Performance optimization of dye-sensitized solar cells by gradient-ascent architecture of SiO2@Au@TiO2 microspheres embedded with Au nanoparticles
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2019年第4期
论文作者：Mingyue Li Na Yuan Yiwen Tang Ling Pei Yongdan Zhu Jiaxian Liu Lihua Bai Meiya Li
文章页码：604 - 609
摘 要：Highly homogeneous, well dispersed SiO2@Au@TiO2（SAT） microspheres decorated with Au nanoparticles（AuNPs） were prepared and incorporated into the photoanode with an optimized concentration gradientascent. The effects of SAT microspheres and the gradient-ascent architecture on the light absorption and the photoelectric conversion efficiency（PCE） of the dye-sensitized solar cells（DSSCs） were investigated.Studies indicate that the introduction of SAT microspheres and the gradient-ascent architecture in the photoanode significantly enhance the light scattering and harvesting capability of the photoanode. The DSSC with the optimized SAT gradient-ascent photoanode has the maximum short circuit current density(Jsc) of 17.7 mA cm-2 and PCE of 7.75%, remarkably higher than those of the conventional DSSC by 23.7%and 28.0%, respectively. This significantly enhancement of the performance of the DSSC can be attributed to the excellent light reflection/scattering of SAT, the localized surface plasma resonance（LSPR） effect of AuNPs within the microspheres, and the gradient-ascent architecture of SAT microspheres inside the photoanode. This study demonstrates that the tri-synergies of the scattering of SAT microspheres, the LSPR of AuNPs and the gradient-ascent architecture can effectively improve the PCE of DSSC.
Mingyue Li1，Na Yuan1，Yiwen Tang2，Ling Pei3，Yongdan Zhu4，Jiaxian Liu1，Lihua Bai1，Meiya Li1
1. School of Physics and Technology,The Key Laboratory of Artificial Micro/Nano Structures of Ministry of Education,Wuhan University2. College of Physical Science and Technology,Central China Normal University3. School of Science,Hubei University of Technology4. School of Information Engineering,Hubei University for Nationalities
摘 要：Highly homogeneous, well dispersed SiO2@Au@TiO2（SAT） microspheres decorated with Au nanoparticles（AuNPs） were prepared and incorporated into the photoanode with an optimized concentration gradientascent. The effects of SAT microspheres and the gradient-ascent architecture on the light absorption and the photoelectric conversion efficiency（PCE） of the dye-sensitized solar cells（DSSCs） were investigated.Studies indicate that the introduction of SAT microspheres and the gradient-ascent architecture in the photoanode significantly enhance the light scattering and harvesting capability of the photoanode. The DSSC with the optimized SAT gradient-ascent photoanode has the maximum short circuit current density(Jsc) of 17.7 mA cm-2 and PCE of 7.75%, remarkably higher than those of the conventional DSSC by 23.7%and 28.0%, respectively. This significantly enhancement of the performance of the DSSC can be attributed to the excellent light reflection/scattering of SAT, the localized surface plasma resonance（LSPR） effect of AuNPs within the microspheres, and the gradient-ascent architecture of SAT microspheres inside the photoanode. This study demonstrates that the tri-synergies of the scattering of SAT microspheres, the LSPR of AuNPs and the gradient-ascent architecture can effectively improve the PCE of DSSC.
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