| 학회 | 한국재료학회 |
| 학술대회 | 2014년 가을 (11/27 ~ 11/28, 대전컨벤션센터) |
| 권호 | 20권 2호 |
| 발표분야 | B. 나노 재료(Nanomaterials) |
| 제목 | Enhanced photocurrent of electrodeposited Sb-doped ZnO nanowires by controlling Sb-mole fraction |
| 초록 | ZnO has been researched to apply for various devices such as LED, photo detector, photovoltaic and photoelectrochemical (PEC) cells due to proved optical and electrical properties by high electron mobility, direct band gap (3.37 eV), large exciton binding energy (60 meV). Controlling morphology of ZnO layers are also attractive to research for those devices. Various methods to prepare ZnO have been introduced. Among them, electrochemical deposition is recently attractive, because the process parameters are easily controlled with low cost as well as saving time. Antimony (Sb) doping in the ZnO is expected to show ambipolar characteristics depending on doping behavior. The substitutional doping in Zn and O sites induces n-type and p-type, respectively. Photocurrent responses which are involved with substitutional dopant of nanostructured ZnO layers are investigated for energy conversion and harvesting that are important issues to cope resource depletion. PEC performance is influenced by the structural, electrical, and optical properties of the material. Also, photocurrent of photoactive materials is dependent on their electrical conductivity. In this research, we fabricated Sb-doped ZnO by electrochemical deposition to investigate the change of electrical properties, photo responses. Commercial ITO glass, Ag/AgCl (sat.NaCl), and Pt mesh was selected as working electrode, reference electrode, and counter electrode, respectively. Applied potential and growth temperature were fixed as -0.8 V and 80 ℃. The Sb precursor concentration was controlled by ion concentration in the electrolyte. After the deposition, moreover, thermal annealing was performed. As a result, we confirmed donor behavior of Sb dopants in the ZnO layers. Photocurrent responses which are involved with substitutional dopants of nanostructured ZnO layers are investigated for the applications in the photoelectronic devices. Enhanced photocurrent of electrodeposited Sb-doped ZnO nanowires in photoelectrochemical test has been obtained by controlling Sb-mole fraction. Consequently, electrodeposited Sb-doped ZnO layers could be one of the applicable materials for photovoltaic and photoelectrochemical (PEC) cells. |
| 저자 | 신재희, 백승기, 조형균 |
| 소속 | 성균관대 |
| 키워드 | Sb-doped ZnO; electrochemical deposition; photoelectrochemical(PEC) cell |
