The photon-current conversion properties of nanostructured TiO2/Q-CdS film electrode were studied by using the photocurrent action spectra and the photocurrent dependence of potential.Because of quantum size effect,th...The photon-current conversion properties of nanostructured TiO2/Q-CdS film electrode were studied by using the photocurrent action spectra and the photocurrent dependence of potential.Because of quantum size effect,the bandgap of Q-CdS particles was widened to 2.51eV which were prepared when they were immersed in Cd(NO3)2 and Na2S solution respectively for 60s and then dried at 80℃.The diagram of energy level of Q-CdS film was determined with the photocurrent-potential curves and photoelectrochemical method.The valence band of Q-CdS film was-6.168eV(vs Vaccum).The nanostructured TiO2/Q-CdS film electrode could enlarge absorption region and obviously increase the photocurrent.The photon-electron conversion efficiency could be improved.展开更多
采用水热法和磁控溅射法相结合,在FTO导电玻璃上分别制备金属Pt和Cu1.8S/CuS薄膜,构成复合对电极,并将其成功应用到CdS量子点敏化TiO_2纳米管太阳电池中.这种复合对电极能够与多硫电解质相匹配,有效地提高量子点敏化太阳能电池的光电转...采用水热法和磁控溅射法相结合,在FTO导电玻璃上分别制备金属Pt和Cu1.8S/CuS薄膜,构成复合对电极,并将其成功应用到CdS量子点敏化TiO_2纳米管太阳电池中.这种复合对电极能够与多硫电解质相匹配,有效地提高量子点敏化太阳能电池的光电转化效率.利用X线衍射仪(XRD)、场发射扫描电镜电极(SEM)和透射电镜(TEM)对复合对电极和TiO_2纳米管光阳极的结构与形貌进行表征,通过AM1.5模拟太阳光测试系统对其光电性能进行表征.结果表明:复合对电相较与传统的Pt对电极和Cu1.8S/CuS单一对电极而言具有明显优势,提高了CdS量子点敏化太阳能电池的短路电流密度(9.27 m A/cm^2)、开路电压(0.577 V)和填充因子(49.4%),最终获得2.64%的光电转化效率.展开更多
基金Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP) (20050698034)Natural Science Basic Research Plan in Shaanxi Province of China (SJ08E106)
文摘The photon-current conversion properties of nanostructured TiO2/Q-CdS film electrode were studied by using the photocurrent action spectra and the photocurrent dependence of potential.Because of quantum size effect,the bandgap of Q-CdS particles was widened to 2.51eV which were prepared when they were immersed in Cd(NO3)2 and Na2S solution respectively for 60s and then dried at 80℃.The diagram of energy level of Q-CdS film was determined with the photocurrent-potential curves and photoelectrochemical method.The valence band of Q-CdS film was-6.168eV(vs Vaccum).The nanostructured TiO2/Q-CdS film electrode could enlarge absorption region and obviously increase the photocurrent.The photon-electron conversion efficiency could be improved.
文摘采用水热法和磁控溅射法相结合,在FTO导电玻璃上分别制备金属Pt和Cu1.8S/CuS薄膜,构成复合对电极,并将其成功应用到CdS量子点敏化TiO_2纳米管太阳电池中.这种复合对电极能够与多硫电解质相匹配,有效地提高量子点敏化太阳能电池的光电转化效率.利用X线衍射仪(XRD)、场发射扫描电镜电极(SEM)和透射电镜(TEM)对复合对电极和TiO_2纳米管光阳极的结构与形貌进行表征,通过AM1.5模拟太阳光测试系统对其光电性能进行表征.结果表明:复合对电相较与传统的Pt对电极和Cu1.8S/CuS单一对电极而言具有明显优势,提高了CdS量子点敏化太阳能电池的短路电流密度(9.27 m A/cm^2)、开路电压(0.577 V)和填充因子(49.4%),最终获得2.64%的光电转化效率.
