High-Efficiency AgInS2-Modified ZnO Nanotube Array Photoelectrodes for All-Solid-State Hybrid Solar Cells

作者：Jianhua Han, Zhifeng Liu, Keying Guo, Jing Ya, Yufeng Zhao, Xueqi Zhang, Tiantian Hong, Junqi Liu · 发表于：ACS Applied Materials & Interfaces · 年份：2014 · DOI：10.1021/am5047813 · 被引用次数：55 · 研究领域：Advanced Photocatalysis Techniques、TiO2 Photocatalysis and Solar Cells、Quantum Dots Synthesis And Properties

Highly ordered AgInS2-modified ZnO nanoarrays were fabricated via a low-cost hydrothermal chemical method, and their application as all-solid-state solar cells was also tested. A sensitizer and a buffer layer were developed around the surface of ZnO nanotubes in the preparation process, and this method is easily be manipulated to produce uniform structure. In this structure, the ZnO served as direct electron transport path, the ZnS as the buffer layer, and the ternary sensitizer AgInS2 as absorber and outer shell. The novel all-solid-state hybrid solar cells (ITO/ZnO/ZnS/AgInS2/P3HT/Pt) showed improved short-circuit current density (Jsc) of 7.5 mA/cm(2), open-circuit voltage (Voc) of 512 mV, giving rise to a power conversion efficiency of 2.11%, which is the relatively highest value ever reported for ZnO-based all-solid-state hybrid solar cells. This better result is attributed to the improved absorption spectrum, high speed of photoinduced charge transmission velocity, and appropriate gradient energy gap structure, which implies a promising application in all-solid-state solar cells.