Light absorption colloidal quantum dots is followed by some combination of relaxation to the quantum-confined bandedges; further relaxation to a Stokes-shifted level; and, potentially, by capture of charges to traps. Ensuing transport typically relies on thermal or field-induced reexictation to a transport level; which in turn leads to drift or diffusive motion, potentially followed by capture to rare deeper traps, recombination centres, or quantum traps. I will review the growing understanding of these processes; their implications for solar cell operation; and progress in minimizing carrier and energy loss in colloidal quantum dot photovoltaics.

Fate of photocarriers in colloidal quantum dot solids and solar cells

246th National Meeting (2013)

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