1：Experimental Design and Method Selection:

The study involved steady-state and time-resolved spectroscopies to investigate photoluminescence quenching and decay dynamics. Electrochemical characterization (cyclic voltammetry and differential pulse voltammetry) was used to assess redox potentials. Solid-state dye-sensitized solar cells (ssDSSCs) were fabricated and characterized to test the hypothesis of excited-state electron transfer.

2：Sample Selection and Data Sources:

Samples included TiO2 and ZrO2 films sensitized with LEG4 or MKA253 dyes, with spin-coated [Ru(bpy)3(PF6)2] layers. Data were obtained from spectroscopic measurements, electrochemical analyses, and photovoltaic device testing.

3：List of Experimental Equipment and Materials:

Equipment included UV-visible spectrophotometer (Cary 300), fluorescence spectrophotometer (Cary Eclipse), time-resolved photoluminescence setup (with Nd:YAG laser, oscilloscope, PMT, monochromator), potentiostat (Ivium Technologies vertex), profilometer (Veeco Dektak 150), solar simulator (Newport Model 91160), and thermal evaporation system (Leica EM MED020). Materials included [Ru(bpy)3(PF6)2] from Sigma-Aldrich, LEG4 and MKA253 dyes from Dyenamo AB, FTO glass substrates from Pilkington, TiO2 paste (Dyesol 18NR-T), ZrO2 paste (Solaronix ZT-SP), and other chemicals like acetonitrile, ethanol, and Ag for electrodes.

4：0). Materials included [Ru(bpy)3(PF6)2] from Sigma-Aldrich, LEG4 and MKA253 dyes from Dyenamo AB, FTO glass substrates from Pilkington, TiO2 paste (Dyesol 18NR-T), ZrO2 paste (Solaronix ZT-SP), and other chemicals like acetonitrile, ethanol, and Ag for electrodes. Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: Films were prepared by spin-coating TiO2 or ZrO2 pastes on substrates, sintering, sensitizing with dyes, and spin-coating [Ru(bpy)3(PF6)2]. Spectroscopic measurements were performed with excitation at specific wavelengths. Electrochemical measurements used a three-electrode cell. ssDSSCs were fabricated with Ag contacts and characterized under simulated sunlight.

5：2]. Spectroscopic measurements were performed with excitation at specific wavelengths. Electrochemical measurements used a three-electrode cell. ssDSSCs were fabricated with Ag contacts and characterized under simulated sunlight. Data Analysis Methods:

5. Data Analysis Methods: Data were analyzed using Stern-Volmer plots for quenching, multiexponential fitting for time-resolved decays, and standard photovoltaic parameters (Jsc, Voc, FF, efficiency) for device performance. Software included LabView for time-resolved measurements.