Carrier transport in PbS nanocrystal conducting polymer composites

Journal article

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 ∼ 105 and the electron mobility increased by ∼ 107 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. © 2005 American Institute of Physics.

Authors: Watt, A; Eichmann, T; Rubinsztein-Dunlop, H; Meredith, P

• Publication status: Published
• Journal: APPLIED PHYSICS LETTERS
• Volume: 87
• Issue: 25
• Pages: 1-3
• Publication date: 2005-12-19
• DOI: 10.1063/1.2140885
• ISSN: 0003-6951
• Language: English