摘要
Three small molecules with the same arms and different cores of perylene diimide(PDI)or indaceno[2,1-b:6,5-b']dithiophene(IDT)were designed and synthesized as the acceptor materials for P3HT-based bulk-heterojunction(BHJ)solar cells.The impacts of the different cores on the optical absorption,electrochemical properties,electron mobility,film morphology,photoluminescene characteristics,and solar cell performance were thoroughly studied.The three compounds possess a broad absorption covering the wavelength range of 400–700 nm and relatively low lowest unoccupied molecular orbital(LUMO)energy levels of?3.86,?3.81 and?3.99 eV.The highest power conversion efficiency of 0.82%was achieved for the BHJ solar cells based on SM3 as the acceptor material,the compound with a PDI core.
Three small molecules with the same arms and different cores of perylene diimide （PDI） or indaceno[2,1-b：6,5-b＇]dithiophene （IDT） were designed and synthesized as the acceptor materials for P3HT-based bulk-heterojunction （BHJ） solar cells. The impacts of the different cores on the optical absorption, electrochemical properties, electron mobility, film morphology, photoluminescene characteristics, and solar cell performance were thoroughly studied. The three compounds possess a broad absorption covering the wavelength range of 400-700 nm and relatively low lowest unoccupied molecular orbital （LUMO） energy levels of-3.86, -3.81 and -3.99 eV. The highest power conversion efficiency of 0.82% was achieved for the BHJ solar cells based on SM3 as the acceptor material, the compound with a PDI core.
基金
supported by the National Basic Research Program of China(2014CB643501)
the National Natural Science Foundation of China(51073057 and 91233116)
the Ministry of Education(NCET-11-0159)
the Guangdong Natural Science Foundation(S2012030006232)
the Fundamental Research Funds for the Central Universities(2013ZG0007)
