期刊
EPL
卷 79, 期 3, 页码 -出版社
EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
DOI: 10.1209/0295-5075/79/37002
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The excitonic. ne structure of silicon nanoparticles is investigated by time- resolved and magnetic-.eld-dependent photoluminescence. The results are analyzed using the common model of an excitonic. ne structure consisting of a bright and a dark exciton. We. nd that the radiative recombination rates of both excitons di. er only by a factor of eight. Therefore, we observe a thermal crossover in the character of the emission from bright- exciton- like to dark- exciton- like. The validity of our model is further supported by magnetic-. eld - dependent measurements, in which e. ects of state mixing are observed.
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