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Host Materials

Fluorescent and phosphorescent host materials for organic light-emitting diodes (OLED) and thermally activated delayed fluorescence (TADF) devices. Maximize your device efficiency by fabricating and testing new devices in a glove box environment.

Host materials play a crucial role in the emissive layer in OLEDs. They assist in transporting electrons and holes efficiently and are therefore described as ambipolar. Host materials transfer energy to the light-emitting molecules/dopants and in some cases, a single molecule can serve as both the host and emitter. On top of this they can stabilize the charge carriers to promote longevity as well as efficiency.

Host materials can be placed into three categories:

  • Fluorescent Host Materials
  • Phosphorescent Host Materials
  • TADF Host Materials

Selecting the correct material type depends on selection the specific requirements of the device, such as color, efficiency, and operational stability. Please contact Ossila if you would like some advice.

Related categories: semiconducting molecules, transport layer materials, OLED dopant materials, TADF materials

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Resources and Support

Fluorescence and Phosphorescence 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.

organic light emitting diodes 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.

OPV and OLED Fabrication 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.

Making OLEDs and OPVs: A Quickstart Guide 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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