Abstract
Multiple exciton generation and subsequent electrical extraction from a thin film photoconductive device constructed from PbSe nanocrystal quantum dots are demonstrated. The hydrazine treatment of the PbSe film drastically improves the conductivity of the film while maintaining excellent optical and structural film quality. The effects of multiple exciton generation and electrical extraction (electrons collected per photon absorbed) were quantified as a function of incident photon energy from 1.55 to 3.1 eV. The multiple carrier extraction (>100%) was observed at photon energies greater than 2.8 times of the quantum dot bandgap with ∼210% measured at 4.4 times the bandgap.
| Original language | English |
|---|---|
| Article number | 031107 |
| Journal | Applied Physics Letters |
| Volume | 92 |
| Issue number | 3 |
| DOIs | |
| State | Published - Feb 1 2008 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
Cite this
Multiple exciton generation and electrical extraction from a PbSe quantum dot photoconductor. / Kim, Sung Jin; Kim, Won Jin; Sahoo, Yudhisthira; Cartwright, Alexander N.; Prasad, Paras N.
In: Applied Physics Letters, Vol. 92, No. 3, 031107, 01.02.2008.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Multiple exciton generation and electrical extraction from a PbSe quantum dot photoconductor
AU - Kim, Sung Jin
AU - Kim, Won Jin
AU - Sahoo, Yudhisthira
AU - Cartwright, Alexander N.
AU - Prasad, Paras N.
PY - 2008/2/1
Y1 - 2008/2/1
N2 - Multiple exciton generation and subsequent electrical extraction from a thin film photoconductive device constructed from PbSe nanocrystal quantum dots are demonstrated. The hydrazine treatment of the PbSe film drastically improves the conductivity of the film while maintaining excellent optical and structural film quality. The effects of multiple exciton generation and electrical extraction (electrons collected per photon absorbed) were quantified as a function of incident photon energy from 1.55 to 3.1 eV. The multiple carrier extraction (>100%) was observed at photon energies greater than 2.8 times of the quantum dot bandgap with ∼210% measured at 4.4 times the bandgap.
AB - Multiple exciton generation and subsequent electrical extraction from a thin film photoconductive device constructed from PbSe nanocrystal quantum dots are demonstrated. The hydrazine treatment of the PbSe film drastically improves the conductivity of the film while maintaining excellent optical and structural film quality. The effects of multiple exciton generation and electrical extraction (electrons collected per photon absorbed) were quantified as a function of incident photon energy from 1.55 to 3.1 eV. The multiple carrier extraction (>100%) was observed at photon energies greater than 2.8 times of the quantum dot bandgap with ∼210% measured at 4.4 times the bandgap.
UR - http://www.scopus.com/inward/record.url?scp=38549158400&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=38549158400&partnerID=8YFLogxK
U2 - 10.1063/1.2835920
DO - 10.1063/1.2835920
M3 - Article
AN - SCOPUS:38549158400
VL - 92
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 3
M1 - 031107
ER -