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Thermally activated delayed fluorescence (TADF) is a process through which a molecular species in a non-emitting excited state can incorporate surrounding thermal energy to change states and only then undergo light emission. The TADF process involves an excited molecular species in a triplet state, which commonly has a forbidden transition to the ground state termed phosphorescence. By absorbing nearby thermal energy the triplet state can undergo reverse intersystem crossing (RISC) converting it to a singlet state, which can then de-excite to the ground state and emit light in a process termed fluorescence. Along with fluorescent and phosphorescent compounds, TADF compounds are one of the three main light-emitting materials used in organic light-emitting diodes (OLEDs).

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  • 熱活性化遅延蛍光 (ja)
  • Thermally activated delayed fluorescence (en)
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  • 熱活性化遅延蛍光(ねつかっせいかちえんけいこう、英: Thermally activated delayed fluorescence、略称: TADF)は、非発光励起状態にある分子種が状態を変化させるために周囲の熱エネルギーを取り込むことができ、それでようやく発光を遂げる過程である。TADF過程には三重項状態にある励起分子種が関与する。この分子種は通常はリン光と呼ばれる基底状態への禁制遷移を持つ。近くの熱エネルギーを吸収することによって、三重項状態は自身を一重項状態に変換する逆項間交差(RISC)を経験することができる。一重項状態は基底状態へと脱励起し、蛍光と呼ばれる過程で発光する。蛍光化合物および燐光化合物と並んで、TADF化合物は有機発光ダイオード(OLED)で使われ3つの主要な発光材料の1つである。 別の種類のTADF過程はへの配座的捕獲によって生じることが示されている。熱エネルギーは、遅延蛍光をもたらす発光状態の再集合化を可能にする。 (ja)
  • Thermally activated delayed fluorescence (TADF) is a process through which a molecular species in a non-emitting excited state can incorporate surrounding thermal energy to change states and only then undergo light emission. The TADF process involves an excited molecular species in a triplet state, which commonly has a forbidden transition to the ground state termed phosphorescence. By absorbing nearby thermal energy the triplet state can undergo reverse intersystem crossing (RISC) converting it to a singlet state, which can then de-excite to the ground state and emit light in a process termed fluorescence. Along with fluorescent and phosphorescent compounds, TADF compounds are one of the three main light-emitting materials used in organic light-emitting diodes (OLEDs). (en)
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  • Thermally activated delayed fluorescence (TADF) is a process through which a molecular species in a non-emitting excited state can incorporate surrounding thermal energy to change states and only then undergo light emission. The TADF process involves an excited molecular species in a triplet state, which commonly has a forbidden transition to the ground state termed phosphorescence. By absorbing nearby thermal energy the triplet state can undergo reverse intersystem crossing (RISC) converting it to a singlet state, which can then de-excite to the ground state and emit light in a process termed fluorescence. Along with fluorescent and phosphorescent compounds, TADF compounds are one of the three main light-emitting materials used in organic light-emitting diodes (OLEDs). Another type of TADF process has been shown to originate from conformational trapping to a dark state. Thermal energy allows the repopulation of the emissive state resulting in a delayed fluorescence. (en)
  • 熱活性化遅延蛍光(ねつかっせいかちえんけいこう、英: Thermally activated delayed fluorescence、略称: TADF)は、非発光励起状態にある分子種が状態を変化させるために周囲の熱エネルギーを取り込むことができ、それでようやく発光を遂げる過程である。TADF過程には三重項状態にある励起分子種が関与する。この分子種は通常はリン光と呼ばれる基底状態への禁制遷移を持つ。近くの熱エネルギーを吸収することによって、三重項状態は自身を一重項状態に変換する逆項間交差(RISC)を経験することができる。一重項状態は基底状態へと脱励起し、蛍光と呼ばれる過程で発光する。蛍光化合物および燐光化合物と並んで、TADF化合物は有機発光ダイオード(OLED)で使われ3つの主要な発光材料の1つである。 別の種類のTADF過程はへの配座的捕獲によって生じることが示されている。熱エネルギーは、遅延蛍光をもたらす発光状態の再集合化を可能にする。 (ja)
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