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Researchers Discover that Copper Can Enhance OLED Performance
May 10, 2020
The Paul Scherrer Institute PSI, claims to have gained insights into a promising material for OLEDs. The substance enables high light yields and would be inexpensive to produce on a large scale—that means it is practically made for use in large-area room lighting. The study appeared in the journal Nature Communications. The compound is a yellowish solid that can be dissolved into a liquid or placed as a thin layer on an electrode and by applying an electric current, it gives off an intense green glow similar to standard small molecule material. The goal of current research is to find more efficient materials for cheaper and more environmentally friendly displays and large-area lighting. Here, inexpensive and readily available metals such as copper promise progress. Researching the copper-containing compound CuPCP; shows four copper atoms in the middle of each molecule, surrounded by carbon and phosphorus atoms. Copper is relatively inexpensive and the compound itself can be easily produced in large quantities
“We wanted to understand the excited state of the compound … and how the substance changes when it absorbs energy, said Grigory Smolentsev, a physicist in the operando spectroscopy research group. For example, does the structure of the molecule change? How is the charge distributed over the individual atoms after excitation? "This reveals how high the losses of energy that will not be released as light are likely to be," added Smolentsev, "and it shows us how we can possibly minimize these losses." Smolentsev and his collaborators took a closer look at the short-lived excited states of the copper compound. The measurements confirmed that the substance is a good candidate for OLEDs due to its chemical structure. The compound's quantum chemical properties make it possible to achieve a high light yield. One reason for this is that the molecule is relatively stiff, and its 3-D structure changes only slightly when excited. Now researchers can start to further optimize this substance for use in OLEDs.
What was missing from the report was any measure of performance in terms of color point, efficiency or lifetime. CuPCP has been explored before but has been found deficient in some performance measures
Figure 1: Yellow Light form CuPCP
May 10, 2020
The Paul Scherrer Institute PSI, claims to have gained insights into a promising material for OLEDs. The substance enables high light yields and would be inexpensive to produce on a large scale—that means it is practically made for use in large-area room lighting. The study appeared in the journal Nature Communications. The compound is a yellowish solid that can be dissolved into a liquid or placed as a thin layer on an electrode and by applying an electric current, it gives off an intense green glow similar to standard small molecule material. The goal of current research is to find more efficient materials for cheaper and more environmentally friendly displays and large-area lighting. Here, inexpensive and readily available metals such as copper promise progress. Researching the copper-containing compound CuPCP; shows four copper atoms in the middle of each molecule, surrounded by carbon and phosphorus atoms. Copper is relatively inexpensive and the compound itself can be easily produced in large quantities
“We wanted to understand the excited state of the compound … and how the substance changes when it absorbs energy, said Grigory Smolentsev, a physicist in the operando spectroscopy research group. For example, does the structure of the molecule change? How is the charge distributed over the individual atoms after excitation? "This reveals how high the losses of energy that will not be released as light are likely to be," added Smolentsev, "and it shows us how we can possibly minimize these losses." Smolentsev and his collaborators took a closer look at the short-lived excited states of the copper compound. The measurements confirmed that the substance is a good candidate for OLEDs due to its chemical structure. The compound's quantum chemical properties make it possible to achieve a high light yield. One reason for this is that the molecule is relatively stiff, and its 3-D structure changes only slightly when excited. Now researchers can start to further optimize this substance for use in OLEDs.
What was missing from the report was any measure of performance in terms of color point, efficiency or lifetime. CuPCP has been explored before but has been found deficient in some performance measures
Figure 1: Yellow Light form CuPCP
Source: Univer