Ligand Engineering Enables Efficient Pure Red Tin-Based Perovskite Light-Emitting Diodes,Angewandte Chemie International Edition

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Ligand Engineering Enables Efficient Pure Red Tin-Based Perovskite Light-Emitting Diodes
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2023-10-27 , DOI: 10.1002/anie.202312728
Wenhao Bai ₁ , Mingming Liang ₁ , Tongtong Xuan _{1,

2} , Ting Gong ₁ , Liang Bian ₃ , Huili Li ₄ , Rong-Jun Xie _{1,

2,

5}

Affiliation

The performance of eco-friendly PEA₂SnI₄ perovskite light-emitting diodes (PeLEDs) lags far behind that of lead-based PeLEDs. We demonstrated a ligand engineering strategy that uses GSH as a surface ligand to strongly interact with I⁻ and Sn²⁺ in perovskites, which thus reduces the film crystallization rate and suppresses the oxidation of Sn²⁺ ions. Pure red PeLEDs based on the modified PEA₂SnI₄ achieve a record EQE_max of 9.32 %.

中文翻译：

配体工程实现高效纯红锡基钙钛矿发光二极管

环保型PEA ₂ SnI ₄钙钛矿发光二极管（PeLED）的性能远远落后于铅基PeLED。我们展示了一种配体工程策略，使用GSH作为表面配体与钙钛矿中的I ^-和Sn ²⁺强烈相互作用，从而降低薄膜结晶速率并抑制Sn ²⁺离子的氧化。基于改性 PEA ₂ SnI ₄的纯红色 PeLED 的 EQE_最大值达到创纪录的 9.32%。

更新日期：2023-10-27

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