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.
Document Type: Research Article
Publication date: 01 August 2014
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