Issue 111, 2015

Photoluminescence quenching and confinement effects in mesoporous silicon: photoluminescence, optical and electrical studies

Abstract

Chemical modifications including Ag nanoparticle deposition have been performed on electrochemically formed mesoporous silicon (PS) to optimize confinement and templating of molecular systems within PS as well as to modify the electronic properties of both the host and the guest. A complete quenching of photoluminescence (PL) of PS along with a considerable change of the optical properties of the dye rhodamine 6G (R6G) in PS has been achieved. For all states of preparation of the sample, PL, UV/vis transmission spectroscopy and electrical measurements were carried out. From our transmission and electrical measurements we concluded that the quenching of PL is attributed to a fundamental disruption of the luminescence mechanism. A blue shift in the PL peak of R6G in PS compared to bulk R6G is attributed to an efficient quantum confinement effect.

Graphical abstract: Photoluminescence quenching and confinement effects in mesoporous silicon: photoluminescence, optical and electrical studies

Article information

Article type
Paper
Submitted
24 Aug 2015
Accepted
19 Oct 2015
First published
19 Oct 2015

RSC Adv., 2015,5, 91134-91139

Photoluminescence quenching and confinement effects in mesoporous silicon: photoluminescence, optical and electrical studies

P. Kumar and P. Lemmens, RSC Adv., 2015, 5, 91134 DOI: 10.1039/C5RA17101F

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