Directed Self-Assembly of Colloidal Quantum Dots Using
Well-Ordered Nanoporous Templates for Three-Colored Nanopixel Light-Emitting
Diodes
Posted on 2019-08-06 - 20:43
We demonstrate high-resolution
light-emitting diodes based on well-defined
nanoarrays of colloidal quantum dots (QDs) with different sizes in
a large area using nanoporous templates. To fabricate the nanoporous
templates, a thin film of asymmetric polystyrene-block-poly(2-vinylpyridine) copolymers (S2VPs) is spin-coated on a ZnO
layer and solvent-annealed in a vapor of toluene to induce vertically
oriented P2VP cylinders in a PS matrix. When immersed in ethanol,
the surface of BCP thin films is reconstructed and well-ordered nanopores
are generated over the whole surface. The nanopores are then directly
utilized as templates for self-assembly of quantum dots during the
spin-coating process. Consequently, the quantum dots of three primary
colors are selectively deposited in nanopores and are used to fabricate
a well-ordered array of nanometer-scale pixels that can be operated
by applying the proper voltage for each color.
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Kim, Jinwoong; Hwang, Gyeong Seok; Lee, Dong-Eun; Ahn, Jaewoo; Hwang, Cheong-Soo; Chin, Byung Doo; et al. (2019). Directed Self-Assembly of Colloidal Quantum Dots Using
Well-Ordered Nanoporous Templates for Three-Colored Nanopixel Light-Emitting
Diodes. ACS Publications. Collection. https://doi.org/10.1021/acsaelm.9b00341