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Improvements in Efficiency and Stability of Perovskite Solar Cells Using a Cesium Chloride Additive
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-06-06 , DOI: 10.1021/acsami.2c07425
Xiaodan Tang 1 , Mengmeng Chen 1 , Lulu Jiang 1 , Miao Li 1 , Guanqi Tang 2 , Hairui Liu 1
Affiliation  

Perovskite films with few defects play a key role in preparing high-performance perovskite solar cells (PSCs). Here, cesium chloride (CsCl) was introduced as a modulator into a perovskite precursor for manipulating the crystallization of perovskite films. By introducing CsCl, dense homogeneous perovskite films with high crystallinity, preferential orientation, and a pure black perovskite phase were prepared. In addition, the carrier lifetime of perovskite films was significantly increased because of the suppressed nonradiative recombination. Correspondingly, the power conversion efficiency (PCE) of small-area devices using CsCl regulation was increased from 20.56 to 22.86%. The 1 cm2 PSCs present a PCE of 21.53%, demonstrating their reliability for mass production. Furthermore, the device showed excellent stability maintaining 93.8% of its initial PCE after 500 h of continuous irradiation. Also, 95.3% of its PCE was kept after storage in ambient air for 2100 h. This study demonstrates that CsCl doping is a reliable way to prepare PSCs for practical applications.

中文翻译:


使用氯化铯添加剂提高钙钛矿太阳能电池的效率和稳定性



缺陷少的钙钛矿薄膜在制备高性能钙钛矿太阳能电池(PSC)中发挥着关键作用。在这里,氯化铯(CsCl)作为调节剂被引入钙钛矿前体中,以操纵钙钛矿薄膜的结晶。通过引入CsCl,制备了具有高结晶度、择优取向和纯黑色钙钛矿相的致密均匀钙钛矿薄膜。此外,由于非辐射复合受到抑制,钙钛矿薄膜的载流子寿命显着增加。相应地,采用CsCl调节的小面积器件的功率转换效率(PCE)从20.56%提高到22.86%。 1 cm 2 PSC 的 PCE 为 21.53%,证明了其大规模生产的可靠性。此外,该器件表现出优异的稳定性,在连续照射 500 小时后仍保持其初始 PCE 的 93.8%。此外,在环境空气中储存2100小时后,其PCE仍保持在95.3%。这项研究表明,CsCl 掺杂是制备用于实际应用的 PSC 的可靠方法。
更新日期:2022-06-06
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