Endohedral fullerenes for organic photovoltaic devices

摘要: A limiting factor of the power conversion efficiencies organic photovoltaic devices is low voltage output. Methano derivatives trimetallic endohedral fullerene Lu3N@C80 have now been synthesized and used as acceptor in photovoltaics. The open circuit significantly above those made using alternative fullerenes. So far, one fundamental limitations (OPV) device (PCEs) has output caused by a molecular orbital mismatch between donor polymer molecules. Here, we present means addressing introducing novel nitride fullerenes (TNEFs) materials for use devices. TNEFs were discovered 1999 Stevenson et al. 1; first time TNEF acceptor, Lu3N@C80, are integrated into OPV reduced energy offset orbitals to donor, poly(3-hexyl)thiophene (P3HT), reduces losses charge transfer process increases (Voc) 260 mV reference with [6,6]-phenyl-C61-butyric methyl ester (C60-PCBM) acceptor. PCEs >4% observed P3HT material. This work clears path towards higher demonstrating that high-yield separation can occur systems donor/acceptor lowest unoccupied offset.