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Magnetic field dependence of singlet oxygen generation by nanoporous silicon

Jamaree Amonkosolpan, Gazi N Aliev, Daniel Wolverson*, Paul A Snow and James John Davies

Author Affiliations

Department of Physics, University of Bath, Claverton Down, BA2 7AY Bath, UK

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Nanoscale Research Letters 2014, 9:342  doi:10.1186/1556-276X-9-342

Published: 9 July 2014


Energy transfer from photoexcited excitons localized in silicon nanoparticles to adsorbed oxygen molecules excites them to the reactive singlet spin state. This process has been studied experimentally as a function of nanoparticle size and applied external magnetic field as a test of the accepted understanding of this process in terms of the exchange coupling between the nano-Si exciton and the adsorbed O2 molecules.

Singlet oxygen; Photoluminescence; Energy transfer; Porous silicon