title: Photovoltaic performances of Cu2-xTe sensitizer based on undoped and indium(3+)-doped TiO2 photoelectrodes and assembled counter electrodes.
abstract: Novel binary Cu2-xTe nanoparticles based on undoped and indium-doped TiO2 photoelectrodes were synthesized using a successive ionic layer adsorption and reaction (SILAR) technique as a sensitizer for liquid-junction solar cells. A larger diameter of TiO2 promoted a narrower energy band gap after indium doping, attributing to yield a broader absorption range of nanoparticle sensitizer due to the increasing amount of Cu2-xTe NPs on TiO2 surface. The atomic percentages showed the stoichiometric formation of Cu2Te incorporated in a Cu2-xTe structure. The best photovoltaic performance with the lower SILAR cycle, i.e., n=13 was performed after indium doping in both of carbon and Cu2S CEs and revealed that the efficiency of 0.73% under the radiant 100mW/cm(2) (AM 1.5G). The electrochemical impedance spectroscopy (EIS) was used to investigate the electrical properties via effect of material doping and counter electrodes with a lower charge-transfer resistance (Rct) and it was also found that the electron lifetime was improved after the sample doped with indium and assembled with carbon CE.
authors.affiliation: Department of Chemistry, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand. Electronic address: pornpimol.srathongluan@gmail.com.
authors.forename: Pornpimol
authors.initials: P
authors.lastname: Srathongluan
authors.affiliation: Department of Physics, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand. Electronic address: rat_ta_na_korn@hotmail.com.
authors.forename: Rattanakorn
authors.initials: R
authors.lastname: Kuhamaneechot
authors.affiliation: Department of Physics, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand. Electronic address: prapatsawan71034@gmail.com.
authors.forename: Prapatsawan
authors.initials: P
authors.lastname: Sukthao
authors.affiliation: Department of Chemistry, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand. Electronic address: veeramol.v@ku.ac.th.
authors.forename: Veeramol
authors.initials: V
authors.lastname: Vailikhit
authors.affiliation: Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; ThEP Center, CHE, Bangkok 10400, Thailand. Electronic address: supab99@gmail.com.
authors.forename: Supab
authors.initials: S
authors.lastname: Choopun
authors.affiliation: Department of Physics, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand; Nano Engineering & Material Sciences Research Unit (NEMS), Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand. Electronic address: tubtimtae@gmail.com.
authors.forename: Auttasit
authors.initials: A
authors.lastname: Tubtimtae
keywords: Copper telluride; Indium(3+) doping; Semiconductor nanoparticles; Solar cells; Successive ionic layer adsorption and reaction technique