What question did this study set out to answer?

Investigate whether modifying a tin oxide electron-transport layer with EDTA can suppress hysteresis and enhance the efficiency and stability of planar perovskite solar cells.

August 7, 2018Nature CommunicationsOpen Access

High efficiency planar-type perovskite solar cells with negligible hysteresis using EDTA-complexed SnO2

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Authors

DYDong YangYangtze University RYRuixia YangLanzhou Jiaotong University KWKai WangAnalog Devices (United States)

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Implication

Experimental study demonstrates 21.6% efficiency and suppressed hysteresis in planar perovskite solar cells using EDTA-complexed tin oxide, highlighting a path toward stable, flexible photovoltaics.

Key Points

Investigate whether modifying a tin oxide electron-transport layer with EDTA can suppress hysteresis and enhance the efficiency and stability of planar perovskite solar cells.
Fabricated planar-type perovskite solar cells using a low-temperature processed EDTA-complexed tin oxide (SnO2) electron-transport layer on rigid and flexible substrates.
Characterized the electron mobility, Fermi level alignment, and current-voltage hysteresis of the modified devices.
Assessed device stability in unsealed conditions across 2,880 hours of ambient air exposure and 120 hours of continuous 100 mW cm⁻² illumination.
Planar perovskite solar cells achieved a record power conversion efficiency of 21.60% (21.52% certified) with negligible hysteresis, and flexible devices attained 18.28% efficiency.
EDTA-complexed SnO2 demonstrated roughly three-fold higher electron mobility than pristine SnO2 and improved Fermi level alignment with the perovskite conduction band.
Unsealed devices retained high stability, showing only 8% degradation after 2,880 hours in ambient conditions and 14% degradation after 120 hours under light irradiation.

Cite This Study

Yang et al. (2018) studied this question.

synapsesocial.com/papers/69dcc7aa89c4deb67d359deb https://doi.org/10.1038/s41467-018-05760-x

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Implication

Experimental study demonstrates 21.6% efficiency and suppressed hysteresis in planar perovskite solar cells using EDTA-complexed tin oxide, highlighting a path toward stable, flexible photovoltaics.

High efficiency planar-type perovskite solar cells with negligible hysteresis using EDTA-complexed SnO2

Discussion

Member takes

Implication

Key Points

Cite This Study

High efficiency planar-type perovskite solar cells with negligible hysteresis using EDTA-complexed SnO2

Discussion

Member takes

Implication

Key Points

Cite This Study

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