| 含有TiO2刺球散射中心光阳极的设计及其在染料敏化太阳能电池的应用 |
| Design of Photoanodes with TiO2 Bulb Scattering Center and Their Application in Dye Sensitized Solar Cells |
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| 摘要: 采用水热法制备了一种刺球状TiO2（NT），将其作为光散射中心，与纳米晶TiO2混合，制备成一种底层为P25薄膜（作为染料吸收层），上层为添加NT散射层的混合结构的薄膜光阳极。探讨了NT添加量对薄膜性能的影响，实验结果表明，当NT与P25粉体的质量比为35%时电池光电性能最优，电池短路光电流密度为14.30 mA·cm-2，其光电转换效率达到7.38%。质量比继续增大，当达到50%时电池性能有所下降，光电转换效率降为5.99%，同时染料吸附量也由73.2 μmol·cm-2降到70.1 μmol·cm-2。这表明过量的大颗粒TiO2刺球散射中心会减少光阳极的比表面积从而降低染料的有效吸附量，并且还会引起不必要的反向散射，只有适量的散射中心才能得到最佳性能的太阳能电池器件。 |
| 关键词: 二氧化钛 染料敏化太阳能电池 散射中心 光阳极 |
| 基金项目: 国家自然科学基金（No.21171175）资助项目。 |
| Abstract: The thorny TiO2 (NT) is synthesized as light scattering centers, which is then mixed with nanocrystalline TiO2 as the upper layer and P25 film as the dye-absorbing layer located at the bottom. In this approach, the photoanode film with a mixed scattering layer is prepared. The effect of NT addition on film properties is explored. The results show that when the mass ratio of NT powder is 35%, the highest efficiency (7.38%) was obtained, with photocurrent density 14.30 mA·cm-2. When NT addition increased to 50%, the conversion efficiency of the DSSC declines to 5.99%, meanwhile the dye adsorption decreases from 73.2 μmol·cm-2 to 70.1 μmol·cm-2. This demonstrates that excessive addition of the NT leads to a greater reduction of the surface area of the photoanode which affects the dye adsorption. Moreover, large particles will cause further unnecessary reverse scattering, only the moderate scattering centers can generate the optimum solar cell device. |
| Keywords: TiO2 dye sensitized solar cells scattering center photoanode |
| 投稿时间：2016-06-24 修订日期：2016-09-04 |
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| 杨亚辉,吕玉霞,黎航,占发琦.含有TiO2刺球散射中心光阳极的设计及其在染料敏化太阳能电池的应用[J].无机化学学报,2016,32(10):1802-1808. |
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