Department of Electronic Science and Technology, College of Electronic Information and Optical Engineering , Nankai University , Tianjin 300350 , China.
Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin , Tianjin 300350 , China.
ACS Appl Mater Interfaces. 2019 Mar 20;11(11):10689-10696. doi: 10.1021/acsami.9b01843. Epub 2019 Mar 6.
Substrate heating is the most common method for controlling crystallization during spray coating. However, due to poor controllability during substrate heating, the sprayed films have variable thicknesses and rich pores, which limit the efficiency of the device. Here, hot air blowing was applied to spray coating to promote the crystallization of perovskite films under ambient conditions. Upon employing a hot air blowing method that stimulated uniformly distributed nuclei growth, the pinhole-free and thickness-controllable perovskite film was prepared. This enabled more reproducible high-quality perovskite films to achieve a power conversion efficiency of 13.5% and obtain a stabilized power output of >12% in ambient conditions.
基底加热是喷雾涂覆过程中控制结晶的最常用方法。然而，由于基底加热过程的可控性较差，喷涂薄膜的厚度不均匀且富含孔隙，这限制了器件的效率。在这里，热空气吹入被应用于喷雾涂覆，以在环境条件下促进钙钛矿薄膜的结晶。通过采用热空气吹入的方法来刺激均匀分布的核生长，制备出了无针孔且厚度可控的钙钛矿薄膜。这使得更可重现的高质量钙钛矿薄膜实现了 13.5%的功率转换效率，并在环境条件下获得了>12%的稳定功率输出。
