Efficient visible electroluminescence from highly porous silicon under cathodic bias
LT Canham, WY Leong, MIJ Beale, TI Cox… - Applied physics …, 1992 - pubs.aip.org
Visible electroluminescence (EL) has been obtained from porous silicon cathodically biased
in an aqueous electrolyte containing either the persulphate or the peroxide ion. EL
efficiencies of up to 0.1% have been obtained from porous silicon formed on both n-type and
p-type substrates for the application of only a few volts bias. In subdued lighting, the EL is
easily visible to the naked eye at excitation densities of 0.1 W cm-'. EL is obtained only from
porous silicon capable of giving photoluminescence (PL); the EL and PL spectra are broadly …
in an aqueous electrolyte containing either the persulphate or the peroxide ion. EL
efficiencies of up to 0.1% have been obtained from porous silicon formed on both n-type and
p-type substrates for the application of only a few volts bias. In subdued lighting, the EL is
easily visible to the naked eye at excitation densities of 0.1 W cm-'. EL is obtained only from
porous silicon capable of giving photoluminescence (PL); the EL and PL spectra are broadly …
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