Long-lived quantum-confined infrared transitions in CdSe nanocrystals

D. S. Ginger; A. S. Dhoot; C. E. Finlayson; N. C. Greenham

doi:10.1063/1.1322369

Long-lived quantum-confined infrared transitions in CdSe nanocrystals

D. S. Ginger^*, A. S. Dhoot, C. E. Finlayson, N. C. Greenham

^*Awdur cyfatebol y gwaith hwn

Ffiseg

University of Cambridge

Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

Crynodeb

We present quasi-steady-state photoinduced absorption measurements on thin films of CdSe nanocrystals dispersed in a polystyrene matrix. For nanocrystals treated with pyridine we observe an intense, size-dependent absorption peaking in the mid-infrared when the samples are irradiated with visible light. This infrared absorption is associated with a size-dependent bleach in the visible, near the peak of the first excitonic absorption. We attribute the infrared absorption to an intraband electron transition in the quantum dots and measure the lifetime of the absorbing state to be 1.0 ms at 295 K.

Iaith wreiddiol	Saesneg
Tudalennau (o-i)	2816-2818
Nifer y tudalennau	3
Cyfnodolyn	Applied Physics Letters
Cyfrol	77
Rhif cyhoeddi	18
Dynodwyr Gwrthrych Digidol (DOIs)	https://doi.org/10.1063/1.1322369
Statws	Cyhoeddwyd - 30 Hyd 2000

Mynediad at Ddogfen

10.1063/1.1322369

Cysylltiad parhaol

Dolen barhaus

Ffeiliau eraill a chysylltiadau

Dolen i’r cyhoeddiad yn Scopus

Dyfynnu hyn

@article{a2ecb6889d7645c780252e000f621140,

title = "Long-lived quantum-confined infrared transitions in CdSe nanocrystals",

abstract = "We present quasi-steady-state photoinduced absorption measurements on thin films of CdSe nanocrystals dispersed in a polystyrene matrix. For nanocrystals treated with pyridine we observe an intense, size-dependent absorption peaking in the mid-infrared when the samples are irradiated with visible light. This infrared absorption is associated with a size-dependent bleach in the visible, near the peak of the first excitonic absorption. We attribute the infrared absorption to an intraband electron transition in the quantum dots and measure the lifetime of the absorbing state to be 1.0 ms at 295 K.",

author = "Ginger, {D. S.} and Dhoot, {A. S.} and Finlayson, {C. E.} and Greenham, {N. C.}",

year = "2000",

month = oct,

day = "30",

doi = "10.1063/1.1322369",

language = "English",

volume = "77",

pages = "2816--2818",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "18",

}

TY - JOUR

T1 - Long-lived quantum-confined infrared transitions in CdSe nanocrystals

AU - Ginger, D. S.

AU - Dhoot, A. S.

AU - Finlayson, C. E.

AU - Greenham, N. C.

PY - 2000/10/30

Y1 - 2000/10/30

N2 - We present quasi-steady-state photoinduced absorption measurements on thin films of CdSe nanocrystals dispersed in a polystyrene matrix. For nanocrystals treated with pyridine we observe an intense, size-dependent absorption peaking in the mid-infrared when the samples are irradiated with visible light. This infrared absorption is associated with a size-dependent bleach in the visible, near the peak of the first excitonic absorption. We attribute the infrared absorption to an intraband electron transition in the quantum dots and measure the lifetime of the absorbing state to be 1.0 ms at 295 K.

AB - We present quasi-steady-state photoinduced absorption measurements on thin films of CdSe nanocrystals dispersed in a polystyrene matrix. For nanocrystals treated with pyridine we observe an intense, size-dependent absorption peaking in the mid-infrared when the samples are irradiated with visible light. This infrared absorption is associated with a size-dependent bleach in the visible, near the peak of the first excitonic absorption. We attribute the infrared absorption to an intraband electron transition in the quantum dots and measure the lifetime of the absorbing state to be 1.0 ms at 295 K.

UR - http://www.scopus.com/inward/record.url?scp=0000720125&partnerID=8YFLogxK

U2 - 10.1063/1.1322369

DO - 10.1063/1.1322369

M3 - Article

AN - SCOPUS:0000720125

SN - 0003-6951

VL - 77

SP - 2816

EP - 2818

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 18

ER -

Long-lived quantum-confined infrared transitions in CdSe nanocrystals

Crynodeb

Mynediad at Ddogfen

Cysylltiad parhaol

Ffeiliau eraill a chysylltiadau

Ôl bys

Dyfynnu hyn