Stable high-efficiency monolithic all-perovskite tandem solar cells enabled by a natural reactive oxygen species scavenger,Energy & Environmental Science

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Stable high-efficiency monolithic all-perovskite tandem solar cells enabled by a natural reactive oxygen species scavenger
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2024-08-14 , DOI: 10.1039/d4ee02754j
Ruitian Sun ₁ , Pengshuai Wang ₁ , Lin Zhang ₁ , Weijun Liu ₂ , Yanjie Wen ₂ , Fan Li ₂ , Zhizhong Ge ₁ , Liang Qiao ₁ , Tao Wang ₁ , Tianshi Ye ₁ , Peijun Ji ₁ , Xudong Yang _{1,

2,

3,

4}

Affiliation

Monolithic tandem solar cells (TSCs) based on metal halide perovskite semiconductors are the prime candidate for the next generation of photovoltaic technologies. Here, we introduce 4-ethenyl-2,6-dimethoxyphenol (canolol, CNL), a natural reactive oxygen species scavenger, to process narrow bandgap perovskite (NBG) subcells with enhanced efficiency and stability. A proton coupled electron transfer reaction between CNL and Sn⁴⁺ is discovered and Sn⁴⁺ is reduced to Sn²⁺. The interaction between CNL and inorganic cations facilitates film crystallization and effective defect passivation in NBG perovskite films. These significantly enhance perovskite oxidation resistance during various stages, including precursor solution preparation, film annealing, and device operation. The resulting single-junction NBG devices achieve a champion power conversion efficiency (PCE) of 23.7% with enhanced stability. Moreover, the resulting all-perovskite tandem solar cells achieved an efficiency of 28.48%, which is certified by a public test center. The encapsulated tandem device retains >90% of its initial efficiency after 750 hours of maximum power point tracking (MPPT) under simulated AM 1.5G illumination.

中文翻译：

由天然活性氧清除剂实现的稳定高效单片全钙钛矿串联太阳能电池

基于金属卤化物钙钛矿半导体的单片串联太阳能电池（TSC）是下一代光伏技术的主要候选者。在这里，我们引入了4-乙烯基-2,6-二甲氧基苯酚（canolol，CNL），一种天然活性氧清除剂，用于处理窄带隙钙钛矿（NBG）子电池，提高了效率和稳定性。发现CNL和Sn ⁴⁺之间的质子耦合电子转移反应并且Sn ⁴⁺被还原为Sn ²⁺ 。 CNL与无机阳离子之间的相互作用促进NBG钙钛矿薄膜的薄膜结晶和有效的缺陷钝化。这些显着增强了钙钛矿在各个阶段的抗氧化性，包括前体溶液制备、薄膜退火和器件操作。由此产生的单结 NBG 器件实现了 23.7% 的冠军功率转换效率 (PCE)，并且稳定性增强。此外，所得的全钙钛矿串联太阳能电池的效率达到了28.48%，并经公共测试中心认证。在模拟 AM 1.5G 照明下进行 750 小时的最大功率点跟踪 (MPPT) 后，封装串联器件仍保留 >90% 的初始效率。

更新日期：2024-08-14

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