TADF Dopant Materials
TADF dopant materials are organic molecules that efficiently convert triplet excitons into light by using small amounts of heat, enabling nearly 100% internal quantum efficiency without heavy metals. TADF dopants feature distinct donor-acceptor structures that facilitate a process called reverse intersystem crossing (RISC), allowing triplet energy to become singlet energy and emit light, a key breakthrough for high-performance displays
The donor-acceptor structure can create a small energy gap between singlet and triplet excited states, allowing triplet excitons to be thermally activated back to the singlet state to achieve near 100% internal quantum efficiency, rivalling phosphorescent materials, especially crucial for blue light.
TADF dopant materials include blue, green, yellow, orange, and red TADF emitters, and also high color purity MR-TADF emitters.
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Related categories: OLED materials, transport layer materials, OLED host materials, TADF materials
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Resources and Support
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 color 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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In this guide, we demonstrate how to make standard OLED devices in a glove box using materials and equipment easily available to any lab. Find out more.
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