【摘要】 针对染料敏化太阳电池,建立了与其光电过程相关的外量子转换效率解析模型,并根据模型系统研究此类电池中的光电参量（如光子吸收系数α、电子扩散系数D、电子寿命τ、电极处电子抽取速率kext）对电池外量子转化效率的影响.在染料分子的光吸收系数逐渐增加的情况下,外量子转换效率逐渐上升,然后趋于饱和.随着电子扩散系数的增大,电子传输到收集电极的能力增加,使得外量子转换效率提升.电子寿命在10^-5 s到10^-2 s内增加可以大幅度提升外量子转换效率,而且电子抽取速率小于100cm/s时,其具有显著的影响.此研究为该类电池外量子转化效率的提高和电池器件的优化提供了科学依据.更多还原

【Abstract】 This paper describes an analytical quantum conversion efficiency model for dye-sensitized solar cells(DSCs)based on photon-to-current conversion processes,and some optoelectronic parameters(e.g.,photon absorption coefficientα,electron diffusion coefficient D,electron lifetimeτ,electron extraction coefficient kext),and their influence on device external quantum conversion efficiency have been investigated.When the photon absorption coefficient of the dye molecules gradually increases,the external quantum conversion efficiency gradually increases and eventually becomes saturated.With the increase of the electron diffusion coefficient,the ability of the electrons transporting to the collecting electrodes can be increased,therefore,the external quantum conversion efficiency can be improved.The increase in electron lifetime from 10-5 s to 10-2 s can significantly enhance the efficiency of external quantum conversion efficiency,especially when the electron extraction rate is less than 100cm/s.This research provides a scientific basis for the improvement of quantum conversion efficiency and device optimization for DSCs.更多还原