Kuan Chun-Hsiao, Liao Tzu-Shen, Narra Sudhakar, Tsai Yi-Wei, Lin Jhih-Min, Chen Guan-Ruei, Diau Eric Wei-Guang
Department of Applied Chemistry and Institute of Molecular Science, National Yang Ming Chiao Tung University, 1001 Ta-Hseuh Road, Hsinchu 300093, Taiwan.
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan.
J Phys Chem Lett. 2024 Aug 1;15(30):7763-7769. doi: 10.1021/acs.jpclett.4c01695. Epub 2024 Jul 24.
Tin perovskite solar cells (TPSCs) were developed by adding the co-cations acetamidinium (AC) and rubidium (Rb) in varied proportions based on the FASnI structure (E1). We found that adding 10% AC and 3% Rb can optimize the device (E1AC10Rb3) to attain an efficiency of power conversion of 14.5% with great shelf- and light-soaking stability. The films at varied AC and Rb proportions were characterized using XPS, SEM, AFM, GIWAXS, XRD, TOPAS, TOF-SIMS, UV-vis, PL, TCSPC, and femtosecond TAS techniques to show the excellent optoelectronic properties of the E1AC10Rb3 film in comparison to those of the other films. AC was found to have the effect of passivating the vacancy defects on the surface and near the bottom of the film, while Rb plays a pivotal role in passivating the bottom interface between perovskite and PEDOT:PSS. Therefore, the E1AC10Rb3 device with a band gap of 1.43 eV becomes a promising candidate as a narrow band gap device for tandem lead-free perovskite solar cell development.
通过在基于FASnI结构（E1）的基础上按不同比例添加共阳离子乙脒（AC）和铷（Rb），开发出了锡基钙钛矿太阳能电池（TPSCs）。我们发现，添加10%的AC和3%的Rb可以优化器件（E1AC10Rb3），使其实现14.5%的功率转换效率，并具有出色的储存和光浸泡稳定性。使用XPS、SEM、AFM、GIWAXS、XRD、TOPAS、TOF-SIMS、UV-vis、PL、TCSPC和飞秒TAS技术对不同AC和Rb比例的薄膜进行了表征，结果表明E1AC10Rb3薄膜与其他薄膜相比具有优异的光电性能。发现AC具有钝化薄膜表面和底部附近空位缺陷的作用，而Rb在钝化钙钛矿与PEDOT:PSS之间的底部界面方面起着关键作用。因此，带隙为1.43 eV的E1AC10Rb3器件成为用于串联无铅钙钛矿太阳能电池开发的窄带隙器件的有前景候选者。
