Ultraviolet light selective photodiode based on an organic-inorganic heterostructure
Abstract
We show a perfect ultraviolet (UV) light selective and sensitive photovoltaic cell easily fabricated. The device consists of a water-soluble p-type semiconducting polymer PEDOT-PSS: poly(3,4-ethylenedioxythiophene) doped by poly(4-styrenesulfonate) film deposited on a Nb-doped titanium oxide (SrTiO3:Nb) substrate. For the PEDOT-PSS/SrTiO3:Nb heterostructure, the photosensitivity at zero bias for the UV light with L=1 mW/cm2 is estimated to be 0.05 A/W, corresponding to a quantum yield of 16% electron/photon. This device is only activated in the UV region (λ<390 nm), and then, it exhibits a large response to the UV-B light (290-320 nm).
- Publication:
-
Applied Physics Letters
- Pub Date:
- September 2003
- DOI:
- 10.1063/1.1610793
- Bibcode:
- 2003ApPhL..83.2097Y
- Keywords:
-
- 85.60.Dw;
- Photodiodes;
- phototransistors;
- photoresistors