Cross-sectional SEM images of the photoanodes (a) without and (b) with the STN interlayer, respectively. (Inset: surface morphology of the STN layer only.)
Dark current-voltage curves of the DSSCs without and with the STN interlayer.
Typical curves of (a),(c) photocurrent transients and (b),(d) photovoltage transients for the DSSCs without and with the STN interlayer, respectively. The initial laser intensity gradually increased using the ND filters from bottom to top.
(a) Electron diffusion coefficients and (b) lifetimes in the photoanodes without and with the STN interlayer.
Photocurrent-voltage curves of the DSSCs without and with the 320 nm thick STN interlayer between the thick mesoporous layer and the TCO. Active area of the dye-adsorbed layer was for the samples under experimentation here, as carefully measured by the image analyzer.
Photovoltaic characteristics of the DSSCs without and with the STN interlayer between the TCO and mesoporous layer
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