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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Gradient band structure: high performance perovskite solar cells using poly(bisphenol A anhydride-co-1,3-phenylenediamine)
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Gradient band structure: high performance perovskite solar cells using poly(bisphenol A anhydride-co-1,3-phenylenediamine)

机译:梯度带结构:使用聚(双酚A酸酐-CO-1,3-苯二胺的高性能Perovskite太阳能电池

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摘要

Surface passivation is a critical factor for improving the photovoltaic performance of perovskite solar cells. However, more robust principle investigations are required to build effective passivation strategies enabling high-performance perovskite solar cells. Here, it is demonstrated that a non-reactive organic polymer induces band-bending at the perovskite surface through a passivation effect, furthermore suppressing Pb(0)formation at the perovskite surface. Consequently, the photovoltaic performance and stability of the perovskite solar cells can be improved. The key findings show that the polymer passivation layer can control the Fermi-level at the perovskite surface, which changes the band structure at the perovskite surface and affects carrier dynamics by suppressing non-radiative pathways. Moreover, the organic polymer can prevent degradation of the perovskite surface. By using the passivating layer, the open circuit voltage improves from 1.046 to 1.100 V, the photoconversion efficiency exceeds 21%, and the stability of the perovskite solar cells is substantially improved. The organic polymer poly(bisphenol A anhydride-co-1,3-phenylenediamine) (PEIm) was used to control the perovskite band structure, and this passivation mechanism is revealed here.
机译:表面钝化是改善钙钛矿太阳能电池的光伏性能的关键因素。然而,需要更强大的原则调查来构建有效的钝化策略,从而实现高性能的钙钛矿太阳能电池。这里,证明非反应性有机聚合物通过钝化效果在钙钛矿表面处诱导带弯曲,此外抑制在钙钛矿表面的Pb(0)形成。因此,可以提高钙钛矿太阳能电池的光伏性能和稳定性。关键发现表明,聚合物钝化层可以控制钙钛矿表面处的费米水平,其改变钙钛矿表面处的带结构,并通过抑制非辐射路径来影响载波动力学。此外,有机聚合物可以防止钙钛矿表面的降解。通过使用钝化层,开路电压从1.046提高到1.100V,光电转换效率超过21%,并且大大提高了钙钛矿太阳能电池的稳定性。有机聚合物聚(双酚A酸酐-CO-1,3-苯二胺)(PEIM)用于控制钙钛矿带结构,并且在此显示这种钝化机制。

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