当前位置：
X-MOL 学术
›
Adv. Energy Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Propylammonium Chloride Additive for Efficient and Stable FAPbI3 Perovskite Solar Cells
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2021-10-27 , DOI: 10.1002/aenm.202102538 Yong Zhang 1, 2 , Yan Li 1, 3 , Lin Zhang 4 , Hanlin Hu 5 , Zikang Tang 3 , Baomin Xu 1 , Nam‐Gyu Park 2
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2021-10-27 , DOI: 10.1002/aenm.202102538 Yong Zhang 1, 2 , Yan Li 1, 3 , Lin Zhang 4 , Hanlin Hu 5 , Zikang Tang 3 , Baomin Xu 1 , Nam‐Gyu Park 2
Affiliation
|
To achieve high efficiency perovskite solar cells (PSCs) based on α-phase formamidinium lead iodide (FAPbI3), addition of methylammonium chloride (MACl) in the precursor solution is commonly used, mainly because of phase stability and improvement of grain size and crystallinity. However, the instability of MA in the perovskite limits the device long-term stability. In this report, n-propylammonium chloride (PACl) is proposed as an alternative to MACl for more stable and efficient FAPbI3-based PSCs. Perovskite grain size is increased after addition of PACl. Unlike the MA cation, the propylammonium cation passivates the grain boundary rather than being incorporated into the perovskite lattice due to larger ionic size, which minimizes the change in bandgap. Carrier lifetime is significantly increased by more than five times from 405 to 2110 ns with the PACl additive with negligible trap-mediated recombination, while only four times longer carrier lifetime is observed by MACl additive. As a result, a power conversion efficiency over 22.2% is achieved by 20 mol% PACl additive, which is one of the best efficiencies among the MA-free and Br-free PSCs. In addition, stability against moisture is much better for PACl than for MACl due to an in situ formed barrier at the bulk perovskite.
中文翻译：
用于高效稳定 FAPbI3 钙钛矿太阳能电池的丙基氯化铵添加剂
为了实现基于 α 相甲脒碘化铅 (FAPbI 3 ) 的高效钙钛矿太阳能电池 (PSC) ，通常在前体溶液中添加甲基氯化铵 (MACl)，主要是因为相稳定性和晶粒尺寸的改善和结晶度。然而，钙钛矿中 MA 的不稳定性限制了器件的长期稳定性。在这份报告中，正丙基氯化铵 (PACl) 被提议作为 MACl 的替代品，以获得更稳定和高效的 FAPbI 3基于 PSC。添加PACl后钙钛矿晶粒尺寸增加。与 MA 阳离子不同，丙基铵阳离子钝化晶界，而不是由于较大的离子尺寸而被结合到钙钛矿晶格中，从而最大限度地减少了带隙的变化。载流子寿命从 405 ns 到 2110 ns 显着增加了五倍以上，而 MACl 添加剂的陷阱介导的复合可以忽略不计，而 MACl 添加剂仅观察到四倍的载流子寿命。结果，通过 20 mol% 的 PACl 添加剂实现了超过 22.2% 的功率转换效率，这是无 MA 和无 Br PSC 中效率最高的一种。此外，由于在块状钙钛矿上原位形成的阻挡层，PACl 对水分的稳定性比 MACl 好得多。
更新日期：2021-12-16
中文翻译：
用于高效稳定 FAPbI3 钙钛矿太阳能电池的丙基氯化铵添加剂
为了实现基于 α 相甲脒碘化铅 (FAPbI 3 ) 的高效钙钛矿太阳能电池 (PSC) ，通常在前体溶液中添加甲基氯化铵 (MACl)，主要是因为相稳定性和晶粒尺寸的改善和结晶度。然而，钙钛矿中 MA 的不稳定性限制了器件的长期稳定性。在这份报告中，正丙基氯化铵 (PACl) 被提议作为 MACl 的替代品，以获得更稳定和高效的 FAPbI 3基于 PSC。添加PACl后钙钛矿晶粒尺寸增加。与 MA 阳离子不同，丙基铵阳离子钝化晶界，而不是由于较大的离子尺寸而被结合到钙钛矿晶格中，从而最大限度地减少了带隙的变化。载流子寿命从 405 ns 到 2110 ns 显着增加了五倍以上，而 MACl 添加剂的陷阱介导的复合可以忽略不计，而 MACl 添加剂仅观察到四倍的载流子寿命。结果，通过 20 mol% 的 PACl 添加剂实现了超过 22.2% 的功率转换效率，这是无 MA 和无 Br PSC 中效率最高的一种。此外，由于在块状钙钛矿上原位形成的阻挡层，PACl 对水分的稳定性比 MACl 好得多。
京公网安备 11010802027423号