Vacuum-driven precrystallization enables efficient all-perovskite tandem solar cells

IF 35.4 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Joule Pub Date : 2025-04-16 DOI:10.1016/j.joule.2025.101825

Mingyu Li , Jun Yan , Afei Zhang , Xinzhao Zhao , Xuke Yang , Shuwen Yan , Ning Ma , Tianjun Ma , Dingfu Luo , Zhenhua Chen , Luying Li , Xiong Li , Chao Chen , Haisheng Song , Jiang Tang

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Abstract

The power conversion efficiency of all-perovskite tandem solar cells (TSCs) suffers from inferior film quality and the susceptible fabrication processes of lead-tin narrow band-gap (Pb-Sn NBG) perovskite subcells. Herein, we developed a robust vacuum-driven precrystallization (VDP) strategy for high-quality Pb-Sn NBG perovskite films. Compared with traditional anti-solvent methods, the present precrystallization step could significantly retard the perovskite crystallization process by mild vacuum pumping. The above evolution process was quantitatively studied for the perovskite intermediate phase (PIP). The slow solvent extraction of the VDP strategy promotes a low surface energy of (100) plane-oriented precrystallization and provides sufficient time for grain ripening. The obtained Pb-Sn perovskite presented overall texture homogeneity and high crystallinity. The resulting all-perovskite TSCs yielded a top certified efficiency of 28.87% (28.09%) under reverse (forward) scan. Our VDP strategy promises efficient perovskite TSCs and contributes a key step toward robust and scalable photovoltaic technology.

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真空驱动预结晶使高效的全钙钛矿串联太阳能电池成为可能

全钙钛矿串联太阳能电池（TSCs）的功率转换效率受到薄膜质量差和铅锡窄带隙（Pb-Sn NBG）钙钛矿亚电池制作工艺的影响。在此，我们开发了一种强大的真空驱动预结晶（VDP）策略，用于高质量的Pb-Sn NBG钙钛矿薄膜。与传统的抗溶剂方法相比，该预结晶步骤可以明显延缓钙钛矿的结晶过程。对钙钛矿中间相（PIP）的上述演化过程进行了定量研究。VDP策略的缓慢溶剂萃取促进了（100）平面预结晶的低表面能，为晶粒成熟提供了充足的时间。所得铅锡钙钛矿整体结构均匀，结晶度高。所得的全钙钛矿tsc在反向（正）扫描下的最高认证效率为28.87%（28.09%）。我们的VDP战略承诺高效的钙钛矿tsc，并为强大和可扩展的光伏技术迈出了关键一步。

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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.