메뉴 건너뛰기




Volumn 89, Issue 3, 2011, Pages 339-346

Investigation of ligand effects on exciton recombination in PbS nanoparticles

Author keywords

Exciton recombination; Multiple exciton generation; Nanoparticle ligand exchange; Surface modification of nanoparticles

Indexed keywords

ABSORBANCES; DECAY RATE; EXCITON RECOMBINATION; EXPERIMENTAL ERRORS; FEMTOSECOND TRANSIENT ABSORPTION SPECTROSCOPY; HIGHLY SENSITIVE; IONIC FUNCTIONALITY; LIGAND EFFECT; LIGAND SHELLS; MULTIEXCITONS; MULTIPLE EXCITON; NONRADIATIVE DECAYS; SURFACE MODIFICATION OF NANOPARTICLES; TRANSIENT ABSORPTION DATA;

EID: 79953247674     PISSN: 00084042     EISSN: None     Source Type: Journal    
DOI: 10.1139/V10-169     Document Type: Article
Times cited : (5)

References (32)
  • 1
    • 0344430057 scopus 로고    scopus 로고
    • (1), 10.1002/adma.200305395
    • Hines, M. A.; Scholes, G. D. Adv. Mater. 2003, 15 (21), 1844. 10.1002/adma.200305395
    • (2003) Adv. Mater. , vol.15 , Issue.21 , pp. 1844
    • Hines, M.A.1    Scholes, G.D.2
  • 5
    • 27844433243 scopus 로고    scopus 로고
    • Solution-processed infrared photovoltaic devices with >10% monochromatic internal quantum efficiency
    • DOI 10.1063/1.2135868, 213112
    • Maria, A.; Cyr, P. W.; Klem, E. J. D.; Levina, L.; Sargent, E. H. Appl. Phys. Lett. 2005, 87 (21), 213112. 10.1063/1.2135868 (Pubitemid 41643396)
    • (2005) Applied Physics Letters , vol.87 , Issue.21 , pp. 1-3
    • Maria, A.1    Cyr, P.W.2    Klem, E.J.D.3    Levina, L.4    Sargent, E.H.5
  • 7
    • 33846380266 scopus 로고    scopus 로고
    • Multiexciton generation by a single photon in nanocrystals
    • DOI 10.1021/nl062059v
    • Shabaev, A.; Efros, A. L.; Nozik, A. J. Nano Lett. 2006, 6 (12), 2856. 10.1021/nl062059v 17163719 (Pubitemid 46131341)
    • (2006) Nano Letters , vol.6 , Issue.12 , pp. 2856-2863
    • Shabaev, A.1    Efros, Al.L.2    Nozik, A.J.3
  • 10
    • 26944442344 scopus 로고    scopus 로고
    • Exciton multiplication and relaxation dynamics in quantum dots: Applications to ultrahigh-efficiency solar photon conversion
    • DOI 10.1021/ic0508425
    • Nozik, A. J. Inorg. Chem. 2005, 44 (20), 6893. 10.1021/ic0508425 16180844 (Pubitemid 41475960)
    • (2005) Inorganic Chemistry , vol.44 , Issue.20 , pp. 6893-6899
    • Nozik, A.J.1
  • 13
    • 2442669079 scopus 로고    scopus 로고
    • (13), 10.1021/ar020204f 15147173
    • El-Sayed, M. A. Acc. Chem. Res. 2004, 37 (5), 326. 10.1021/ar020204f 15147173
    • (2004) Acc. Chem. Res. , vol.37 , Issue.5 , pp. 326
    • El-Sayed, M.A.1
  • 15
    • 33748809508 scopus 로고    scopus 로고
    • Mechanisms for photogeneration and recombination of multiexcitons in semiconductor nanocrystals: Implications for lasing and solar energy conversion
    • DOI 10.1021/jp0615959
    • Klimov, V. I. J. Phys. Chem. B 2006, 110 (34), 16827. 10.1021/jp0615959 16927970 (Pubitemid 44412305)
    • (2006) Journal of Physical Chemistry B , vol.110 , Issue.34 , pp. 16827-16845
    • Klimov, V.I.1
  • 17
    • 36749069883 scopus 로고    scopus 로고
    • Carrier multiplication in InAs nanocrystal quantum dots with an onset defined by the energy conservation limit
    • DOI 10.1021/nl072046x
    • Schaller, R. D.; Pietryga, J. M.; Klimov, V. I. Nano Lett. 2007, 7 (11), 3469. 10.1021/nl072046x 17967043 (Pubitemid 350216047)
    • (2007) Nano Letters , vol.7 , Issue.11 , pp. 3469-3476
    • Schaller, R.D.1    Pietryga, J.M.2    Klimov, V.I.3
  • 19
    • 0000618304 scopus 로고    scopus 로고
    • (19), 10.1021/ar960178j
    • Zhang, J. Z. Acc. Chem. Res. 1997, 30 (10), 423. 10.1021/ar960178j
    • (1997) Acc. Chem. Res. , vol.30 , Issue.10 , pp. 423
    • Zhang, J.Z.1
  • 23
    • 34547995654 scopus 로고    scopus 로고
    • (23), 10.1103/PhysRevB.76.081304
    • Nair, G.; Bawendi, M. G. Phys. Rev. B 2007, 76 (8), 081304. 10.1103/PhysRevB.76.081304
    • (2007) Phys. Rev. B , vol.76 , Issue.8 , pp. 081304
    • Nair, G.1    Bawendi, M.G.2
  • 30
    • 79953243488 scopus 로고    scopus 로고
    • note
    • Whereas the PbS-OLA particles did not exhibit signs of photooxidation during the laser studies, it is possible they might have undergone oxidation prior to the laser studies and prior to ligand exchange. It is also possible that having pre-oxidized particles during the ligand exchange facilitates the oxidation of the ligand or prevents satisfactory passivation of the NPs, leading to the precipitation of the NPs. During the course of our investigation, it was reported by Klimov and co-workers 27 that oxidation of the NP core has a slight effect on MEG dynamics. In the same manner, if oligosulfide formation of the DMPS ligand occurs because of oxidation then a coordination site (or dangling bond) can open up on the surface of the particle. Both the oxidation of the NP core and the presence of dangling bonds can contribute to electron-trapping states on the NP surface. Correcting for a trapping factor in such a case provides a better assessment of true MEG yields.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.