We demonstrate electronic energy transfer between close packed quantum
dots using cw and time resolved photoluminescence. Optically clear an
d thin, close packed quantum dot solids were prepared from mixtures of
small and large CdSe quantum dots (38.5 and 62 Angstrom, sigma < 4.5%
). Quenching of the luminescence (lifetime) of the small dots accompan
ied by enhancement of the luminescence (lifetime) of the large dots is
consistent with long-range resonance transfer of electronic excitatio
ns from the more electronically confined states of the small dots to t
he higher excited states of the large dots.