JACS Paper: Bidirectional Interfacial Stabilization Achieves 26.53% Perovskite Solar Cell Efficiency, 96% Retention After 1000 Hours

July 26, 2026

Journal of the American Chemical Society USA

Overview

A new study in the Journal of the American Chemical Society demonstrates a “bidirectional chemical and mechanical interfacial stabilization (BCIS)” effect, dramatically enhancing the operational stability and mechanical robustness of perovskite solar cells. This novel strategy resulted in devices achieving a power conversion efficiency (PCE) of up to 26.53% and retaining 96% of their initial efficiency after 1,000 hours of continuous operation under ISOS-L-1l protocols. Furthermore, a large-area module of 818 cm² achieved a PCE of 20.08%, indicating strong compatibility with industrial manufacturing.

In Depth

Key Findings

A groundbreaking demonstration of “bidirectional chemical and mechanical interfacial stabilization (BCIS)” has significantly advanced the operational stability and mechanical reliability of perovskite solar cells, as reported in the Journal of the American Chemical Society. This innovative strategy enabled perovskite solar cells to achieve a high power conversion efficiency (PCE) of up to 26.53%. Crucially, the devices maintained an outstanding 96% of their initial efficiency after 1,000 hours of continuous operation under the international standard ISOS-L-1l protocol, signifying a major step towards the commercial viability of perovskite technology. Additionally, a large-area module device, measuring 818 cm², also achieved a respectable PCE of 20.08%, underscoring its compatibility with industrial-scale manufacturing.

Technical Details

The BCIS strategy is realized by introducing a specialized molecular layer at the interface between the perovskite and adjacent charge transport layers, providing both chemical bonding and mechanical reinforcement. The chemical stabilization effectively suppresses non-radiative recombination of charge carriers at the interface, thereby improving device efficiency. Concurrently, the mechanical stabilization prevents cracking and delamination of the perovskite thin film, which can occur during manufacturing or operation due to stress, particularly from thermal expansion and contraction. This dual approach allows the devices to maintain superior optoelectronic properties while significantly enhancing their physical robustness. The 96% efficiency retention over 1,000 hours offers a potent solution to the long-standing problem of long-term stability in perovskite solar cells, and the 20.08% efficiency for an 818 cm² module indicates that lab-scale performance can be maintained when scaled up.

Background & Context

Perovskite solar cells have generated considerable excitement as a ‘wonder material’ in photovoltaics, owing to their potential for high efficiency comparable to or exceeding silicon, and their low-cost solution-process manufacturing. However, the most significant barrier to their commercialization has been their long-term instability against heat, humidity, light, and mechanical stress. Specifically, the inherent fragility of the material’s crystal structure and interface degradation have been major contributors to short device lifetimes. The BCIS technology offers a fundamental solution to these complex, interconnected problems, representing a decisive step for perovskite solar cells to be accepted as a practical product in the market. This will solidify perovskite technology’s position as a strong contender to revolutionize the existing photovoltaic market.

Strategic Significance & Outlook

The success of bidirectional chemical and mechanical interfacial stabilization technology will profoundly impact the commercialization roadmap for perovskite solar cells. The demonstration of high efficiency and exceptional long-term stability is expected to boost investor and industry confidence, accelerating investment in mass production. The next focus will be to apply this technology to even larger modules and develop cost-effective manufacturing processes. This breakthrough lays the foundation for widespread adoption of perovskite solar cells across a range of applications, including residential, commercial, and utility-scale power generation. Improved reliability and durability will also have ripple effects on the development of diverse solar cell forms, such as flexible and transparent photovoltaics, making it an indispensable technology in shaping the future of renewable energy.

Source: https://pubs.acs.org/doi/10.1021/jacs.6c06932

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