Controlled Deposition and Spectroscopic Signatures of Ordered Multilayer Nanocrystal Assemblies for Optoelectronic Applications

of exciton decay in a controlled stratifi ed environment. This agreement attests to the viability of the sequential deposition technique to fabricate thick, designer NQD solids. In particular, our analysis of PL from multilayer structures indicates effi cient energy transfer (ET) from NQDs into the underlying Si substrate, which is important for hybrid ET-based photovoltaic devices. [ 16–18 ] Successful excitonic sensitization of crystalline Si via NRET or radiative (RET) energy transfer [ 19,20 ] may enable development of novel thin-fi lm hybrid solar cells. [ 18 ]