Visible-light-response iodine-doped titanium dioxide nanocrystals for dye-sensitized solar cells
Visible-light-response iodine-doped titanium dioxide nanocrystals for dye-sensitized solar cells
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用于染料敏化太阳能电池的可见光响应碘掺杂二氧化钛纳米晶体
DOI：
10.1039/c0jm03327h
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发表时间：
2011-03
影响因子：
--
通讯作者：
Tao, Xia
中科院分区：
文献类型：
--
作者：
Hou, Qian;Zheng, Yanzhen;Chen, Jian-Feng;Zhou, Weilie;Deng, Jie;Tao, Xia
我们报道了可见光响应的碘掺杂二氧化钛纳米晶体（I-TNC）的合成，以及它们作为染料敏化太阳能电池（DSSC）的光阳极的实现。I-TNCs的制备是通过异丙醇钛在碘基水溶液中水解，然后通过水热处理和退火过程来实现的。采用TEM、SEM、XRD、EDS和XPS对I-TNCs进行了表征。在优化的I/Ti掺杂比为20 mol%时，基于I-TNC的电池的光伏性能明显更好，在100 mW cm-2光照下的能量转换效率为7.0%，比基于未掺杂的TNC的电池高42.9%。有趣的是，基于I-TNC的电池在30 mW cm−2照明下显示出10.0%的更高转换效率。通过扩展的可见光捕获（其特征在于入射光子到电流转换效率和UV-vis吸收光谱）、降低的复合电阻（其特征在于电化学阻抗谱，Rrec）以及延长的电子寿命τe来解释改进的性能。这些结果表明，在DSSC应用中具有控制掺杂的TiO 2纳米晶体的实质性潜力。
We report on the synthesis of visible-light-response iodine-doped TiO2 nanocrystals (I-TNCs), and their implementation as photoanodes of dye-sensitized solar cells (DSSCs). The preparation of I-TNCs starts with hydrolysis of titanium isopropoxide in iodine-based aqueous system, followed by hydrothermal treatment and annealing process to achieve anatase structure. The I-TNCs were characterized by TEM, SEM, XRD, EDS and XPS. Under an optimized I/Ti doping ratio of 20 mol%, the photovoltaic performance of the cell based on I-TNCs is significantly better, with an energy-conversion efficiency of 7.0% under 100 mW cm−2 illumination, which is 42.9% higher than that of the cell based on undoped TNCs. Interestingly, the I-TNCs-based cell shows a higher conversion efficiency of 10.0% under 30 mW cm−2 illumination. The improved performance is explained by the expanded visible-light harvesting (characterized by incident photon to current conversion efficiency and UV-vis absorption spectra), lowered recombination resistance (characterized by electrochemical impedance spectroscopy, Rrec) together with prolonged electron lifetime τe. These results suggest substantial potential of TiO2 nanocrystals with controlled doping in DSSC application.
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影响因子：
3.3
作者：
Diamant, Y;Chen, SG;Zaban, A
通讯作者：
Zaban, A
影响因子：
4
作者：
Hsuan-Fu Yu
通讯作者：
Hsuan-Fu Yu
影响因子：
8.6
作者：
Sandro Usseglio;P. Calza;A. Damin;C. Minero;S. Bordiga;C. Lamberti;E. Pelizzetti;A. Zecchina
通讯作者：
Sandro Usseglio;P. Calza;A. Damin;C. Minero;S. Bordiga;C. Lamberti;E. Pelizzetti;A. Zecchina
影响因子：
3.7
作者：
Fabregat-Santiago, Francisco;Bisquert, Juan;Gratzel, Michael
通讯作者：
Gratzel, Michael
影响因子：
6.9
作者：
Fabregat-Santiago, F;Bisquert, J;Hagfeldt, A
通讯作者：
Hagfeldt, A