Journal
JOULE
Volume 5, Issue 8, Pages 2148-2163Publisher
CELL PRESS
DOI: 10.1016/j.joule.2021.06.001
Keywords
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Funding
- National Natural Science Foundation of China [21975028, 51972004]
- National Key Research and Development Program of China [2017YFA0206701, 2020YFB1506400]
- China Postdoctoral Science Foundation [2020M670040]
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The research utilized sandwiched electrode buffer technology to enhance the efficiency and stability of perovskite solar cells, leading to improved performance of PSCs in practical applications.
With the rapid progress of perovskite solar cells (PSCs), both high efficiency and sufficient stability are required simultaneously for their real-life application, wherein interfaces play an essential role. In this work, we develop sandwiched electrode buffer (SEB) with respect to the hole-transport layer (HTL), wherein dual back surface fields are implemented at two interfaces in relevance. The SEB bridges the absorber to the back electrode with the desired band alignment and multi-defect passivation effects, which stabilize the perovskite, HTL, and metal electrodes. Accordingly, planar n-i-p PSCs with SEB achieve an efficiency of 23.9% (certified 23.4%). Notably, they exhibit a remarkable operational stability with only a 3% efficiency decline for 2,000 h maximum power point tracking under 1-Sun illumination. Furthermore, the devices also show excellent thermal stability and humidity stability. Therefore, the SEB configuration boosts both efficiency and stability of PSCs, which paves the way for the commercialization of perovskite optoelectronics.
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