Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscience and Technology (NCNST) , Beijing 100083, China.
Advanced Material and Technology Institute, University of Science and Technology , Beijing 100083, China.
ACS Appl Mater Interfaces. 2017 Mar 22;9(11):9785-9794. doi: 10.1021/acsami.7b00726. Epub 2017 Mar 8.
ZnO has been demonstrated to be a promising candidate to fabricate high efficiency perovskite solar cells (PSCs) in terms of its better electron extraction and transport properties. However, the inability of synthesis of ZnO nanoparticles (NPs) with minimal surface defects and agglomeration remains a great challenge hindering the fabrication of highly efficient PSCs. In this work, highly crystalline and agglomeration-free ZnO NPs with controlled size were synthesized through a facile solvothermal method. Such ZnO NPs were applied in the fabrication of meso-structured PSCs. The solar cells with ∼40 nm ZnO NPs exhibit the highest power conversion efficiency (PCE) of 15.92%. Steady-state and time-resolved photoluminescence measurements revealed the faster injection and lower charge recombination at the interface of ∼40 nm ZnO NPs and perovskite, resulting in significantly enhanced J and V.
氧化锌（ZnO）由于其更好的电子提取和传输性能，已被证明是制备高效钙钛矿太阳能电池（PSCs）的有前途的候选材料。然而，合成具有最小表面缺陷和团聚的氧化锌纳米粒子（NPs）的能力仍然是一个巨大的挑战，阻碍了高效 PSCs 的制备。在这项工作中，通过简便的溶剂热法合成了具有高结晶度和无团聚且尺寸可控的 ZnO NPs。将这些 ZnO NPs 应用于介孔结构 PSCs 的制备中。具有约 40nm ZnO NPs 的太阳能电池表现出最高的功率转换效率（PCE）为 15.92%。稳态和时间分辨光致发光测量表明，在约 40nm ZnO NPs 和钙钛矿之间的界面处，注入速度更快，电荷复合率更低，从而显著提高了 J 和 V。
