Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo , Toledo, Ohio 43606, United States.
Ordered Matter Science Research Center, Southeast University , Nanjing 211189, China.
J Am Chem Soc. 2016 Sep 28;138(38):12360-3. doi: 10.1021/jacs.6b08337. Epub 2016 Sep 19.
Mixed tin (Sn)-lead (Pb) perovskites with high Sn content exhibit low bandgaps suitable for fabricating the bottom cell of perovskite-based tandem solar cells. In this work, we report on the fabrication of efficient mixed Sn-Pb perovskite solar cells using precursors combining formamidinium tin iodide (FASnI3) and methylammonium lead iodide (MAPbI3). The best-performing cell fabricated using a (FASnI3)0.6(MAPbI3)0.4 absorber with an absorption edge of ∼1.2 eV achieved a power conversion efficiency (PCE) of 15.08 (15.00)% with an open-circuit voltage of 0.795 (0.799) V, a short-circuit current density of 26.86(26.82) mA/cm(2), and a fill factor of 70.6(70.0)% when measured under forward (reverse) voltage scan. The average PCE of 50 cells we have fabricated is 14.39 ± 0.33%, indicating good reproducibility.
具有高锡含量的混合锡 (Sn)-铅 (Pb) 钙钛矿具有适合制造钙钛矿串联太阳能电池底部电池的低能带隙。在这项工作中，我们报告了使用组合甲脒碘化锡 (FASnI3) 和碘化甲基铵 (MAPbI3) 前体制备高效混合 Sn-Pb 钙钛矿太阳能电池。使用具有 ∼1.2 eV 吸收边缘的 (FASnI3)0.6(MAPbI3)0.4 吸收剂制造的性能最佳的电池实现了 15.08(15.00)%的功率转换效率 (PCE)，开路电压为 0.795(0.799)V，短路电流密度为 26.86(26.82)mA/cm(2)，当在正向 (反向) 电压扫描下测量时填充因子为 70.6(70.0)%。我们制造的 50 个电池的平均 PCE 为 14.39 ± 0.33%，表明具有良好的重现性。
