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Flexible Perovskite Solar Cells onto Plastic Substrate Exceeding 13% Efficiency Owing to the Optimization of CH3NH3PbI3–xClx Film via H2O Additive
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2017-11-21 00:00:00 , DOI: 10.1021/acssuschemeng.7b03382 Yangyang Du 1 , Hongkun Cai 1 , Xichang Bao 2 , Zhixue Xing 1 , Yunhao Wu 1 , Jian Xu 1 , Like Huang 1 , Jian Ni 1 , Juan Li 1 , Jianjun Zhang 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2017-11-21 00:00:00 , DOI: 10.1021/acssuschemeng.7b03382 Yangyang Du 1 , Hongkun Cai 1 , Xichang Bao 2 , Zhixue Xing 1 , Yunhao Wu 1 , Jian Xu 1 , Like Huang 1 , Jian Ni 1 , Juan Li 1 , Jianjun Zhang 1
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In this work, flexible perovskite solar cells (F-PSCs) are fabricated utilizing the device polyethylene terephthalate (PET) substrate/ITO/PEDOT:PSS/CH3NH3PbI3–xClx/PCBM/Ag, which exhibits the optimal power conversion efficiency (PCE) reaching 13.27%, superb stability against bending deformation, and advantageous stability in ambient atmosphere without encapsulation. Meanwhile, we herein confirm a fact that incorporating suitable H2O additive into the perovskite precursor solution leads to an enhanced CH3NH3PbI3–xClx perovskite quality for F-PSCs application, including the improvement of morphology and electrical properties. To better summarize the mechanism concerning how H2O additive affects the perovskite film quality, CH3NH3PbI3–xClx films are prepared by a simple one-step spinning method from a solution containing CH3NH3I, PbI2, and PbCl2 in a mixed solvent of H2O and dimethylformamide (DMF) with solely various volume ratio ranging from 0.1% to 0.9%. Through a comparative analysis, it is proposed that H2O additive prolongs the CH3NH3PbI3–xClx recrystallization process contributing to slower crystallization rate. Additionally, it can merge adjacent perovskite grain together by accelerating the diffusion of ions within the predeposited films toward the grain boundary, thereby yielding large and densely packed perovskite grain size.
中文翻译：
由于通过H 2 O添加剂优化了CH 3 NH 3 PbI 3– x Cl x薄膜，柔性钙钛矿太阳能电池在塑料基板上的效率超过13％
在这项工作中，利用聚对苯二甲酸乙二醇酯（PET）基板/ ITO / PEDOT：PSS / CH 3 NH 3 PbI 3– x Cl x / PCBM / Ag制造了柔性钙钛矿太阳能电池（F-PSC）。功率转换效率（PCE）达到13.27％，对弯曲变形具有极佳的稳定性，并且在没有封装的情况下在周围环境中具有有利的稳定性。同时，我们在本文中证实了以下事实：在钙钛矿前体溶液中掺入合适的H 2 O添加剂会导致CH 3 NH 3 PbI 3– x Cl x增强。用于F-PSC的钙钛矿质量，包括形态和电性能的改善。为了更好地概括有关H 2 O添加剂如何影响钙钛矿膜质量的机理，通过简单的一步纺丝方法，从含CH 3 NH 3 I，PbI 2的溶液中制备CH 3 NH 3 PbI 3– x Cl x膜。H 2 O和二甲基甲酰胺（DMF）的混合溶剂中的PbCl 2和体积比分别为0.1％至0.9％。通过比较分析，提出H 2 O添加剂延长了CH 3的寿命。NH 3 PbI 3– x Cl x重结晶过程导致结晶速率降低。另外，它可以通过加速预沉积膜中离子向晶界的扩散，将相邻的钙钛矿晶粒合并在一起，从而产生较大且密集堆积的钙钛矿晶粒尺寸。
更新日期：2017-11-21
中文翻译：
由于通过H 2 O添加剂优化了CH 3 NH 3 PbI 3– x Cl x薄膜，柔性钙钛矿太阳能电池在塑料基板上的效率超过13％
在这项工作中，利用聚对苯二甲酸乙二醇酯（PET）基板/ ITO / PEDOT：PSS / CH 3 NH 3 PbI 3– x Cl x / PCBM / Ag制造了柔性钙钛矿太阳能电池（F-PSC）。功率转换效率（PCE）达到13.27％，对弯曲变形具有极佳的稳定性，并且在没有封装的情况下在周围环境中具有有利的稳定性。同时，我们在本文中证实了以下事实：在钙钛矿前体溶液中掺入合适的H 2 O添加剂会导致CH 3 NH 3 PbI 3– x Cl x增强。用于F-PSC的钙钛矿质量，包括形态和电性能的改善。为了更好地概括有关H 2 O添加剂如何影响钙钛矿膜质量的机理，通过简单的一步纺丝方法，从含CH 3 NH 3 I，PbI 2的溶液中制备CH 3 NH 3 PbI 3– x Cl x膜。H 2 O和二甲基甲酰胺（DMF）的混合溶剂中的PbCl 2和体积比分别为0.1％至0.9％。通过比较分析，提出H 2 O添加剂延长了CH 3的寿命。NH 3 PbI 3– x Cl x重结晶过程导致结晶速率降低。另外，它可以通过加速预沉积膜中离子向晶界的扩散，将相邻的钙钛矿晶粒合并在一起，从而产生较大且密集堆积的钙钛矿晶粒尺寸。
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