Meyer Edson L, Agoro Mojeed A
Fort Hare Institute of Technology, University of Fort Hare, Private Bag X1314, Alice, Eastern Cape 5700, South Africa.
Department of Chemistry, University of Fort Hare, Private Bag X1314, Alice, Eastern Cape 5700, South Africa.
ACS Omega. 2024 Aug 25;9(36):37891-37900. doi: 10.1021/acsomega.4c04226. eCollection 2024 Sep 10.
We report on the passivation of titanium oxide with FeS from three molecular precursors with tin sulfide (SnS) photon absorbers that were fabricated and assembled to increase the performance of quantum dot sensitized solar cells (QDSSCs). FeS was loaded on the TiO surfaces, and then, SnS photosensitizer was deposited to form a ternary modified device. The morphology, structural structure, size distribution, chemical composition, and conversion efficiency were explored by FE-SEM, XRD, TEM, UV-vis, EDS, EIS, and J-V analysis. The CV, LSV, and stability state were also investigated for migration and separation of photogenerated charge carriers in the as-prepared cells labeled F-S-1, F-S-2, and F-S-3. The FE-SEM image of the F-S-2 cell is composed of FeS interconnected with SnS and FeS, which provided paths for electron movement compared with the F-S-1 and F-S-3 devices. The semicircle for the F/S-1 and F/S-3 solar device diameters illustrates that the high-medium frequency regain is greater than that of the F/S-2 device, implying that both cells have charge-transfer impedances and lower contact. Apparently, the F/S-2 device shows superior catalytic activity, which can be linked to the hybridization of TiO/FeS/SnS due to the synergistic effect. The F/S-2/S-2l has a maximum efficiency η of 6.73% in comparison to F/S-1 and F/S-3, which have the same conversion efficiency of 3.82%. The results of the F/S-2 device follow a similar trend to the chronoamperometry analysis, CV, and LSV results from this study.
我们报道了用三种分子前驱体的硫化铁对二氧化钛进行钝化处理，并与硫化锡（SnS）光吸收剂相结合，制备并组装了量子点敏化太阳能电池（QDSSCs）以提高其性能。硫化铁负载在TiO表面，然后沉积SnS光敏剂以形成三元改性器件。通过场发射扫描电子显微镜（FE-SEM）、X射线衍射（XRD）、透射电子显微镜（TEM）、紫外可见光谱（UV-vis）、能谱分析（EDS）、电化学阻抗谱（EIS）和电流-电压（J-V）分析来探究其形貌、结构、尺寸分布、化学成分和转换效率。还对标记为F-S-1、F-S-2和F-S-3的制备好的电池中光生电荷载流子的迁移和分离进行了循环伏安法（CV）、线性扫描伏安法（LSV）和稳定性状态研究。F-S-2电池的FE-SEM图像由与SnS和FeS相互连接的FeS组成，与F-S-1和F-S-3器件相比，这为电子移动提供了路径。F/S-1和F/S-3太阳能器件直径的半圆表明，高-中频恢复大于F/S-2器件，这意味着这两个电池都有电荷转移阻抗且接触性较低。显然，F/S-2器件表现出优异的催化活性，这可能归因于TiO/FeS/SnS的杂化作用产生的协同效应。与转换效率均为3.82%的F/S-1和F/S-3相比，F/S-2/S-2l的最大效率η为6.73%。F/S-2器件的结果与本研究中的计时电流法分析、CV和LSV结果呈现相似趋势。
