CAJ | 학술논문

以异丙醇钛为前驱体,采用溶胶水热方法合成了TiO_2纳米晶. 采用XRD和TEM等测试技术研究了合成条件对TiO_2纳米晶的晶粒度、结晶度以及相转变的影响规律. 研究显示,通过控制前驱液的预热处理、水热温度及前驱液浓度等条件,实现了对TiO_2纳米晶的晶型、结晶度、晶粒度 (10～20nm 到120nm) 的稳定调控. 采用优化实验条件后得到的TiO_2纳米晶的水性浆料,使用精确控制膜厚的涂布技术,制作成染料敏化太阳电池 (Dye-Sensitized Solar Cells, DSSC).由于制备的TiO_2纳米晶具有纯锐钛矿晶型、合适的晶粒大小和良好的结晶性,使DSSC的光电转换效率达到了7.33%,高于同样实验条件下以P25或商业TiO_2浆料制作的DSSC的光电转换效率.
이이병순태위전구체,채용용효수열방법합성료TiO_2납미정. 채용XRD화TEM등측시기술연구료합성조건대TiO_2납미정적정립도、결정도이급상전변적영향규률. 연구현시,통과공제전구액적예열처리、수열온도급전구액농도등조건,실현료대TiO_2납미정적정형、결정도、정립도 (10～20nm 도120nm) 적은정조공. 채용우화실험조건후득도적TiO_2납미정적수성장료,사용정학공제막후적도포기술,제작성염료민화태양전지 (Dye-Sensitized Solar Cells, DSSC).유우제비적TiO_2납미정구유순예태광정형、합괄적정립대소화량호적결정성,사DSSC적광전전환효솔체도료7.33%,고우동양실험조건하이P25혹상업TiO_2장료제작적DSSC적광전전환효솔.
TiO_2 nanopaticle was synthesised by sol-hydrothermal using titanium isopropoxide as the precursor. The effects of synthesis conditions on grain size, crystallinity and phase transformation between phase-pure rutile and phase-pure anatase, were analyzed by TEM and XRD. It was revealed that crystal-type, crystallinity and crystal-size (from 10-20nm to 120nm) of TiO_2 nanoparticles could be controlled by the pre-thermal treatment, hydrothermal temperature and concentration of the precursor. A paste, made from the nanoparticles and water, and by a doctor-blade technology which could control the thickness of the film were utilized to make a Dye-Sensitized Solar Cell (DSSC), which achieved a photoelectric conversion efficiency of 7.33%, as a result of the phase-pure anatase, appropriate grain size and favorable crystallinity of the TiO_2 nanoparticles. It exceeded those DSSC's efficiencies made from the commercial paste or P25 paste.