Pin-hole free MAPb0.75 Sn0.25 (I0.5 Br0.5 ) 3 films spin casted without anti- solvent by adding MAAc additive to perovskite ink
Pin-hole free MAPb0.75 Sn0.25 (I0.5 Br0.5 ) 3 films spin casted without anti- solvent by adding MAAc additive to perovskite ink
复制标题
DOI：
10.24084/repqj20.284
复制
发表时间：
2022-09
影响因子：
--
通讯作者：
C. Howlader;N. Khakurel;D. W. Amyx;W. Geerts;G. Gibson;M. Chen
中科院分区：
文献类型：
--
作者：
C. Howlader;N. Khakurel;D. W. Amyx;W. Geerts;G. Gibson;M. Chen
为了开始锡（Sn）基钙钛矿材料的结晶，抗溶剂处理是有用的技术。但是反溶剂的使用增加了沉积过程的复杂性，从而阻碍了在大规模生产过程中的适用性。在这里，我们开发了一种无反溶剂MAPb0.75Sn0.25（I0.50Br0.50）3钙钛矿薄膜沉积方法的基础上的一步旋涂工艺。将0 - 100摩尔%的乙酸甲基铵（MAAc）添加到前体油墨中允许连续膜的沉积。由具有小于60摩尔% MAAc的油墨浇铸的膜显示出针孔并且是粗糙的。从60或更多摩尔%的MAAc添加剂可以获得良好的结晶和无针孔的钙钛矿薄膜。这些结果通过XRD、AFM和SEM测量得到证实。MAPb0.75Sn0.25（I0.50Br0.50）3具有宽的带隙，并且目前被考虑用于串联太阳能电池和水下太阳能电池。
To start the crystallization of the tin (Sn) based perovskite materials, anti-solvent treatment is a useful technique. But the use of anti-solvents increases the complexity of the deposition process thus hinders the applicability in mass production processes. Here we have developed an anti-solvent free MAPb0.75Sn0.25(I0.50Br0.50)3 perovskite thin film deposition method based on a one step spin coating process. Addition of 0 - 100 mol% of methylammonium acetate (MAAc) to the precursor ink allows for the deposition of continuous films. Films casted from ink with less than 60 mol% MAAc show pinholes and are rough. A decent crystalline and pin-hole free perovskite thin film can be obtained from 60 or more mol% MAAc additive. These results are confirmed by XRD, AFM and SEM measurements. MAPb0.75Sn0.25(I0.50Br0.50)3 has a wide bandgap and is currently being considered for applications in tandem solar cells and under water solar cells.