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Issue 70, 2015
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Boosting, probing and switching-off visible light-induced photocurrents in eumelanin-porous silicon hybrids

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Abstract

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.

Graphical abstract: Boosting, probing and switching-off visible light-induced photocurrents in eumelanin-porous silicon hybrids

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Publication details

The article was received on 08 May 2015, accepted on 19 Jun 2015 and first published on 19 Jun 2015


Article type: Paper
DOI: 10.1039/C5RA08605A
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Citation: RSC Adv., 2015,5, 56704-56710
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    Boosting, probing and switching-off visible light-induced photocurrents in eumelanin-porous silicon hybrids

    A. Pinna, F. Simbula, D. Marongiu, A. Pezzella, M. d'Ischia and G. Mula, RSC Adv., 2015, 5, 56704
    DOI: 10.1039/C5RA08605A

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