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Excited‐State Dynamics of Pentacene Derivatives with Stable Radical Substituents |
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| Authors: | Dr Akitaka Ito Akihiro Shimizu Noriaki Kishida Yusuke Kawanaka Dr Daisuke Kosumi Prof?Dr Hideki Hashimoto Prof?Dr Yoshio Teki |
| Institution: | 1. Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka 558‐8585 (Japan);2. OCARINA, Osaka City University (Japan);3. Division of Mathematics and Physics, Osaka City University (Japan) |
| Abstract: | The excited‐state dynamics of pentacene derivatives with stable radical substituents were evaluated in detail through transient absorption measurements. The derivatives showed ultrafast formation of triplet excited state(s) in the pentacene moiety from a photoexcited singlet state through the contributions of enhanced intersystem crossing and singlet fission. Detailed kinetic analyses for the transient absorption data were conducted to quantify the excited‐state characteristics of the derivatives. |
| Keywords: | intersystem crossing pentacene derivatives radicals singlet fission time‐resolved spectroscopy |