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0224U032929,
(0124U002941)
,
Development of highly efficient light-emitting nanostructures based on quantum wells for red and near-infrared organic light-emitting devices. (QUANT).
Створення червоних та інфрачервоних кванторозмірних гетероструктур
Stakhira Pavlo Yo., Доктор технічних наук
11-12-2024
Lviv Polytechnic National University
Development of highly efficient OLEDs based on quantum wells emitting light in the red and infrared spectral regions, as well as the study of physical features of radiative relaxation in low-dimensional 2D organic heterostructures formed on the basis of newly synthesized ambipolar emitters with organic barrier layers of commercially available wide-bandgap organic semiconductors.
This study performed the synthesis and comprehensive investigation of the thermal, electrochemical, and photophysical properties of newly synthesized compounds 3tCzPy, QBr2, QAcr2, and QPhox2. It was found that the emission in the 3tCzPy compound originates from the relaxation of hybridized local excited states and charge transfer states. This feature makes 3tCzPy a promising material for use as an emitter layer in quantum-sized organic light-emitting heterostructures. The emission spectrum of these heterostructures can be tuned by applying an external voltage. The compounds QBr2, QAcr2, and QPhox2 exhibit ambipolar conductivity. They demonstrate high hole and electron mobilities for organic semiconductors, reaching 3.2×10⁻⁴ cm²·V⁻¹·s⁻¹ and 1.5×10⁻⁴ cm²·V⁻¹·s⁻¹, respectively. These properties make them suitable candidates for functional wide-bandgap components in organic quantum wells. A review article submitted for publication analyzes the mechanisms of exciton localization in potential wells to maintain OLED efficiency. It highlights methods to enhance emission brightness and minimize exciton leakage channels. Additionally, the work discusses strategies for designing quantum wells for OLEDs with blue, green, red, near-infrared, and high-efficiency white light emission.
Bulavinets Tetiana O.
Deva Liliia R.
Kutsii Stepan A.
Fitio Volodymyr M.
Yaremchuk Iryna Ya.
2024-12-11
Updated: 2025-12-10
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