Gowdru Swathi M, Lin Jou-Chun, Wang Szu-Tan, Chen Yi-Chia, Wu Kuan-Chang, Jiang Cheng-Nan, Chen Yu-Dian, Li Shao-Sian, Chang Yuan Jay, Wang Di-Yan
Department of Chemistry, Tunghai University, Taichung 40704, Taiwan.
Department of Materials and Mineral Resources Engineering, Institute of Materials Science and Engineering, National Taipei University of Technology, Taipei 10608, Taiwan.
Nanomaterials (Basel). 2022 May 26;12(11):1816. doi: 10.3390/nano12111816.
Various types of 2D organic-inorganic perovskite solar cells have been developed and investigated due to better electron transport behavior and environmental stability. Controlling the formation of phases in the 2D perovskite films has been considered to play an important role in influencing the stability of perovskite materials and their performance in optoelectronic applications. In this work, Lewis base urea was used as an effective additive for the formation of 2D Ruddlesden-Popper (RP) perovskite (BA)(MA)PbI thin film with mixed phases (n = 2~4). The detailed structural morphology of the 2D perovskite thin film was investigated by in situ X-ray diffraction (XRD), grazing-incidence small-angle X-ray scattering (GISAXS) and photoluminescence mapping. The results indicated that the urea additive could facilitate the formation of 2D RP perovskite thin film with larger grain size and high crystallinity. The 2D RP perovskite thin films for solar cells exhibited a power conversion efficiency (PCE) of 7.9% under AM 1.5G illumination at 100 mW/cm.
由于具有更好的电子传输行为和环境稳定性，各种类型的二维有机-无机钙钛矿太阳能电池已被开发和研究。控制二维钙钛矿薄膜中的相形成被认为在影响钙钛矿材料的稳定性及其在光电应用中的性能方面起着重要作用。在这项工作中，路易斯碱尿素被用作一种有效的添加剂，用于形成具有混合相（n = 2~4）的二维Ruddlesden-Popper（RP）钙钛矿（BA）（MA）PbI薄膜。通过原位X射线衍射（XRD）、掠入射小角X射线散射（GISAXS）和光致发光映射研究了二维钙钛矿薄膜的详细结构形态。结果表明，尿素添加剂可以促进形成具有更大晶粒尺寸和高结晶度的二维RP钙钛矿薄膜。用于太阳能电池的二维RP钙钛矿薄膜在100 mW/cm的AM 1.5G光照下表现出7.9%的功率转换效率（PCE）。
