Abstract
The electronic and optical properties of Eu3+‐doped CdS nanocrystals in reverse micelles have been investigated by optical absorption, photoluminescence (PL) and PL excitation (PLE) spectra. The PL intensity of f‐f transitions of Eu3+ exhibits an intriguing nanocrystal size dependence. On the analyses of the PLE spectra and the PL decay of Eu3+ f‐f transition emission, we have found that the excitation of Eu3+ ions is induced by energy transfer from optically excited CdS nanocrystals through their surface states, and follows the f‐f transition emissions.
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