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Dye-sensitized near-infrared room-temperature photovoltaic photon detectors.
- Source :
-
Applied Physics Letters . 12/6/2004, Vol. 85 Issue 23, p5754-5756. 3p. 2 Diagrams, 1 Chart, 2 Graphs. - Publication Year :
- 2004
-
Abstract
- 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]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 85
- Issue :
- 23
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 15305353
- Full Text :
- https://doi.org/10.1063/1.1831562