Efficient Perovskite Solar Cell Modules with High Stability Enabled by Iodide Diffusion Barriers

Operational stability of efficient opto-electronic conversion is crucial for the success in large-scale application of perovskites devices. Owing to the intrinsically weak structure of perovskites, iodide represents the most volatile constituents, and its diffusion can induce irreversible degradation that continues to present a great challenge to realize stable perovskite devices, Here, we introduce a low-temperature processing strategy to increase the operational stability of high-efficiency perovskite solar modules by engineering low-dimensional diffusion barriers, reducing the unwanted interfacial diffusion of ions by 10(3)-10(7) times in magnitude. We finally achieved stable and efficient perovskite solar modules with an area of 36 cm(2) retaining over 95% of their initial efficiency of over 15% after 1,000 h of heating at 85 degrees C, and 91% after light soaking in AM 1.5 G solar light for 1,000 h, respectively. Our findings provide an effective strategy to realize operationally stable and efficient perovskite solar cell modules.


Published in:
Joule, 3, 11, 2748-2760
Year:
Nov 20 2019
Publisher:
Cambridge, CELL PRESS
ISSN:
2542-4351
Keywords:
Laboratories:




 Record created 2019-12-04, last modified 2019-12-05


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