| Autor: |
Jayaweera, P. V. V., Perera, A. G. U., Senevirathna, M. K. I., Pitigala, P. K. D. D. P., Tennakone, K. |
| Předmět: |
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| Zdroj: |
Applied Physics Letters; 12/6/2004, Vol. 85 Issue 23, p5754-5756, 3p, 2 Diagrams, 1 Chart, 2 Graphs |
| Abstrakt: |
Dye molecules bonded to a semiconductor surface could inject carriers to a band on photoexcitation. This process known as dye-sensitization is used for extending the sensitivity of silver halide emulsions. More recently, dye-sensitization has been adopted to devise solar cells. A near-infrared (NIR) sensitive heterojunction n-TiO2/D/p-CuSCN (where D denotes a NIR absorbing dye) is developed to examine the possibility of using dye-sensitization for IR detection. Although the responsivity is lower and response slow compared to silicon detectors, dye-sensitized detectors would be cost effective, especially for large area devices. They are operable at room temperature and have the advantage of insensitivity to noise induced by band-gap excitations (providing high specific detectivity of ∼1011). Furthermore, the spectral response can be adjusted by choosing the appropriate dye. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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