Self-Assembling Hole Contacts Propel Triple-Junction All-Perovskite Solar Cells to Record 29.1% Efficiency and 500-Hour Stability

July 12, 2026

Joule USA

Overview

Researchers have developed a triple-junction all-perovskite solar cell integrating self-assembling hole contacts in all subcells, achieving a certified power conversion efficiency of 29.1%. This innovative design effectively mitigates voltage losses and non-radiative recombination, particularly in wide-bandgap subcells, while demonstrating remarkable stability by retaining 90% of its initial efficiency after 500 hours of continuous operation at the maximum power point. This breakthrough marks a critical step towards the commercialization of high-efficiency, next-generation perovskite photovoltaics.

In Depth

Background

All-perovskite tandem solar cells are gaining attention as a next-generation high-efficiency solar cell technology, potentially offering simplified manufacturing processes and lower material costs compared to traditional silicon-based tandems. However, controlling interfacial defects, especially in multi-layer structures, and ensuring long-term stability have been significant barriers to commercialization.

Key Findings

This research reports the successful development of triple-junction all-perovskite solar cells incorporating self-assembling hole contacts in all subcells, achieving an exceptionally high certified power conversion efficiency of 29.1%. This innovative architecture represents a groundbreaking breakthrough that simultaneously enhances both the performance and stability of perovskite solar cells. The certified efficiency of 29.1% significantly surpasses the efficiency of laboratory-scale single-junction perovskite cells and approaches the theoretical limits of solar energy conversion.

Technical Details

The developed triple-junction all-perovskite solar cell system is designed to stack three different perovskite subcells, enabling more efficient and broader absorption of the solar spectrum. Central to this system is the integration of self-assembling hole contacts within each subcell. This critical feature effectively suppresses voltage losses, particularly in wide-bandgap perovskite subcells, and significantly reduces non-radiative recombination. The research team achieved improved crystal orientation in the wide-bandgap perovskite films, maximizing charge carrier mobility and collection efficiency. The self-assembling hole contacts and improved crystal orientation employed in this study offer effective solutions to these challenges. Beyond its high efficiency, this optimized device demonstrated outstanding operational stability, maintaining 90% of its initial efficiency after 500 hours of continuous operation at the maximum power point (MPP). This largely overcomes the traditional durability challenges associated with perovskite solar cells.

Strategic Significance and Outlook

The achievement with this triple-junction all-perovskite solar cell marks a crucial step in the commercialization of perovskite photovoltaics. The dual accomplishment of high efficiency and high stability will accelerate practical applications across a wide range of uses, from utility-scale solar farms and building-integrated photovoltaics (BIPV) to even specialized applications like space power generation. Moving forward, the research team is expected to focus on further improving efficiency, scaling up cell areas, reducing manufacturing costs, and conducting long-term field tests in outdoor environments. If this technology is successfully brought to market, it holds immense potential to significantly contribute to the widespread adoption of renewable energy and the realization of a sustainable society.

Source: https://www.researchgate.net/publication/408650281_Triple-junction_all-perovskite_solar_cells_with_self-assembling_hole_contacts_in_all_subcells

Get our weekly technology intelligence — free

Receive an infographic that lets you judge at a glance whether each field’s analysis report is worth reading.

Subscribe Free — Weekly Tech Intelligence

By subscribing, you’ll receive Troy-Technical’s weekly technology intelligence newsletter.