Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.9/1746
Título: Dye-sensitized 1D anatase TiO2 nanorods for tunable efficient photodetection in the visible range
Autor: Parreira, P.
Torres, Erica
Nunes, Clarisse
Carvalho, C. Nunes de
Lavareda, G.
Amaral, A.
Brites, Maria João
Palavras-chave: Photodetectors
Visible range
Optical spectral selectivity
Data: 2012
Editora: Elsevier
Citação: Parreira, P.; Torres, E.; Nunes, C.; Carvalho, C.N.; Lavareda, G.; Amaral, A.; Brites, M.J. - Dye-sensitized 1D anatase TiO2 nanorods for tunable efficient photodetection in the visible range. In: Sensors and Actuators B: Chemical, 2012, vol. 161, nº 1, p. 901-907
Resumo: TiO2 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's response to radiation pulses. The practical breakthrough is the use of different dyes according to the region of the electromagnetic spectrum one wants to detect. Devices with photocurrent 6 orders of magnitude higher than the dark current (from ∼2 × 10−12 to 2 × 10−6 A for a 100 V bias) were fabricated with a spectral response within the visible range of the electromagnetic spectrum. In addition, this approach is likely to allow for the fabrication of hybrid photodetectors on cheap heat sensible flexible polymeric substrates.
URI: http://hdl.handle.net/10400.9/1746
ISSN: 0925-4005
Versão do Editor: http://dx.doi.org/10.1016/j.snb.2011.11.059
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