| Autor: |
Yu Kusakabe, Katsuyuki Shizu, Hiroyuki Tanaka, Kazuo Tanaka, Hironori Kaji |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Applied Physics Express, Vol 17, Iss 6, p 061001 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
1882-0786 |
| DOI: |
10.35848/1882-0786/ad4e96 |
| Popis: |
The characteristic of inverted singlet-triplet excited states, in which the lowest singlet excited state (S _1 ) is lower than the lowest triplet state (T _1 ) in energy, was observed in a dialkylamine-substituted pentaazaphenalene derivative, 5AP-N(C12) _2 . The transient photoluminescence measurements showed that the reverse intersystem crossing has virtually zero activation energy, whereas the intersystem crossing is proceeded by a thermal activation process. T _1 was located energetically above S _1 with a negative energy gap between S _1 and T _1 (Δ E _ST ) of −37 meV. Fluorescence and phosphorescence spectra also confirmed the negative Δ E _ST of −46 to −32 meV. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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