Photocurrent enhancement of dye-sensitized solar cells owing to increased dye-adsorption onto silicon-nanoparticle-coated titanium-dioxide films.
Photocurrent enhancement of dye-sensitized solar cells owing to increased dye-adsorption onto silicon-nanoparticle-coated titanium-dioxide films.
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DOI：
10.1002/asia.201101055
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发表时间：
2012-03
期刊：
影响因子：
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通讯作者：
Eun-Sung Ha;Beomjin Yoo;H. Baik;Yeonhee Lee;Kang‐Jin Kim
中科院分区：
文献类型：
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作者：
Eun-Sung Ha;Beomjin Yoo;H. Baik;Yeonhee Lee;Kang‐Jin Kim
利用萘酸钠改进了反胶束法制备纳米硅粒子的工艺。随后用4-乙烯基苯甲酸将Si Nps官能化，用于将其附着到染料敏化太阳能电池（DSSC）的TiO（2）膜上。COOH官能化的Si（Si-COOH）Nps的平均直径为4.6（± 1.7）nm。二次离子质谱深度分析表明，Si纳米粒子均匀地附着在TiO（2）薄膜上。吸附到用Si-COOH Nps处理的TiO（2）膜上的Ru（II）染料分子的数目比未处理的TiO（2）膜上的Ru（II）染料分子的数目高42%。结果，掺入Si-COOH Nps的DSSC表现出比未处理的DSSC分别高22%和27%的短路光电流密度和总能量转换效率。这种增强的性能，主要是由于分子内电荷转移到TiO（2）从染料分子锚定的Si-COOH纳米粒子，证实了通过比较与两种不同的Ru（II）-联吡啶染料（N719和N749）的性能。
The inverse-micellar preparation of Si nanoparticles (Nps) was improved by utilizing sodium naphthalide. The Si Nps were subsequently functionalized with 4-vinylbenzoic acid for their attachment onto TiO(2) films of dye-sensitized solar cells (DSSCs). The average diameter of the COOH-functionalized Si (Si-COOH) Nps was 4.6(±1.7) nm. Depth profiling by secondary-ion mass spectrometry revealed that the Si Nps were uniformly attached onto the TiO(2) films. The number of Ru(II) dye molecules adsorbed onto a TiO(2) film that was treated with the Si-COOH Nps was 42 % higher than that on the untreated TiO(2) film. As a result, DSSCs that incorporated the Si-COOH Nps exhibited higher short-circuit photocurrent density and an overall energy-conversion efficiency than the untreated DSSCs by 22 % and 27 %, respectively. This enhanced performance, mostly owing to the intramolecular charge-transfer to TiO(2) from the dye molecules that were anchored to the Si-COOH Nps, was confirmed by comparing the performance with two different Ru(II) -bipyridine dyes (N719 and N749).