Quantum Dots Mediated Crystallization Enhancement in Two-Step Processed Perovskite Solar Cells

IF 36.3 1区材料科学 Q1 Engineering Nano-Micro Letters Pub Date : 2025-02-27 DOI:10.1007/s40820-025-01677-5

Heng Liu, Geyu Jin, Jiantao Wang, Weihai Zhang, Long Qing, Yao Zhang, Qiongqiong Lu, Pengfei Yue, Guoshang Zhang, Jing Wei, Hongbo Li, Hsing-Lin Wang

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Abstract

Highlights

The incorporation of quantum dots (QDs) as crystallization seeds results in the growth of larger perovskite crystals with reduced defect densities and preferential orientations along the (001) and (002) planes, significantly improving the film morphology.
The QD-seeded films exhibit reduced non-radiative recombination and enhanced charge transport, as confirmed by steady-state and time-resolved photoluminescence, transient photovoltage measurements, and electrochemical impedance spectroscopy.
Devices fabricated with QD-treated films achieve a remarkable power conversion efficiency (PCE) of 24.75% and exhibit exceptional long-term stability under simulated sunlight exposure, retaining 80% of their PCE after 1000 h of continuous illumination.

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两步法钙钛矿太阳能电池中量子点介导的结晶增强

量子点（QDs）作为结晶种子的掺入导致更大的钙钛矿晶体的生长，其缺陷密度降低，沿（001）和（002）面有优先取向，显著改善了薄膜的形貌。稳态和时间分辨光致发光、瞬态光电压测量和电化学阻抗谱证实，量子点种子薄膜表现出减少的非辐射复合和增强的电荷输运。用qd处理薄膜制作的器件实现了24.75%的功率转换效率（PCE），并且在模拟阳光照射下表现出优异的长期稳定性，在连续照明1000小时后保持了80%的PCE。

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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.