ELECTRONIC-STRUCTURE AND PHOTOEXCITED-CARRIER DYNAMICS IN NANOMETER-SIZE CDSE CLUSTERS

被引:567
作者
BAWENDI, MG
WILSON, WL
ROTHBERG, L
CARROLL, PJ
JEDJU, TM
STEIGERWALD, ML
BRUS, LE
机构
关键词
D O I
10.1103/PhysRevLett.65.1623
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We use transient optical hole burning and photoluminescence to investigate the static and dynamic electronic properties of 32- CdSe quantum dots. We observe a number of discrete electronic transitions, resolve LO-phonon progressions, and obtain homogeneous linewidths and electroneLO-phonon couplings. We find that the band-gap luminescence is not from the exciton state, but from a surface trapped state. Rapid (1/4160 fs) trapping into these surface states results in long-lived (1/410e100 ns) bleach and induced-absorption features in pump-probe experiments. © 1990 The American Physical Society.
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页码:1623 / 1626
页数:4
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