Exciton Dissociation at Indium Tin Oxide/Indium doped Zinc Phthalocyanine Interface
A new intercalation of Indium and zinc phthalocyanine(ZnPc) thin film is developed by using thermal co-evaporation technique.The exciton dissociation at the interface of Indium Tin Oxide(ITO) electrode and Indium doped ZnPc upon laser irradiation is observed through the transient photovoltage measurement technique in comparison with the interfacial exciton dissociation occurred at ITO/pristine ZnPc interface.The occurring transient photovoltage spike is regarded as the effect of exciton dissociation at ITO/In-doped ZnPc interface and depends on the amount of free carrier separation by built-in field or charge carrier concentration according to doping ratio.The experiments demonstrate the existence of exciton dissociation at ITO/In-doped ZnPc interface,the direction of charges transfer is that holes are injected to ITO,whereas electrons are left in bulk film.A thin insulating layer of 6 nm thick lithium fluoride(LiF) is inserted between ITO and In-doped ZnPc to prevent the exciton dissociation at ITO/In-doped ZnPc interface and insist on the phenomenon of interfacial exciton dissociation.Further photoelectron spectroscopy experiments prove that In-doped ZnPc is hole transport material.
Indium doped Zinc Phthalocyanine transient photovoltage exciton dissociation
Pakorn Prajuabwan Sunit Rojanasuwan Annop Chanhom Anuchit Jaruvanawat Adirek Rangkasikorn Jiti Nukeaw
College of Nano Technology,King Mongkuts Institute of Technology Ladkrabang,THAILAND;Thailand Cente College of Nano Technology,King Mongkuts Institute of Technology Ladkrabang,THAILAND;Thailand Cente
国际会议
济南
英文
140-147
2012-12-29（万方平台首次上网日期，不代表论文的发表时间）