open access

https://hdl.handle.net/2115/50248

Photoelectrochemical and Photoluminescence (PL) Properties of p-Type Porous Silicon/Electrolyte Solution Interface : Potential Dependent PL Spectra as a Result of Size Dependent Quenching

英語

1997-06-19

American Chemical Society

Journal of Physical Chemistry B

101(25)

4978-4981

Potential dependences of the photocurrent and visible photoluminescence (PL) from p-type porous silicon (p-PS) in 0.2 M Na2SO4 aqueous solution were investigated. When the potential became more negative than -0.6 V, a cathodic photocurrent was observed and PL was quenched. When the potential was swept back in the positive direction, the PL intensity increased, the photocurrent decreased, and both returned to the initial values. PL spectra measurements showed that the quenching of the PL intensity was accompanied by a blue shift of the peak wavelength as a result of the selective quenching of the red portion of the PL spectra. The experimentally observed results can be explained by considering the dependence of electron accumulation on the conduction band levels in PS layer, which is in turn related to the Si nanocrystalline size.

学術雑誌論文

Version of Record

1520-6106

1520-5207