Highlights from ACAP Perovskite Stability Workshop 2025

On March 21st, PV researchers from across the ACAP network gathered at UNSW for a deep dive into one of the biggest challenges and opportunities in next-gen solar tech, perovskite stability. Hosted by ANU’s Professor Klaus Weber and ACAP, the Perovskite Stability Workshop offered a space for open collaboration, updates, and strategic planning to fast-track the commercial readiness of perovskite solar cells.

Commercial perovskite PV module testing at UNSW

UNSW will soon begin outdoor testing of perovskite PV modules from a range of commercial manufacturers, including tandem designs.

Participating companies have agreed to share de-identified performance data, creating a powerful dataset to benchmark real-world perovskite module stability. This will complement existing datasets (like NREL’s) and help drive data-driven improvements across the board.

A new outdoor measurement platform

The group had an in-depth discussion about the development and capabilities of the outdoor measurement system coming to UNSW. This platform will support:

• current and emerging ACAP research needs for the next few years

• easy replication across ACAP nodes to reduce the need to ship samples between sites.

Ultimately, this will enable more consistent and scalable testing of perovskite modules across the network.

Rethinking stability metrics

How do we define ‘stability’ in perovskites?How might we measure energy yield?

Workshop participants tackled these key questions while reviewing the latest in testing protocols, particularly IEC and ISOS standards. The consensus: we need better, more unified ways to define and measure stability and energy yield, which is what ultimately matters in long-term performance.

National facilities and tools

There were exciting updates on national infrastructure, including:

• the specialised measurement facilities at CSIRO

• custom-built stability testing tools developed by ACAP partner institutions and the purpose of this equipment.

This shared tech ecosystem will be vital to accelerating innovation and deployment.

Recent perovskite device performance and stability results at ACAP nodes

Several ACAP nodes presented their latest performance and stability results. This included some novel approaches aimed at ensuring high stability can be achieved using processes that are not only suitable for small area cells, but can be translated to large area, industrial fabrication techniques.  

What comes next?

The agreed action items were as follows.

1. Unified stability testing across ACAP

A standardised test system will be implemented across ACAP nodes to ensure consistent, comparable data. Results in the literature are very hard to compare to each other due to the vastly different testing conditions in each case, which are often not specified.

2. Yearly stability targets

Clear, measurable perovskite stability goals for ACAP nodes will be developed to help align research and assess progress. These goals may make use of standardised indoor test equipment, as well as outdoor test systems. Ideally this will include metrics that consider yield.

3. Shared data access

A centralised performance-stability results database will be established, making it easier for all ACAP members to stay in sync and share insights.

The 2025 ACAP Workshop on Perovskite Stability highlighted just how much potential and momentum there is in this space. With collaborative testing platforms, shared goals, and open data access on the horizon, the future looks bright for perovskite PV.

The presentations

Outdoor monitoring of perovskite-based solar cells and modules: Félix Gayot, Ziv Hameiri (UNSW)

Reviews on stability test protocols and standards Jueming Bing, Suer Zhou, Anita Ho-Baillie (University of Sydney)

Update on IEC perovskite measurement standard, and relevant measurement facilities at CSIRO Newcastle Christopher Fell (CSIRO Newcastle)

Perovskite solar cell stability Jacek Jasieniak (Monash)

Plans for reliability testing at ANU

Manufacturing compatibility and stability of p-i-n perovskite solar cells using fluorinated ammonium additives​ Hellen Jin (UQ)

Equipment for indoor testing at ANU Klaus Weber (ANU)

Strategies to enhance the performance and stability of perovskite cells The Duong (ANU)

Perovskite solar cell researchers from across the ACAP nodes came together in March 2025 at UNSW for a workshop tackling perovskites stability.