contrast between the wells and lands. Additive deposition of the NPLs then infills only 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 at 5.0 mg/mL and 10.0 mg/mL, while 0.85 mm/s was better for 3.0 µm cells. |