Boosting, probing and switching-off visible light-induced photocurrents in eumelanin-porous silicon hybrids
2015
Pinna, Andrea | Simbula, Fabrizio | Marongiu, Daniela | Pezzella, Alessandro | d'Ischia, Marco | Mula, Guido
A relatively intense photocurrent density up to 3.8 mA cm⁻² was induced by visible light in n⁺-doped porous silicon (n-PSi) coated with a eumelanin thin film produced by ammonia-induced solid state polymerization (AISSP) of 5,6-dihydroxyindole (DHI). The photocurrent was not affected by acetic acid vapors but was irreversibly abated by gaseous ammonia. No detectable photocurrent was observed using p⁺-PSi as the inorganic substrate. These results point to eumelanin as a powerful enhancer of PSi photoresponse to visible light via hole-type electrical conduction.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by National Agricultural Library
