Crystallization Modulation and Holistic Passivation Enables Efficient Two-Terminal Perovskite/CuIn(Ga)Se2 Tandem Solar Cells

IF 26.6 1区材料科学 Q1 Engineering Nano-Micro Letters Pub Date : 2024-09-22 DOI:10.1007/s40820-024-01514-1

Cong Geng, Kuanxiang Zhang, Changhua Wang, Chung Hsien Wu, Jiwen Jiang, Fei Long, Liyuan Han, Qifeng Han, Yi-Bing Cheng, Yong Peng

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Abstract

Two-terminal (2-T) perovskite (PVK)/CuIn(Ga)Se₂ (CIGS) tandem solar cells (TSCs) have been considered as an ideal tandem cell because of their best bandgap matching regarding to Shockley–Queisser (S–Q) limits. However, the nature of the irregular rough morphology of commercial CIGS prevents people from improving tandem device performances. In this paper, D-homoserine lactone hydrochloride is proven to improve coverage of PVK materials on irregular rough CIGS surfaces and also passivate bulk defects by modulating the growth of PVK crystals. In addition, the minority carriers near the PVK/C60 interface and the incompletely passivated trap states caused interface recombination. A surface reconstruction with 2-thiopheneethylammonium iodide and N,N-dimethylformamide assisted passivates the defect sites located at the surface and grain boundaries. Meanwhile, LiF is used to create this field effect, repelling hole carriers away from the PVK and C60 interface and thus reducing recombination. As a result, a 2-T PVK/CIGS tandem yielded a power conversion efficiency of 24.6% (0.16 cm²), one of the highest results for 2-T PVK/CIGS TSCs to our knowledge. This validation underscores the potential of our methodology in achieving superior performance in PVK/CIGS tandem solar cells.

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结晶调制和整体钝化实现高效双端 Perovskite/CuIn(Ga)Se2 串联太阳能电池

双端（2-T）过氧化物（PVK）/铜铟（镓）硒（CIGS）串联太阳能电池（TSC）因其在肖克利-奎塞尔（S-Q）极限方面的最佳带隙匹配而被视为理想的串联电池。然而，商用 CIGS 的不规则粗糙形貌阻碍了人们改善串联器件的性能。在本文中，D-高丝氨酸内酯盐酸盐被证明可以提高 PVK 材料在不规则粗糙 CIGS 表面上的覆盖率，并通过调节 PVK 晶体的生长来钝化块状缺陷。此外，PVK/C60 界面附近的少数载流子和未完全钝化的陷阱态会导致界面重组。在 2-噻吩乙基碘化铵和 N,N-二甲基甲酰胺的辅助下进行的表面重建钝化了位于表面和晶界的缺陷位点。同时，LiF 被用来产生场效应，将空穴载流子从 PVK 和 C60 界面排斥开，从而减少了重组。因此，2-T PVK/CIGS 串联产生了 24.6% 的功率转换效率（0.16 平方厘米），这是我们所知的 2-T PVK/CIGS TSCs 的最高结果之一。这一验证强调了我们的方法在实现 PVK/CIGS 串联太阳能电池的卓越性能方面的潜力。

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来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

32.60

自引率

4.90%

发文量

981

审稿时长

1.1 months

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary, and open-access journal published under the SpringerOpen brand. Nano-Micro Letters focuses on the science, experiments, engineering, technologies, and applications of nano- or microscale structures and systems in various fields such as physics, chemistry, biology, material science, and pharmacy.It also explores the expanding interfaces between these fields. Nano-Micro Letters particularly emphasizes the bottom-up approach in the length scale from nano to micro. This approach is crucial for achieving industrial applications in nanotechnology, as it involves the assembly, modification, and control of nanostructures on a microscale.