1：Experimental Design and Method Selection:

The study involved designing and synthesizing novel MR-TADF emitters (QAO and QAO-DAd) based on a fused amine/carbonyl system. Density functional theory (DFT) calculations were used to optimize ground state configurations and analyze frontier molecular orbitals. Transient photoluminescence decays and other spectroscopic methods were employed to confirm TADF characteristics. OLED devices were fabricated and evaluated for performance.

2：Sample Selection and Data Sources:

Samples included synthesized compounds QAO and QAO-DAd, purified by column chromatography and sublimation. Data were obtained from spectroscopic measurements, electrochemical analyses, and device testing.

3：List of Experimental Equipment and Materials:

Equipment included NMR spectrometer (Agilent DD2 600 MHz), mass spectrometer (Thermo ISQ), MALDI-TOF mass spectrometer (Bruker autoflex), thermal analysis instruments (TA SDT 2960, TA DSC 2010), UV-vis spectrometer (Perkin-Elmer Lambda 750), fluorescence spectrophotometer (Hitachi F-4600), transient fluorescence decay systems (Edinburgh Instruments FLS980, Hamamatsu C11367-03), PL quantum yield system (Hamamatsu C11347-11), voltammetric analyzer (CHI600), and device fabrication tools. Materials included organic compounds, solvents, and device layers such as ITO, HATCN, TAPC, TCTA, mCP, CBP, TmPyPB, Liq, Al, PEDOT:PSS.

4：Experimental Procedures and Operational Workflow:

Synthesis of QAO and QAO-DAd via literature methods and Buchwald-Hartwig amination. Purification and characterization using NMR, mass spectrometry, thermal analysis, UV-vis, fluorescence, phosphorescence, cyclic voltammetry, and transient PL decays. Fabrication of OLED devices via vacuum deposition or solution processing, with specific layer sequences and thicknesses. Measurement of device performance including current density-voltage-luminance, EL spectra, and efficiencies.

5：Data Analysis Methods:

DFT calculations at B3LYP/6-31G(d) level for molecular geometries and FMO distributions. Analysis of spectroscopic data to determine energy levels, ΔEST, and TADF properties. Calculation of device efficiencies from luminance, EL spectra, and current density.