@article{oai:tsukuba.repo.nii.ac.jp:00036114,
 author = {池沢, 道男 and 舛本, 泰章 and Sun, Jianhui and Ikezawa, Michio and Wang, Xiuying and Jing, Pengtao and Li, Haibo and Zhao, Jialong and Masumoto, Yasuaki},
 issue = {18},
 journal = {Physical chemistry, chemical physics : PCCP},
 month = {May},
 note = {Photocarrier recombination dynamics in ternary chalcogenide CuInS2 quantum dots (CIS QDs) was studied by means of femtosecond transient-absorption (TA) and nanosecond time-resolved photoluminescence (PL) spectroscopy. Under strong excitation, the TA dynamics in CIS QDs is well described by a simple rate equation including single-carrier trapping, free-to-bound recombination, and trap-assisted Auger recombination. Under weak excitation, on the other hand, the PL decays of the QDs are composed of a short-lived component caused by surface trapping and a long-lived one caused by free-to-bound recombination. It is found that the surface trapping accelerates markedly with decreasing QD size while the free-to-bound radiative recombination hardly depends on the QD size. Besides this, we observed both a decrease in the PL lifetimes and a dynamic spectral redshift, which are attributed to the surface trapping and the coexistent inhomogeneous broadening in CIS QDs. The spectral redshift becomes less pronounced in CIS/ZnS core/shell QDs because of the suppression of the fast nonradiative recombination caused by the passivation of the surface traps. These results give clear evidence that the free-to-bound model is appropriate for interpreting the optical properties of CIS QDs.},
 pages = {11981--11989},
 title = {Photocarrier recombination dynamics in ternary chalcogenide CuInS2 quantum dots},
 volume = {17},
 year = {2015}
}