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- W3207224963 abstract "Photoanodes based on titanium dioxide (TiO<sub>2</sub>) are ubiquitous in various molecular devices for solar energy conversion and storage.[1] Lanthanide doping of TiO<sub>2</sub> (LTO) is among the most explored materials with tremendous potential towards efficient charge transport mesoporous layer as well as improving the photocatalytic activity in both solar cell and solar fuel devices.[2, 3] In this work, presented a comprehensive investigation of improved performance of Samarium (Sm<sup>3+</sup>)-doped TiO<sub>2</sub> based dye-sensitized solar cells (DSSC) and Photo-electrochemical (PEC) devices and established the optimum Sm<sup>3+</sup> doping of TiO<sub>2</sub> by characterizing the different Sm<sup>3+</sup>concentrations (0.1-0.5 mol%). Various techniques, namely, X-ray diffraction (XRD), scanning electron microscope (SEM), UV-VIS absorption spectroscopy, are employed for an all-inclusive characterization of the prepared Sm-TiO2 samples. The dielectric measurements on Sm-TiO<sup>2</sup> pellets established the best electrical conductivity exhibited by Sm (0.4%)-TiO<sup>2</sup>. Synthesis protocols are followed based on earlier work.[3] The photoanodes based on prepared Sm-TiO<sub>2</sub> are deposited on FTO substrates and are used to fabricate DSSC and PEC devices. Commercial N719 dye-based DSSC devices are fabricated and tested. Devices with Sm(0.3%)-TiO<sub>2</sub> exhibited power conversion efficiency (η) ≈ 6.4%, which is almost 100% improvement on devices with undoped-TiO<sup>2</sup> that exhibited η: 3.4% as shown in Figure 1. Time-resolved PL-quenching measurements evidenced better electron-injection at dye/Sm (0.3%)-TiO<sub>2</sub> interface. Similarly, PEC devices presented higher current density at 1.2 V vs RHE potential for Sm (0.3%)- TiO<sub>2</sub>. This enhancement corroborates the EIS measurements presenting lower charge transfer resistance values for devices with Sm (0.3%)-TiO<sub>2</sub>." @default.
- W3207224963 created "2021-10-25" @default.
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- W3207224963 date "2021-10-09" @default.
- W3207224963 modified "2023-09-23" @default.
- W3207224963 title "Samarium-doped TiO2 photoanodes for the molecular devices for solar energy conversion" @default.
- W3207224963 doi "https://doi.org/10.1117/12.2602675" @default.
- W3207224963 hasPublicationYear "2021" @default.
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