Thermally activated delayed fluorescence (TADF) of C and C was observed up to 140 °C in a -butyldihomooxacalix[4]arene solid matrix, a temperature range significantly higher than that of previous TADF quantitative studies. An effective singlet-triplet energy gap of 29 kJ/mol and triplet formation quantum yields of 0.97 and 0.99 were measured for C and C, respectively. The photophysical properties of the two fullerenes in this new matrix are comparable to those obtained in polystyrene at a lower temperature range. Calixarenes are proposed to be suitable matrices for high temperature TADF studies and applications.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6017425 | PMC |
| http://dx.doi.org/10.3390/molecules23030558 | DOI Listing |
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