摘要
对于柔性DSSC的透明光阳极而言,在低温下制备出结晶性高、颗粒间结合性能良好的TiO_2薄膜是其获得优异光电性能的关键。本文通过对比三种不同浆料添加剂(盐酸、乙二醇乙醚、小颗粒凝胶)对DSSC光电性能的影响,发现小颗粒凝胶的加入可以显著提高器件的光电性能。在此基础上,优化了小颗粒凝胶添加量及退火工艺,得出了最佳制备工艺条件,最终获得短路电流密度为8.14mA/cm~2、填充因子为67.9%、光电转化效率为4.1%的DSSC。进一步研究表明,小颗粒凝胶的加入一方面可以增强TiO_2颗粒之间的连接,从而提高TiO_2的成膜质量;另一方面可以增加TiO_2薄膜对光的散射,从而提高电池的吸光率。
For transparent photoanode of flexible DSSC,preparing well-interconnected TiO_2 films with high crystallinity at low temperature is the key to obtaining excellent photoelectric properties.After comparing three annexing agents(hydrochloric acid,2-ethoxyethanol,nanoglue gel),we discovered that DSSC with nanoglue gel achieved the best performance of photoelectric properties.On this basis,we varied amounts of the nanoglue gel in the TiO_2 paste and changed the annealing temperature in order to achieve the optimum parameter.Finally,we determined ultimate parameters of the DSSC and achieved 8.14mA/cm~2 short current,67.9%fill factor and 4.1% power conversion efficiency.Adding nanogluegel,on one hand,could improve the film-forming characteristic of TiO_2 paste by enhancing interconnection between TiO_2 particles,on the other hand,it could enhance light scattering of TiO_2 film in order to improve the absorbance of DSSC.
引文
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