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Efficient Ideal-Bandgap Tin–Lead Alloyed Inorganic Perovskite Solar Cells Enabled by Structural Dimension Engineering
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2022-07-19 , DOI: 10.1002/adom.202200891
Siyuan Huang, Chun-Hsiao Kuan, Yue Tian, Xu Chen, Zeng Chen, Cheng-Hung Hou, Xuehui Xu, Xiangyang Tang, Jing-Jong Shyue, Haiming Zhu, Tingming Jiang, Yang (Michael) Yang
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2022-07-19 , DOI: 10.1002/adom.202200891
Siyuan Huang, Chun-Hsiao Kuan, Yue Tian, Xu Chen, Zeng Chen, Cheng-Hung Hou, Xuehui Xu, Xiangyang Tang, Jing-Jong Shyue, Haiming Zhu, Tingming Jiang, Yang (Michael) Yang
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Inorganic tin–lead alloyed perovskite solar cells with optimal bandgap have gained increasing attention because of their higher theoretical efficiency limit, inherently robust stability, and potentials in all-inorganic perovskite tandems. However, their efficiency has far lagged from their Pb-based counterparts owing to some intractable problems such as poor crystallization and facile Sn2+ oxidation. Here, a small amount of 2D perovskite PEAPb0.7Sn0.3I4 is utilized to regulate the crystallization process of 3D CsPb0.7Sn0.3I3 based on the temperature-gradient annealing method. The X-ray diffraction results show that a stable intermediate phase composed of 3D perovskite seeds and 2D phases is formed under a lower annealing temperature of 50 °C, and the pre-crystallized 3D perovskites can promote the subsequent crystallization upon 80 °C annealing to attain high quality film. It is interesting that the 2D perovskite phase is ultimately mainly located between the 3D perovskite phase and hole transport layer as revealed by the time of flight-secondary ion mass spectrometry. The resulting perovskite exhibits a lower extent of non-radiative recombination and better stability. Consequently, the device achieves a champion efficiency of 14.6% setting a new record for inorganic tin-lead perovskite solar cells (PSCs). This work sheds more light on the future progress of inorganic tin-lead PSC.
中文翻译:
结构尺寸工程实现的高效理想带隙锡铅合金无机钙钛矿太阳能电池
具有最佳带隙的无机锡铅合金钙钛矿太阳能电池因其更高的理论效率极限、固有的稳健稳定性以及在全无机钙钛矿串联中的潜力而受到越来越多的关注。然而,由于一些棘手的问题,如结晶差和易氧化的Sn 2+ ,它们的效率远远落后于基于 Pb 的同类产品。这里,使用少量的 2D 钙钛矿 PEAPb 0.7 Sn 0.3 I 4来调节 3D CsPb 0.7 Sn 0.3 I 3的结晶过程基于温度梯度退火法。X 射线衍射结果表明,在 50 ℃的较低退火温度下,形成了由 3D 钙钛矿晶种和 2D 相组成的稳定中间相,预结晶的 3D 钙钛矿在 80 ℃退火后可促进后续结晶至获得高质量的电影。有趣的是,2D 钙钛矿相最终主要位于 3D 钙钛矿相和空穴传输层之间,如飞行时间-二次离子质谱法所示。所得钙钛矿表现出较低程度的非辐射复合和更好的稳定性。因此,该器件实现了 14.6% 的冠军效率,创造了无机锡铅钙钛矿太阳能电池 (PSC) 的新纪录。
更新日期:2022-07-19
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
结构尺寸工程实现的高效理想带隙锡铅合金无机钙钛矿太阳能电池
具有最佳带隙的无机锡铅合金钙钛矿太阳能电池因其更高的理论效率极限、固有的稳健稳定性以及在全无机钙钛矿串联中的潜力而受到越来越多的关注。然而,由于一些棘手的问题,如结晶差和易氧化的Sn 2+ ,它们的效率远远落后于基于 Pb 的同类产品。这里,使用少量的 2D 钙钛矿 PEAPb 0.7 Sn 0.3 I 4来调节 3D CsPb 0.7 Sn 0.3 I 3的结晶过程基于温度梯度退火法。X 射线衍射结果表明,在 50 ℃的较低退火温度下,形成了由 3D 钙钛矿晶种和 2D 相组成的稳定中间相,预结晶的 3D 钙钛矿在 80 ℃退火后可促进后续结晶至获得高质量的电影。有趣的是,2D 钙钛矿相最终主要位于 3D 钙钛矿相和空穴传输层之间,如飞行时间-二次离子质谱法所示。所得钙钛矿表现出较低程度的非辐射复合和更好的稳定性。因此,该器件实现了 14.6% 的冠军效率,创造了无机锡铅钙钛矿太阳能电池 (PSC) 的新纪录。