CAJ | 학술논문

采用水热法制备钛酸盐纳米棒,在300、500和700℃下煅烧得到了TiO2纳米棒。采用扫描电子显微镜、透射电子显微镜及X-射线衍射法对所得样品进行了结构表征。将所得TiO2纳米棒作为光阳极组装成染料敏化太阳电池。电流-电压曲线测试表明700℃烧结所得样品的光电性能最优。采用电化学阻抗谱( EIS)、强制光电流谱( IMPS)和强制光电压谱( IMVS)进一步研究TiO2膜电极的动力学过程。结果显示,700℃烧结所得样品制作的电池较其它温度的电池具有更低的电荷转移阻抗、更短的电子转移时间和更长的电子寿命,暗示了其优良的电子传输动力学性能以及更高的电荷收集效率。
채용수열법제비태산염납미봉,재300、500화700℃하단소득도료TiO2납미봉。채용소묘전자현미경、투사전자현미경급X-사선연사법대소득양품진행료결구표정。장소득TiO2납미봉작위광양겁조장성염료민화태양전지。전류-전압곡선측시표명700℃소결소득양품적광전성능최우。채용전화학조항보( EIS)、강제광전류보( IMPS)화강제광전압보( IMVS)진일보연구TiO2막전겁적동역학과정。결과현시,700℃소결소득양품제작적전지교기타온도적전지구유경저적전하전이조항、경단적전자전이시간화경장적전자수명,암시료기우량적전자전수동역학성능이급경고적전하수집효솔。
Hydrothermally synthesized titanate nanorods were calcined at three different temperatures (300, 500 and 700℃) . The prepared samples were characterized by scanning electron microscope/transmission electron microscopy and X-ray diffraction. These samples were used to fabricate photoelectrodes for dye-sensitized solar cells. It was found from current voltage curve measurements that dye-sensitized solar cells with anatase nanorods calcined at 700 ℃ showed the best photoelectrochemical performance. Electrochemical impendence spectroscopy ( EIS ) , intensity - modulated photocurrent spectroscopy( IMPS) , and intensity-modulated voltage spectroscopy ( IMVS) were used to further investigate the kinetics process of TiO2 film electrodes. The results indicated that the anatase nanorods, calcined at 700 ℃, had a lower charge-transfer resistance, a faster transport time and a longer electron lifetime, implying lower electron-hole recombination and a higher charge-collection efficiency.