Physical effects of DCNQI derivatives doping as an N type organic semiconductor in organic photovoltaic cell performance.
In the previous work, we have reported that organic photovoltaic (OPV) cells using DMDCNQI as an n-type second dopant material showed a high power conversion efficiency (PCE). In the present work, we have synthesized a novel DHDCNQI with long alkyl chains to improve the compatibility between the DHDCNQI dopant molecule and host P3HT polymer. We have fabricated OPV cells consisting of ITO/PEDOT:PSS/P3HT:PCBM:DHDCNQI/Al. We have investigated the characteristics of theses OPV cells using DCNQI derivative dopants from the measurements of the incident photon-to-current collection efficiency and photocurrent. The OPV cell using 3 wt% DHDCNQI exhibited a high PCE of 3.29% due to the high charge separation efficiency, good compatibility and low trap site effect.
Joo Hyung
JH
Lee
Se Young
SY
Oh
D008027:Light; D009570:Nitriles / Q000737:chemistry*; D012666:Semiconductors
C000598555:2,5-dihexyl-N,N'-dicyano-p-quinonediimine; D009570:Nitriles