Electroluminescent Solar Cells Based on CsPbI3 Perovskite Quantum Dots,Advanced Functional Materials

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Electroluminescent Solar Cells Based on CsPbI3 Perovskite Quantum Dots
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2021-10-27 , DOI: 10.1002/adfm.202108615
Yao Wang ₁ , Chenghao Duan ₂ , Xuliang Zhang ₁ , Jianguo Sun ₁ , Xufeng Ling ₁ , Junwei Shi ₁ , Long Hu ₃ , Zizhen Zhou ₄ , Xianxin Wu ₅ , Wei Han ₆ , Xinfeng Liu ₅ , Claudio Cazorla ₇ , Dewei Chu ₄ , Shujuan Huang ₃ , Tom Wu ₄ , Jianyu Yuan ₁ , Wanli Ma ₁

Affiliation

All-inorganic CsPbX₃ (X = Cl, Br, I, or mixed halides) perovskite quantum dots (QDs) exhibit tunable optical bandgaps and narrow emission peaks, which have received worldwide interest in the field of both photovoltaics (PVs) and light-emitting diodes (LEDs). Herein, it is reported a discovery that CsPbI₃ perovskite QD solar cell can simultaneously deliver high PV performance and intense electroluminescence. In specific, the multifunctional CsPbI₃ QD film is fabricated through a simple yet efficient solid-state-ligand exchange process using a tailored organic ligand triphenyl phosphite (TPPI). The function of QD surface manipulation using TPPI here is proven to be twofold, balancing the carrier transport and effectively passivating the QD surface to produce conductive and emissive QD film. The CsPbI₃ perovskite QD solar cell delivers a champion efficiency of 15.21% with improved open circuit voltage and high fill factor. Concurrently functioning as a red LED, the CsPbI₃ perovskite QD solar cell outputs electric power to light conversion efficiency approaching 4%, a record value for QD electroluminescent PVs. The results here indicate that these versatile perovskite QDs may be a promising candidate for fabricating multifunctional optoelectronic devices.

中文翻译：

基于 CsPbI3 钙钛矿量子点的电致发光太阳能电池

全无机 CsPbX ₃ (X = Cl、Br、I 或混合卤化物) 钙钛矿量子点 (QD) 具有可调谐的光学带隙和窄发射峰，在光伏 (PV) 和光-发光二极管（LED）。在此，据报道发现CsPbI ₃钙钛矿量子点太阳能电池可以同时提供高光伏性能和强电致发光。具体而言，多功能 CsPbI ₃量子点薄膜是通过一种简单而有效的固态配体交换工艺使用定制的有机配体亚磷酸三苯酯 (TPPI) 制造的。此处使用 TPPI 进行 QD 表面处理的功能被证明是双重的，即平衡载流子传输和有效地钝化 QD 表面以产生导电和发射 QD 薄膜。CsPbI ₃钙钛矿 QD 太阳能电池具有 15.21% 的冠军效率，具有改进的开路电压和高填充因子。同时用作红色 LED，CsPbI ₃钙钛矿 QD 太阳能电池输出电能到光的转换效率接近 4%，这是 QD 电致发光 PV 的记录值。这里的结果表明，这些多功能钙钛矿量子点可能是制造多功能光电器件的有希望的候选者。

更新日期：2021-10-27

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