摘要:
采用电子束（EB）对聚丙烯腈/聚氧化乙烯（PAN/PEO）凝胶电解质进行了剂量为13～260kGy的辐照,并对辐照改性的电解质组装的染料敏化太阳电池（DSSC）进行了性能测量。结果表明,改性后的DSSC的光电转化效率比改性前的高;并且随EB辐照剂量的增加,DSSC效率先迅速增加（0～65kGy）,然后缓慢减小（65～130kGy）直至趋于一个平衡值（130～260kGy）。提升DSSC效率的最佳辐照剂量为65kGy,此时效率提高了约36%。对比DSSC短路电流、开路电压和填充因子随辐照剂量的变化,发现DSSC效率的提高主要是由短路电流的提高引起的。测量表明,辐照改性后的DSSC时间稳定性得到了改善,并且辐照剂量越高,稳定性的改善越明显。
Abstract:
In this work,PAN/PEO（polyacrylonitrile/polyethylene oxide）-based gel electrolyte was irradiated by electron beam（EB） with dose from 13 to 260 kGy.Then,DSSC（dye-sensitized solar cell） was fabricated by the irradiated electrolyte and characterized.The results show that the efficiency of the DSSC fabricated by irradiated electrolyte is promoted comparing with DSSC fabricated by un-irradiated electrolyte.And with irradiation dose increasing,the DSSC efficiency increases rapidly at first（0～65 kGy）,then,drops down slowly（65～130 kGy）,finally trends to a stable value（130～260 kGy）.It indicates that there is an optimal irradiation dose,at which the promotion of DSSC efficiency is the highest,approximate 36%.Observed from the change of short-circuit current,open-circuit voltage and fill factor,short-circuit current promotion by EB irradiation is found to be the main reason of DSSC performance promotion.The time stability measurement of the DSSC indicates that EB irradiation on PAN/PEO electrolyte reduces the loss of efficiency and the limiting-effects become more apparent as the irradiation dose increases.
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