Organic semiconductor composites: Influence of additives on the transient photocurrent
نویسندگان
چکیده
We report on the effect of various guest molecules added to a functionalized anthradithiophene ADT host on photoexcited charge carrier dynamics in solution-deposited thin films, from 100 ps to 100 s after photoexcitation with 100 fs laser pulses. An addition of 2 and 5 wt % of C60 to a fluorinated ADT derivative, ADT-TES-F, resulted in transient photocurrent amplitude enhancement by a factor of 3 and 10, respectively. In contrast, an addition of 10 wt % of another ADT derivative, ADT-TIPS-CN, or a functionalized pentacene derivative TIPS pentacene to ADT-TES-F led to a decrease in the amplitude by a factor of 3–4 and dramatically different photocurrent dynamics. © 2009 American Institute of Physics. DOI: 10.1063/1.3062850
منابع مشابه
Influence of organic semiconductor-metal interfaces on the photoresponse of functionalized anthradithiophene thin films
We report on the contribution of effects at the organic semiconductor-metal interfaces to dark current and to transient and continuous wave cw photocurrent in high-performance functionalized anthradithiophene ADT films deposited from solution on glass substrates with gold Au and aluminum Al electrodes. In all samples, fast sub-30 ps charge carrier photogeneration was observed under photoexcitat...
متن کاملAnomalous Transient Photocurrent
The operating principle in conventional optoelectronic devices is based on steady-state photocurrent. In these devices, photogenerated carriers have to travel long distances across the devices. Various dissipation mechanisms such as traps, scattering and recombination dissipate these carriers during transport, and decrease device response speed as well as optoelectronic conversion efficiency, e...
متن کاملStudy nanostructures of semiconductor zinc oxide (ZnO) as a photocatalyst for the degradation of organic pollutants
In the present study, comparison of photocatalytic activity of nanostructures semiconductor zinc oxide (ZnO) was prepared using the different methods on the degradation of organic dye such as methylene blue that was investigated. Previous studies have proved that such semiconductors can degrade most kinds of persistent organic pollutants, such as detergents, dyes, pesticides and volatile organ...
متن کاملStudy nanostructures of semiconductor zinc oxide (ZnO) as a photocatalyst for the degradation of organic pollutants
In the present study, comparison of photocatalytic activity of nanostructures semiconductor zinc oxide (ZnO) was prepared using the different methods on the degradation of organic dye such as methylene blue that was investigated. Previous studies have proved that such semiconductors can degrade most kinds of persistent organic pollutants, such as detergents, dyes, pesticides and volatile organ...
متن کاملUtilizing Wide Band Gap, High Dielectric Constant Nanoparticles as Additives in Organic Solar Cells
We experimentally and theoretically investigate the effects of utilizing BaTiO3 nanoparticles as additives in polythiophene/fullerene solar cells. BaTiO3 nanoparticles were chosen because of their multifaceted potential for increasing exciton dissociation (due to their high dielectric constant) and light scattering. To achieve stable suspensions for device fabrication, the nanoparticles were fu...
متن کامل