| |
[摘要]：Fe(3)O(4) magnetic nanoparticles (mean size of about 10 nm) capped by surfactant oleic acid (OA) were incorporated into P3HT:PCBM BHJ-PSCs by doping in the P3HT:PCBM photoactive layer for the first time. The PCE of the OA-Fe(3)O(4):P3HT:PCBM BHJ-PSC device is enhanced by similar to 18% at the optimum OA-Fe(3)O(4) NPs doping ratio of 1%. The role of the magnetic property of Fe(3)O(4) NPs on the PCE of OA-Fe(3)O(4):P3HT:PCBM devices was studied, confirming the exclusive contribution of the Fe(3)O(4) NPs to the observed enhancement of PCE. The enhancement of the PCE of the OA-Fe(3)O(4):P3HT:PCBM BHJ-PSC device is found to be primarily due to the increase of short-circuit current (J(sc)) by similar to 14%, which is attributed to the magnetic field effect originated from the superparamagnetism of Fe(3)O(4) NPs, resulting in the increase of the population of triplet excitons. Finally, the effect of Fe(3)O(4) NPs on the enhancement of PCE of OA-Fe(3)O(4):P3HT:PCBM device is further investigated by comparing different means of doping in P3HT:PCBM or PEDOT:PSS layer, confirming that such an effect can be achieved only when Fe(3)O(4) NPs are doped in the P3HT:PCBM photoactive layer. (C) 2011 Elsevier B.V. All rights reserved. |
|
