Dopant Materials
Dopant materials play a crucial role in enhancing luminescence, colour purity, and energy transfer. These dopants are incorporated into the host material of the organic light emitting diode (OLED) or thermally activated delayed fluorescence (TADF) layers, improving the resultant devices performance, colour quality, and efficiency. Maximize your device efficiency further by fabricating and testing new devices in a glove box environment.
OLED dopant materials are often found as a central metal atom surrounded by organic ligands that control the energy levels and emission wavelength. These ligands can also be selected to enhance the solubility and processability within the host material.
TADF dopant materials feature donor-acceptor molecular structures that lead to energy differences in excited states, generating fluorescence via efficient reverse intersystem crossing. The structure and spatial arrangement of the donor and acceptor units play a key role. Respectively ensuring the LUMO and HUMO align well with the host material for efficient charge transport and effective charge separation and stabilisation.
Small amounts of these materials are able to introduce large changes in the performance and are thus critical tools in the design of light emitting devices. Explore our collection of blue, green, and red dopant materials for OLEDs and TADF devices.
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Related categories: OLED materials, transport layer materials, OLED host materials, TADF materials
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Resources and Support
Electroluminescence
Electroluminescence (EL) is the generation of light through the radiative recombination of holes and electrons which have been injected into the material from cathode and anode contacts. The charge carriers are injected into the material due to an applied bias over the cathode and anode. These cathode and anodes are orientated opposite each other.
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Fluorescence and Phosphorescence
Fluorescence and phosphorescence are types of photoluminescence. Photoluminescence refers to radiative emissions where the absorbance of a photon is followed by the emission of a lower energy photon. The main empirical difference between fluorescence and phosphorescence is the time in between absorbance and the emission of photons. Fluorescence is where a material absorbs a photon, and almost immediately emits a lower energy photon.
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Organic Light Emitting Diodes
Organic light emitting diodes are thin film devices that convert electrical energy into visible light. In OLED devices, electrons and holes are injected into the organic medium and recombine radiatively via electroluminescence (EL). The colour of the light emitted is dependent on the molecular structure of the organic material. This can be easily customized to make a wide range of wavelengths thanks to the endless configurations of organic molecules.
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OPV and OLED Fabrication Guide
Ossila’s pre-patterned ITO substrates are used for a wide variety of teaching and research devices (both organic and inorganic) where a high-quality ITO surface is required.
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Making OLEDs and OPVs: A Quickstart Guide
Organic photovoltaic cells (OPVs) or organic light emitting diodes (OLEDs) can be easily manufactured using Ossila's pre-patterned ITO substrates and a few simple spin coating and evaporating steps.
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