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For the purpose of developing organic photovoltaic devices with good performance characteristics,we have fabricated twodevices using 4T-CHO,5T-CHO and PTCDA.The ITO/4T-CHO/PTCDA/Al device has a V_oc of 2.45 V and photoelectricconversion efficiency of 2.76%.The ITO/5T-CHO/PTCDA/Al device has a V_oc of 2.1 3V and photoelectric conversion efficiency of2.90%.The two devices have higher Voc(2.45 and 2.13 V).It is possible that intermolecular hydrogen bonding between-CHOgroup of nT-CHO and carboxylic dianhydride of PTCDA contribute to enhance the efficiency by promoting interfacial electrontransfer and eliminating the subconducting band trap sites.
For the purpose of developing organic photovoltaic devices with good performance characteristics, we have fabricated twodevices using 4T-CHO, 5T-CHO and PTCDA.The ITO / 4T-CHO / PTCDA / Al device has a V_oc of 2.45 V %. The ITO / 5T-CHO / PTCDA / Al device has a V_oc of 2.1 3V and a photoelectric conversion efficiency of 2.90%. The two devices have higher Voc (2.45 and 2.13 V). It is possible that that intermolecular hydrogen bonding between- CHOgroup of nT-CHO and carboxylic dianhydride of PTCDA contribute to enhance the efficiency by promoting interfacial electrontransfer and eliminating the subconducting band trap sites.