Integrated memristor for mitigating reverse-bias in perovskite solar cells | Nature

Subjects

- Solar cells

Abstract

Perovskite solar cells (PSCs) with power-conversion efficiencies comparable to established technologies hold huge promise for becoming the future photovoltaic technology, also given their versatility, low-cost and energy-efficient fabrication processes1. However, PSCs are not stable under moderate reverse bias2,3,4, an unavoidable situation under real-world operation, for instance, caused by partial shading of a module or installation with PSCs connected in series. Approaches to address this issue have focused on engineering the device architecture to enhance the breakdown voltage and mitigate the detrimental effects of reverse bias2,5,6. Here we present a completely different approach that fully solves the reverse-bias issue. With our Memsol, we developed a new concept of a solar cell with an integrated memristor, which protects the solar cell and simultaneously works as a bypass element. The memristor is realized by area-selective deposition of an additional metal–insulator stack and shares the perovskite and electrodes with the solar-cell part. Reverse-bias and shading tests show that the Memsol remains stable and automatically toggles between a low-resistance bypass state and full-efficiency solar-cell operation, dependent on the illumination and bias conditions. We anticipate that our Memsol concept, which we demonstrated on a nine-cell string in the lab, will be implemented in large-scale modules, accelerating their commercialization and potentially making external bypass diodes unnecessary.

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Fig. 1: Memsol concept and realization.

Fig. 2: Memsol performance.

Fig. 3: Cycling, limitations and double-memristor Memsol.

Fig. 4: Partial shading measurement of a solar-cell string at MPP.

Data availability

All data supporting the findings of this study are available within the paper, Extended Data and Supplementary Information.

References

- Correa-Baena, J.-P. et al. Promises and challenges of perovskite solar cells. Science 358, 739–744 (2017).

Article

ADS

CAS

PubMed

Google Scholar

- Jiang, F. et al. Improved reverse bias stability in p–i–n perovskite solar cells with optimized hole transport materials and less reactive electrodes. Nat. Energy 9, 1275–1284 (2024).

Article

ADS

CAS

Google Scholar

- Bogachuk, D. & Feldmann, F. Do perovskites need silicon to be stable under reverse bias? Joule 7, 2423–2426 (2023).

Article

Google Scholar

- Johnson, S. et al. How non-ohmic contact-layer diodes in perovskite pinholes affect abrupt low-voltage reverse-bias breakdown and destruction of solar cells. Joule 9, 102102 (2025).

Article

CAS

Google Scholar

- Li, N. et al. Barrier reinforcement for enhanced perovskite solar cell stability under reverse bias. Nat. Energy 9, 1264–1274 (2024).

Article

ADS

CAS

Google Scholar

- Bogachuk, D. et al. Perovskite photovoltaic devices with carbon-based electrodes withstanding reverse-bias voltages up to –9 V and surpassing IEC 61215:2016 international standard. Sol. RRL 6, 2100527 (2022).

Article

CAS

Google Scholar

- Li, Z. et al. Stabilized hole-selective layer for high-performance inverted p-i-n perovskite solar cells. Science 382, 284–289 (2023).

Article

ADS

CAS

PubMed

Google Scholar

- Cao, Q. et al. Co-self-assembled monolayers modified NiOx for stable inverted perovskite solar cells. Adv. Mater. 36, 2311970 (2024).

Article

CAS

Google Scholar

- Al-Ashouri, A. et al. Conformal monolayer contacts with lossless interfaces for perovskite single junction and monolithic tandem solar cells. Energy Environ. Sci. 12, 3356–3369 (2019).

Article

CAS

Google Scholar

- Park, S. M. et al. Low-loss contacts on textured substrates for inverted perovskite solar cells. Nature 624, 289–294 (2023).

Article

ADS

CAS

PubMed

Google Scholar

- Yu, S. et al. Homogenized NiOx nanoparticles for improved hole transport in inverted perovskite solar cells. Science 382, 1399–1404 (2023).

Article

ADS

CAS

PubMed

Google Scholar

- Zheng, X. et al. Co-deposition of hole-selective contact and absorber for improving the processability of perovskite solar cells. Nat. Energy 8, 462–472 (2023).

Article

ADS

CAS

Google Scholar

- Wang, C. et al. Perovskite solar cells in the shadow: understanding the mechanism of reverse-bias behavior toward suppressed reverse-bias breakdown and reverse-bias induced degradation. Adv.