Phase-stabilized 2D/3D hetero-bilayers via lattice matching for efficient and stable inverted solar cells

IF 35.4 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Joule Pub Date : 2025-06-18 DOI:10.1016/j.joule.2025.101954

Shripathi Ramakrishnan , Baitao Chen , Xiaoyu Zhang , Yi Xie , Xiao Tong , Yuanze Xu , Anna Niamh Alphenaar , Amar Ruthen , Adewale Joseph Babatunde , Yugang Zhang , Mircea Cotlet , David B. Mitzi , Qiuming Yu

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Abstract

2D-on-3D (2D/3D) perovskite heterostructures with engineered energy landscapes offer the potential to realize efficient and stable inverted solar cells. However, managing the energy landscape using 2D perovskites with thicker inorganic layers n > 1 necessitates the usage of the chemically unstable methylammonium MA⁺. We synthesized formamidinium (FA)-rich and pure-FA n = 3 Ruddlesden-Popper (RPP) and Dion-Jacobson perovskite (DJP) single crystals by identifying ligands with suitably lattice-matched organic and inorganic components of the 2D lattice. These crystals were translated onto 3D perovskites as capping layers, forming 2D/3D hetero-bilayers (HBs). Degradation studies revealed that HBs with butylammonium-based RPPs as capping layers rapidly phase segregate into non-perovskites under combined extrinsic stressors, compromising the underlying 3D layer, whereas FA-rich DJPs based on 3-aminomethylpiperidine retain their phase stability. The DJP HBs also possess a favorable energy landscape and electron transport at the 2D/3D interface, enabling inverted solar cells with a champion PCE of 25.33% and remarkable stability.

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通过晶格匹配的相位稳定的二维/三维异质双分子层用于高效和稳定的倒立太阳能电池

具有工程能量景观的2D-on-3D （2D/3D）钙钛矿异质结构为实现高效稳定的倒置太阳能电池提供了潜力。然而，使用具有较厚无机层的二维钙钛矿管理能源景观；1需要使用化学不稳定的甲基铵MA+。我们通过鉴定配体中晶格匹配的有机和无机组分，合成了富甲脒（FA）和纯FA n = 3的Ruddlesden-Popper （RPP）和Dion-Jacobson钙钛矿（DJP）单晶。这些晶体被转化到三维钙钛矿上作为封盖层，形成2D/3D异质双层（HBs）。降解研究表明，以丁胺基RPPs为盖层的HBs在联合外部压力下迅速相分离为非钙钛矿，破坏了底层的3D层，而基于3-氨基甲基哌啶的富fa DJPs则保持了其相稳定性。DJP HBs还具有良好的能量景观和2D/3D界面上的电子传递，使倒置太阳能电池的PCE达到25.33%，稳定性显著。

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来源期刊

Joule Energy-General Energy

CiteScore

53.10

自引率

2.00%

发文量

198

期刊介绍： Joule is a sister journal to Cell that focuses on research, analysis, and ideas related to sustainable energy. It aims to address the global challenge of the need for more sustainable energy solutions. Joule is a forward-looking journal that bridges disciplines and scales of energy research. It connects researchers and analysts working on scientific, technical, economic, policy, and social challenges related to sustainable energy. The journal covers a wide range of energy research, from fundamental laboratory studies on energy conversion and storage to global-level analysis. Joule aims to highlight and amplify the implications, challenges, and opportunities of novel energy research for different groups in the field.