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Metastable Dion-Jacobson 2D structure enables efficient and stable perovskite solar cells
Science ( IF 44.7 ) Pub Date : 2022-01-06 , DOI: 10.1126/science.abj2637
Fei Zhang 1 , So Yeon Park 1 , Canglang Yao 2, 3 , Haipeng Lu 1 , Sean P Dunfield 4, 5, 6 , Chuanxiao Xiao 4 , Soňa Uličná 7 , Xiaoming Zhao 8 , Linze Du Hill 9 , Xihan Chen 1 , Xiaoming Wang 2, 3 , Laura E Mundt 7 , Kevin H Stone 7 , Laura T Schelhas 1, 7 , Glenn Teeter 4 , Sean Parkin 10 , Erin L Ratcliff 9, 11, 12 , Yueh-Lin Loo 8 , Joseph J Berry 4, 5, 13 , Matthew C Beard 1 , Yanfa Yan 2, 3 , Bryon W Larson 1 , Kai Zhu 1
Affiliation  

Directing efficient hole transport Surface defects in three-dimensional perovskites can decrease performance but can be healed with coatings based on two-dimensional (2D) perovskite such as Ruddlesden-Popper phases. However, the bulky organic groups of these 2D phases can lead to low and anisotropic charge transport. F. Zhang et al . show that a metastable polymorph of a Dion-Jacobson 2D structure based on asymmetric organic molecules reduced the energy barrier for hole transport and their transport through the layer. When used as a top layer for a triple-cation mixed-halide perovskite, a solar cell retained 90% of its initial power conversion efficiency of 24.7% after 1000 hours of operation at approximately 40°C in nitrogen. —PDS

中文翻译:

亚稳态 Dion-Jacobson 二维结构可实现高效稳定的钙钛矿太阳能电池

引导有效的空穴传输 三维钙钛矿中的表面缺陷会降低性能,但可以使用基于二维 (2D) 钙钛矿的涂层(如 Ruddlesden-Popper 相)来修复。然而,这些 2D 相的庞大有机基团会导致低电荷传输和各向异性电荷传输。F.张等人. 表明基于不对称有机分子的 Dion-Jacobson 2D 结构的亚稳态多晶型物降低了空穴传输的能垒及其通过层的传输。当用作三阳离子混合卤化物钙钛矿的顶层时,在大约 40°C 的氮气中运行 1000 小时后,太阳能电池保持其初始功率转换效率 24.7% 的 90%。—PDS
更新日期:2022-01-06
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