杨春敏, 罗小成, 刘玉静, 段军红, 刘伟庆. Al掺杂对SnO2纳米晶的能带及染料敏化太阳电池效率的影响[J]. 南昌航空大学学报(自然科学版), 2018, 32(3): 50-56. DOI: 10.3969/j.issn.1001-4926.2018.03.008
引用本文: 杨春敏, 罗小成, 刘玉静, 段军红, 刘伟庆. Al掺杂对SnO2纳米晶的能带及染料敏化太阳电池效率的影响[J]. 南昌航空大学学报(自然科学版), 2018, 32(3): 50-56. DOI: 10.3969/j.issn.1001-4926.2018.03.008
YANG Chun-min, LUO Xiao-cheng, LIU Yu-jing, DUAN Jun-hong, LIU Wei-qing. The influence of SnO2 Nanoparticle Conduction Band and the Performance of Dye-sensitized Solar Cells with Al Doping[J]. Journal of nanchang hangkong university(Natural science edition), 2018, 32(3): 50-56. DOI: 10.3969/j.issn.1001-4926.2018.03.008
Citation: YANG Chun-min, LUO Xiao-cheng, LIU Yu-jing, DUAN Jun-hong, LIU Wei-qing. The influence of SnO2 Nanoparticle Conduction Band and the Performance of Dye-sensitized Solar Cells with Al Doping[J]. Journal of nanchang hangkong university(Natural science edition), 2018, 32(3): 50-56. DOI: 10.3969/j.issn.1001-4926.2018.03.008

Al掺杂对SnO2纳米晶的能带及染料敏化太阳电池效率的影响

The influence of SnO2 Nanoparticle Conduction Band and the Performance of Dye-sensitized Solar Cells with Al Doping

  • 摘要: 宽带隙二氧化锡(SnO2)纳米晶体具有良好的物理化学稳定性和较高电子迁移率,可用于染料敏化太阳电池(DSSCs),也是DSSCs中TiO2光阳极的重要替代品。然而,基于SnO2光阳极的DSSC光生载流子易于复合,因此电池效率不高。故通过水热法合成了不同比例的Al掺杂SnO2纳米晶,采用丝网印刷法制作Al掺杂SnO2薄膜光阳极。在标准条件下(AM 1.5,100 mW/cm2)测试电池效率,与纯SnO2 DSSCs相比,2% Al掺杂SnO2电池的开路电压(0.6 V)、电流密度(9.61 mA/cm2)、填充因子(61.08%)都有所提高,电池效率由1.28%提高到3.51%。研究结果表明:Al掺杂能有效调节SnO2带隙,同时抑制光生载流子的复合,从而有效提高电池效率。

     

    Abstract: As a wide band gap, chemical stability, and high electron mobility, SnO2 is an important alternative to TiO2 for use as a semiconductor in dye-sensitized solar cells (DSSCs) photoanodes. However, due to its high charge recombination, the energy-conversion efficiency for pure SnO2-based DSSCs is rather limited so far. In this work, SnO2 nanocrystals with different proportion Al doping were prepared by simple hydrothermal method. Al-doped SnO2 photoanodes were fabricated by silk-screen printing. Comparing to pure SnO2 DSSC, the open-circuit voltage, short circuit current, fill factor of 2% Al-doped SnO2 photoanode are 0.6 V, 9.61 mA/cm2 and 61.08%, respectively, in an AM 1.5 solar simulator. The DSSCs energy conversion efficiency of 2% Al-doped SnO2 improves from 1.28% to 3.51%. The results show that the Al-doped SnO2 nanocrystals for DSSCs can adjust SnO2 conduction band and suppress charge recombination. The energy-conversion efficiency of 2% Al-doped SnO2 DSSCs effectively is enhanced consequently.

     

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