Parida Bhaskar, Yoon Saemon, Kang Dong-Won
School of Energy Systems Engineering, Chung-Ang University, Seoul 06974, Korea.
Nanomaterials (Basel). 2021 Jun 4;11(6):1489. doi: 10.3390/nano11061489.
Materials and processing of transparent electrodes (TEs) are key factors to creating high-performance translucent perovskite solar cells. To date, sputtered indium tin oxide (ITO) has been a general option for a rear TE of translucent solar cells. However, it requires a rather high cost due to vacuum process and also typically causes plasma damage to the underlying layer. Therefore, we introduced TE based on ITO nanoparticles (ITO-NPs) by solution processing in ambient air without any heat treatment. As it reveals insufficient conductivity, Ag nanowires (Ag-NWs) are additionally coated. The ITO-NPs/Ag-NW (0D/1D) bilayer TE exhibits a better figure of merit than sputtered ITO. After constructing CsPbBr perovskite solar cells, the device with 0D/1D TE offers similar average visible transmission with the cells with sputtered ITO. More interestingly, the power conversion efficiency of 0D/1D TE device was 5.64%, which outperforms the cell (4.14%) made with sputtered-ITO. These impressive findings could open up a new pathway for the development of low-cost, translucent solar cells with quick processing under ambient air at room temperature.
透明电极（TEs）的材料和加工是制造高性能半透明钙钛矿太阳能电池的关键因素。迄今为止，溅射氧化铟锡（ITO）一直是半透明太阳能电池背面TE的常用选择。然而，由于真空工艺，其成本相当高，并且通常会对底层造成等离子体损伤。因此，我们通过在环境空气中进行溶液处理且无需任何热处理，引入了基于ITO纳米颗粒（ITO-NPs）的TE。由于其导电性不足，额外涂覆了银纳米线（Ag-NWs）。ITO-NPs/Ag-NW（0D/1D）双层TE表现出比溅射ITO更好的品质因数。构建CsPbBr钙钛矿太阳能电池后，具有0D/1D TE的器件与具有溅射ITO的电池具有相似的平均可见光透过率。更有趣的是，0D/1D TE器件的功率转换效率为5.64%，优于采用溅射ITO制成的电池（4.14%）。这些令人印象深刻的发现可能为开发在室温下的环境空气中快速加工的低成本半透明太阳能电池开辟一条新途径。
