CAJ | 학술논문

采用模板剂法一步合成分级结构的介孔TiO2微球,考察了烷基胺类模板剂中烷基链长度对介孔TiO2微球合成及性能影响.将其应用于染料敏化太阳能电池的光阳极半导体薄膜中,得到了9.52%-10.15%的高能量转换效率. X射线衍射(XRD)、物理吸附仪(BET)、扫描电镜(SEM)等的分析结果表明:分级结构介孔TiO2微球的晶相为纯锐钛矿型;介孔TiO2微球表面粗糙,是由14-18 nm的纳米粒子堆积形成,使微球具有介孔性质和较适宜的比表面积.介孔TiO2微球堆积形成了利于物质扩散的通道并具有良好的光散射效果;同时微球介孔粗糙表面保证了染料的大量吸附,从而提高了电池的光电流.通过电化学阻抗分析结果验证了分等级结构介孔TiO2微球光阳极有利于电解液的传输和物质扩散的优异性能.
채용모판제법일보합성분급결구적개공TiO2미구,고찰료완기알류모판제중완기련장도대개공TiO2미구합성급성능영향.장기응용우염료민화태양능전지적광양겁반도체박막중,득도료9.52%-10.15%적고능량전환효솔. X사선연사(XRD)、물리흡부의(BET)、소묘전경(SEM)등적분석결과표명:분급결구개공TiO2미구적정상위순예태광형;개공TiO2미구표면조조,시유14-18 nm적납미입자퇴적형성,사미구구유개공성질화교괄의적비표면적.개공TiO2미구퇴적형성료리우물질확산적통도병구유량호적광산사효과;동시미구개공조조표면보증료염료적대량흡부,종이제고료전지적광전류.통과전화학조항분석결과험증료분등급결구개공TiO2미구광양겁유리우전해액적전수화물질확산적우이성능.
Mesoporous TiO2 microspheres were synthesized using a simple template method. The effect of the alkyl chain length on the synthesis and properties of the TiO2 microspheres was studied. A high power conversion efficiency (9.5%-10.1%) was attained by the dye-sensitized solar cel s (DSCs) fabricated with the hierarchical y mesoporous TiO2 microsphere films. The physical properties of the TiO2 microspheres were analyzed by X-ray diffraction (XRD), N2 physisorption (BET), and scanning electron microscopy (SEM). The results indicated the TiO2 microsphere crystal structure to be in the pure anatase phase; the rough surface microstructure of the TiO2 microspheres, formed through accumulation of nanocrystal ine (14-18 nm diameter) TiO2 particles, provides a proper large surface area and mesoporous structure. The hierarchical y mesoporous TiO2 microspheres can form good paths for mass transport, and also act as light scattering layers for efficient light harvesting. Meanwhile, the rough TiO2 microsphere surface ensures a sufficient amount of dye uptake, and consequently improves the photo-generated electron density. Electrochemical impedance analysis demonstrated the advantage of using microspheres for mass transport in electrolytes.