High Efficiency Carrier Multiplication in PbSe Nanocrystals: Implications for Solar Energy Conversion
High Efficiency Carrier Multiplication in PbSe Nanocrystals: Implications for Solar Energy Conversion
We demonstrate for the first time that impact ionization (II) (the inverse of Auger recombination) occurs with very high efficiency in semiconductor nanocrystals (NCs). Interband optical excitation of PbSe NCs at low pump intensities, for which less than one exciton is initially generated per NC on average, results in the …