Carrier transport in PbS nanocrystal conducting polymer composites

Watt, Andrew, Eichmann, Troy, Rubinsztein-Dunlop, Halina and Meredith, Paul (2005) Carrier transport in PbS nanocrystal conducting polymer composites. Applied Physics Letters, 87 25: 253109-1-253109-3. doi:10.1063/1.2140885

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Author Watt, Andrew
Eichmann, Troy
Rubinsztein-Dunlop, Halina
Meredith, Paul
Title Carrier transport in PbS nanocrystal conducting polymer composites
Journal name Applied Physics Letters   Check publisher's open access policy
ISSN 0003-6951
Publication date 2005
Sub-type Article (original research)
DOI 10.1063/1.2140885
Open Access Status File (Publisher version)
Volume 87
Issue 25
Start page 253109-1
End page 253109-3
Total pages 3
Editor Nghi Q Lam
Place of publication Melville
Publisher American Institute of Physics
Collection year 2005
Language eng
Subject C1
240402 Quantum Optics and Lasers
780102 Physical sciences
Abstract In this letter we report the carrier mobilities in an inorganic nanocrystal: conducting polymer composite. The composite material in question (lead sulphide nanocrystals in the conducting polymer poly [2-methoxy-5-(2(')-ethyl-hexyloxy)-p-phenylene vinylene] (MEH-PPV) was made using a single-pot, surfactant-free synthesis. Mobilties were measured using time of flight techniques. We have found that the inclusion of PbS nanocrystals in MEH-PPV both balances and markedly increases the hole and electron mobilities-the hole mobility is increased by a factor of similar to 10(5) and the electron mobility increased by similar to 10(7) under an applied bias of 5 kV cm(-1). These results explain why dramatic improvements in electrical conductivity and photovoltaic performance are seen in devices fabricated from these composites.
Keyword Physics, Applied
Heterojunction Solar-cells
Charge-transport
Quantum Dots
Ppv
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 07:20:12 EST