TY - JOUR
T1 - Evidence for barrierless auger recombination in PbSe nanocrystals
T2 - A pressure-dependent study of transient optical absorption
AU - Pietryga, Jeffrey M.
AU - Zhuravlev, Kirill K.
AU - Whitehead, Michael
AU - Klimov, Victor I.
AU - Schaller, Richard D.
PY - 2008/11/18
Y1 - 2008/11/18
N2 - We report rates of Auger recombination (AR) in zero-dimensional (0D) PbSe nanocrystals as a function of energy gap (Eg) by using applied hydrostatic pressure to controllably shift Eg according to the bulk deformation potential. Our studies reveal that the rate of AR in nanocrystals is insensitive to energy gap, which is in contrast with bulk semiconductors where this rate shows exponential dependence on Eg. These measurements represent the first direct experimental evidence that AR in 0D nanomaterials is barrierless, in distinction from bulk semiconductors.
AB - We report rates of Auger recombination (AR) in zero-dimensional (0D) PbSe nanocrystals as a function of energy gap (Eg) by using applied hydrostatic pressure to controllably shift Eg according to the bulk deformation potential. Our studies reveal that the rate of AR in nanocrystals is insensitive to energy gap, which is in contrast with bulk semiconductors where this rate shows exponential dependence on Eg. These measurements represent the first direct experimental evidence that AR in 0D nanomaterials is barrierless, in distinction from bulk semiconductors.
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U2 - 10.1103/PhysRevLett.101.217401
DO - 10.1103/PhysRevLett.101.217401
M3 - Article
C2 - 19113449
AN - SCOPUS:56849105697
SN - 0031-9007
VL - 101
JO - Physical review letters
JF - Physical review letters
IS - 21
M1 - 217401
ER -