Rajamanickam N, Soundarrajan P, Vendra Venkat K, Jasinski Jacek B, Sunkara Mahendra K, Ramachandran K
Conn Center for Renewable Research and Department of Chemical Engineering, University of Louisville, Louisville, KY 40292, USA and School of Physics, Madurai Kamaraj University, Madurai 625021, TN, India.
School of Physics, Madurai Kamaraj University, Madurai 625021, TN, India.
Phys Chem Chem Phys. 2016 Mar 28;18(12):8468-78. doi: 10.1039/c5cp06754e.
Cubic perovskite BaSnO3 (BSO) is an important photoelectron transporting material due to its electronic structure that competes with TiO2 in dye-sensitized solar cells (DSCs). Separately, BSO/TiCl4 treated and BSO/scattering layer photoelectrodes have been used in DSCs that effectively increase the photoexcited charge carriers collection resulting in superior photovoltaic performance. In the present work, the different TiCl4 treatment time (1, 3 and 5 min), different scattering layer (tetragonal anatase TiO2 and hexagonal wurtzite ZnO) and different combinations thereof are successfully used on BSO nanocuboids/nanoparticle morphological structure photoelectrodes, and then we systematically inspected their performance in DSCs. Under the optimized conditions, a power conversion efficiency (PCE) of 3.88% is obtained by a BSO/TiCl4 treated photoanode. Furthermore, the BSO photoanodes made using a scattering layer such as anatase TiO2 and hexagonal ZnO i.e., BSO/anatase TiO2 and BSO/hexagonal ZnO, exhibited PCEs of 1.14% and 1.25% respectively. In the end, one of the highest PCEs (5.68%) was achieved using BSO/TiCl4 treated/TiO2 scattering layer photoanode. Another photoelectrode such as BSO/TiCl4 treated/ZnO scattering layer exhibited a PCE of 4.28% that is also higher than the BSO/TiCl4 treated/BSO scattering layer photoanodes. Electron lifetime versus current density studies illustrate the stability of the BSO photoelectrode in DSCs. From the observed results, it is realized that BSO is one of the most important future technological materials.
立方钙钛矿BaSnO3（BSO）因其电子结构在染料敏化太阳能电池（DSC）中可与TiO2相媲美，是一种重要的光电子传输材料。另外，经BSO/TiCl4处理的和具有散射层的BSO光电极已用于DSC中，可有效提高光激发电荷载流子的收集效率，从而获得优异的光伏性能。在本工作中，不同的TiCl4处理时间（1、3和5分钟）、不同的散射层（四方锐钛矿TiO2和六方纤锌矿ZnO）及其不同组合被成功应用于BSO纳米立方体/纳米颗粒形态结构的光电极上，然后我们系统地研究了它们在DSC中的性能。在优化条件下，经BSO/TiCl4处理的光阳极的功率转换效率（PCE）达到3.88%。此外，使用诸如锐钛矿TiO2和六方ZnO等散射层制成的BSO光阳极，即BSO/锐钛矿TiO2和BSO/六方ZnO，其PCE分别为1.14%和1.25%。最后，使用经BSO/TiCl4处理/TiO2散射层的光阳极实现了最高PCE之一（5.68%）。另一种光电极，如经BSO/TiCl4处理/ZnO散射层的光电极，其PCE为4.28%，也高于经BSO/TiCl4处理/BSO散射层的光阳极。电子寿命与电流密度的研究表明了BSO光电极在DSC中的稳定性。从观察结果可知，BSO是未来最重要的技术材料之一。
