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Dye-sensitized 1D anatase TiO2 nanorods for tunable efficient photodetection in...
Parreira, P.; Torres, Erica; Nunes, Clarisse; Carvalho, C. Nunes de; Lavareda, G.; Amaral, A.; Brites, Maria JoãoTiO2 films with enhanced photosensitivity were deposited on alkali free glass substrates without intentional substrate heating by pulsed DC magnetron reactive sputtering with an average thickness of about 2 μm. Three dyes, commercial N719 and two new organic dyes were impregnated in order to control the optical spectral selectivity of such films. The type of dye used proved to dramatically influence the device'...
Positron annihilation and constant photocurrent method measurements on a-Si:H f...
Gordo, P. M.; Marques, M. F. Ferreira; Gil, C. Lopes; Lima, A. P. de; Lavareda, G.; Carvalho, C. Nunes de; Amaral, A.; Kajcsos, Zs.Defect structure of hydrogenated amorphous silicon thin-films was studied by positron annihilation spectroscopy (PAS), whereas the density of states below the Fermi level was measured by constant photocurrent method (CPM). Divacancies and large vacancy clusters were identified as the main defects present in these films, with relative concentrations strongly dependent on the rf-power. Correlation between PAS, CP...
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