22.8%-Efficient single-crystal mixed-cation inverted perovskite solar cells with a near-optimal bandgap,Energy & Environmental Science

当前位置： X-MOL 学术 › Energy Environ. Sci. › 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.)

22.8%-Efficient single-crystal mixed-cation inverted perovskite solar cells with a near-optimal bandgap
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2021-2-23 , DOI: 10.1039/d0ee03839c
Abdullah Y. Alsalloum _{1,

2,

3,

4} , Bekir Turedi _{1,

2,

3,

4} , Khulud Almasabi _{1,

2,

3,

4} , Xiaopeng Zheng _{1,

2,

3,

4} , Rounak Naphade _{1,

2,

3,

4} , Samuel D. Stranks _{5,

6,

7,

8,

9} , Omar F. Mohammed _{1,

2,

3,

4} , Osman M. Bakr _{1,

2,

3,

4}

Affiliation

Expanding the near-infrared (NIR) response of perovskite materials to approach the ideal bandgap range (1.1–1.4 eV) for single-junction solar cells is an attractive step to unleash the full potential of perovskite solar cells (PSCs). However, polycrystalline formamidinium lead triiodide (FAPbI₃)-based absorbers, used in record-efficiency PSCs, currently offer the smallest bandgap that can be achieved for lead-halide perovskite thin films (>100 meV larger than the optimal bandgap). Here, we uncover that utilizing a mixed-cation single-crystal absorber layer (FA_0.6MA_0.4PbI₃) is capable of redshifting the external quantum efficiency (EQE) band edge past that of FAPbI₃ polycrystalline solar cells by about 50 meV – only 60 meV larger than that of the top-performing photovoltaic material, GaAs – leading to EQE-verified short-circuit current densities exceeding 26 mA cm⁻² without sacrificing the open-circuit voltage (V_OC), and therefore, yielding power conversion efficiencies of up to 22.8%. These figures of merit not only set a new record for SC-PSCs and are among the highest reported for inverted-structured-PSCs, but also offer an avenue for lead halide PSCs to advance their performance toward their theoretical Shockley–Queisser Limit potential.

中文翻译：

具有接近最佳带隙的22.8％高效单晶混合阳离子倒钙钛矿太阳能电池

将钙钛矿材料的近红外（NIR）响应扩展到接近单结太阳能电池的理想带隙范围（1.1–1.4 eV）是释放钙钛矿太阳能电池（PSC）的全部潜力的有吸引力的一步。但是，用于记录效率PSC的基于多晶甲form鎓三碘化铅（FAPbI ₃）的吸收剂目前提供的卤化钙钛矿铅薄膜可实现的最小带隙（大于最佳带隙大于100 meV）。在这里，我们发现利用混合阳离子单晶吸收层（FA _0.6 MA _0.4 PbI ₃）能够使外部量子效率（EQE）能带边缘发生红移，使其超过FAPbI _3的边缘。多晶太阳能电池约50 meV –仅比性能最高的光伏材料GaAs大60 meV –导致EQE验证的短路电流密度超过26 mA cm ^-2而不牺牲开路电压（V _OC），因此产生高达22.8％的功率转换效率。这些性能指标不仅为SC-PSC创下了新记录，而且是反向结构PSC的最高记录，而且为卤化铅PSC使其性能朝着其Shockley-Queisser极限理论值的方向发展提供了途径。

更新日期：2021-03-05

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11