标题： 脉冲激光沉积法制备的致密TiO$_2$层在有机金属三卤化物钙钛矿太阳能电池中的应用 显示英文标题

标题： Application of compact TiO$_2$ layer fabricated by pulsed laser deposition in organometal trihalide perovskite solar cells

摘要： 有机金属三卤化物钙钛矿太阳能电池近年来发展迅速，由于其高光电转换效率和低成本而受到广泛关注。脉冲激光沉积（PLD）是一种广泛采用的技术，用于薄膜的制备，特别是氧化物薄膜。通过该技术，可以方便且准确地控制薄膜的厚度和成分。在钙钛矿太阳能电池的结构中，TiO$_2$层作为n型半导体用于阻挡空穴并传输电子到电极，这对于整个器件的性能至关重要。我们将PLD技术引入TiO$_2$层的制备中。与常见的旋涂法相比，该技术制备的TiO$_2$层更薄且更致密。通过PLD方法制备了厚度优化为32纳米的致密TiO$_2$（c-TiO$_2$）层，并实现了基于MAPbI$_3$的太阳能电池器件的最高效率13.95%。 显示英文摘要

摘要： Organometal trihalide perovskite solar cells have been rapidly developed and attracted much attention in recent years due to their high photoelectric conversion efficiency and low cost. Pulsed laser deposition (PLD) is a widely adopted technology which is used in the preparation of thin films, especially oxide thin films. With this technology, the thickness and composition of films can be conveniently and accurately controlled. In the structure of perovskite solar cells, TiO$_2$ layer working as the n-type semiconductor is used to block holes and transport electrons into electrode, which is crucial for the performance of whole devices. We introduced the PLD technique into preparation of TiO$_2$ layer. In comparison with common spin coating method, TiO$_2$ layer prepared by this technique is ultrathin and more compact. Compact TiO$_2$ (c-TiO$_2$) layers with optimized thickness of 32 nm have been prepared by the PLD method and the highest efficiency of 13.95 % for the MAPbI$_3$-based solar cell devices has been achieved.