Synthesis and Luminescent Properties of Thermally Activated Delayed Fluorescence Materials Based on Quinoxaline Phenanthroline

Xiaoxue Xia; Dahao Wang; Yuanzhe Cao; Guo Yuan; Yingyuan Hu; Xin Zhao

doi:10.3788/AOS241314

Acta Optica Sinica, Volume. 45, Issue 1, 0116001(2025)

Synthesis and Luminescent Properties of Thermally Activated Delayed Fluorescence Materials Based on Quinoxaline Phenanthroline

Xiaoxue Xia¹, Dahao Wang¹, Yuanzhe Cao¹, Guo Yuan², Yingyuan Hu¹, and Xin Zhao^1、*

Author Affiliations

¹School of Chemistry and Life Sciences, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu , China

²Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, Jiangsu , China

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Figures & Tables(8)

Fig. 1. Synthetic routes of diTPA-DPPDC and diTPA-DPPDQ

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Fig. 2. Chemical structures and LUMO electronic cloud distributions of DPPZ、DPPZ-Ph-CN, and DPPZ-CN

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Fig. 3. Geometries, FMOs, energy levels, optical band gaps (E_g), and oscillator strengths of diTPA-DPPDC and diTPA-DPPDQ

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Fig. 4. Photophysical performance spectra of diTPA-DPPDC and diTPA-DPPDQ. (a) Normalized UV-visible absorption spectra and photoluminescence (PL) spectra in dilute toluene solution at room temperature; (b) fluorescence (Fl) and phosphorescence (Phos) spectra in dilute toluene solution at 77 K; Emission spectra of (c) diTPA-DPPDC and (d) diTPA-DPPDQ in different solvents at room temperature

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$Transient PL decay curves of diTPA-DPPDC and diTPA-DPPDQ doped films [15% (mass fraction) in CBP]$

Fig. 5. Transient PL decay curves of diTPA-DPPDC and diTPA-DPPDQ doped films [15% (mass fraction) in CBP]

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Fig. 6. CV curves of diTPA-DPPDC and diTPA-DPPDQ

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Fig. 7. TGA curves of diTPA-DPPDC and diTPA-DPPDQ

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Table 1. Summary of photoluminescence properties of diTPA-DPPDC and diTPA-DPPDQ
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Table 1. Summary of photoluminescence properties of diTPA-DPPDC and diTPA-DPPDQ
Material λ $_{a b s}^{a}$ /nm λ $_{F L}^{a}$ /nm λ $_{F L}^{b}$ /nm λ $_{P h}^{c}$ /nm E $_{g}^{d}$ /eV S $_{1}^{e}$ /eV T $_{1}^{f}$ /eV ΔE $_{S T}^{g}$ /eV Φ $_{P L}^{h}$ /%
diTPA-DPPDC 402/522 686 620 644 2.06 2.00 1.93 0.07 38.2
diTPA-DPPDQ 403/487 605 578 607 2.25 2.15 2.04 0.11 62.8

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Xiaoxue Xia, Dahao Wang, Yuanzhe Cao, Guo Yuan, Yingyuan Hu, Xin Zhao. Synthesis and Luminescent Properties of Thermally Activated Delayed Fluorescence Materials Based on Quinoxaline Phenanthroline[J]. Acta Optica Sinica, 2025, 45(1): 0116001

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