【摘要】 采用改良Hummers法和微波还原法制备石墨烯,通过XRD、FT-IR探究不同微波还原时间对石墨烯结构的影响。将经不同微波还原时间所得的石墨烯应用在染料敏化太阳能电池的对电极中,通过伏安曲线、电化学阻抗谱分析其性能。结果表明,随着微波还原时间的延长,石墨烯还原程度逐渐增加。在模拟太阳能光源(AM 1.5)下,以微波还原时间为90min的石墨烯作对电极而组装得到的染料敏化太阳能电池的内阻最小(24Ω),性能最佳。其短路电流、填充因子及光电转换效率分别为2.75(mA/cm~2)、14%和0.174%。更多还原

【Abstract】 Graphene was prepared via modified hummers method and microwave reduction route.The effect of different microwave reduction time on the structure of graphene was investigated by XRD and FT-IR.Then,graphene obtained under various microwave reduction time were applied in the counter electrode of dye-sensitized solar cell.Its property was analyzed by voltage-current curve and electrochemical impedance spectroscopy.The results showed that with the increase of microwave reduction time,the reduction degree of graphene increased.Under simulated solar light source(AM 1.5),the dye-sensitized solar cell fabricated with graphene obtained under 90 min microwave reduction time had minimum internal resistance(24Ω)and optimum property.The short-circuit current,fill factor and photoelectric conversion efficiency were 2.75(mA/cm2),14% and 0.174%,respectively.更多还原