【摘要】：本論文主要研究非金屬元素氮（N）、稀土金屬元素鑭（La）、鈰（Ce）、釤（Sm）對納米晶TiO2顆粒的摻雜改性，以及釤和氮的共摻雜，并將其應(yīng)用在染料敏化太陽能電池光陽極中。實驗中，分別采用傳統(tǒng)的濕法制備氮摻雜TiO2納米粒子和水熱合成法制備稀土離子摻雜TiO2納米粒子，并制備成光陽極組裝電池，通過一系列分析方法對其光、電化學(xué)性質(zhì)進行研究，，并對反應(yīng)條件、摻雜量等進行了工藝優(yōu)化。主要工作內(nèi)容如下： 1）采用濕法制備了氮摻雜TiO2納米粒子，研究了不同攪拌時間及氨水添加量對由其制備的光陽極組裝的電池光電性能的影響，確定了最優(yōu)條件是攪拌時間為1.5h，氨水添加量為50ml。在最優(yōu)的反應(yīng)條件下，引入尿素作為第二個氮源進行雙氮摻雜，得到最優(yōu)化的尿素添加量為0.5g，得到7.58%的光電轉(zhuǎn)換效率。 2）采用水熱法制備了稀土離子摻雜的TiO2納米粒子，探討了最優(yōu)稀土硝酸鹽添加量為1g P25中摻雜0.05g稀土硝酸鹽。分別選擇了La(NO3)3、Ce(NO3)3、Sm(NO3)3對納米TiO2粒子進行摻雜，通過不同的染料N719和卟啉進行敏化對比，從光電流密度提升的角度進一步證明了稀土離子下轉(zhuǎn)換發(fā)光對染料敏化太陽能電池光電性能的影響，分別得到了6.43%（N719染料敏化）、3.62%（卟啉染料敏化）的轉(zhuǎn)換效率。 3）選取了氮元素和硝酸釤，采用水熱法進行共摻雜納米TiO2粒子的制備。并用其制備光陽極組裝電池進行光電性能測試，得到的轉(zhuǎn)化效率相較于單一的氮摻雜和單一硝酸釤摻雜并沒有獲得顯著的提高。通過研究機理認為，氮摻雜和釤摻雜一定程度上都是提高染料敏化太陽能電池對可見光的吸收，因此兩者之間并沒有協(xié)同作用。
[Abstract]:In this thesis, the doping modification of nano-crystalline TiO2 particles and co-doping of samarium and nitrogen by non-metallic element nitrogen (N), rare earth element lanthanum (La), cerium (Ce), samarium (Sm) were studied. And it is applied in dye sensitized solar cell photoanode. In the experiment, nitrogen-doped TiO2 nanoparticles were prepared by traditional wet method and rare earth ion-doped TiO2 nanoparticles were prepared by hydrothermal synthesis method. The photoanode assembled cells were prepared by a series of analytical methods. The electrochemical properties were studied, and the reaction conditions, doping amount and so on were optimized. The main contents are as follows: 1) nitrogen-doped TiO2 nanoparticles were prepared by wet method, and the effects of different stirring time and ammonia content on the photoelectric properties of the photoanode assembled cells were studied. The optimum condition is that the stirring time is 1.5 h and the amount of ammonia is 50 ml. Under the optimal reaction conditions, urea was introduced as the second nitrogen source to doping with dinitrogen, and the optimal amount of urea was 0.5 g, and the photoelectric conversion efficiency of 7.58% was obtained. 2) TiO2 nanoparticles doped with rare earth ions were prepared by hydrothermal method. The optimal addition of rare earth nitrate was 0.05g rare earth nitrate in 1g P25. La (NO3) _ 3, ce (NO3) _ 3, Sm (NO3) _ 3 were selected to doping nano-TiO2 particles, and sensitized by different dyes N719 and porphyrin. The effect of down-conversion luminescence of rare earth ions on the photoelectrical properties of dye-sensitized solar cells was further proved from the point of view of increasing photocurrent density, and 6.43% (N719 dye-sensitized) was obtained, respectively. 3.62% (porphyrin dye sensitized) conversion efficiency. 3) the co-doped nano-TiO2 particles were prepared by hydrothermal method with nitrogen element and samarium nitrate. The photoelectric performance of the photoanode assembled cell was tested and the conversion efficiency obtained was not significantly improved compared with the single nitrogen doping and samarium nitrate doping. The experimental results showed that the conversion efficiency of the photoanode assembled cell was higher than that of the single nitrogen doping and samarium nitrate doping. The mechanism shows that both nitrogen doping and samarium doping can improve the absorption of visible light in dye-sensitized solar cells to a certain extent, so there is no synergistic effect between the two.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM914.4

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