Breakthrough in Perovskite Solar Cell Durability Under Harsh Conditions

Breakthrough in Perovskite Solar Cell Durability Under Harsh Conditions Perovskite Solar Cells with High Durability

Date: April 11, 2025
Source: Ulsan National Institute of Science and Technology (UNIST)

In a remarkable leap forward for renewable energy technology, researchers from the UNIST Graduate School of Carbon Neutrality, in collaboration with Gyeongsang National University, have unveiled a new type of perovskite solar cell (PSC) with outstanding resistance to high temperatures and humidity—key factors that have historically hindered commercialization.

1,000-Hour Durability at 85°C and 85% Humidity

The highlight of this innovation lies in its ability to maintain over 85% of its original power conversion efficiency (PCE) after being tested continuously for 1,000 hours under extreme environmental conditions: 85°C and 85% relative humidity. Such thermal resilience is rare in PSCs, which have traditionally struggled under high heat due to instability in their hole transport layers.

Why This Breakthrough Matters

Perovskite solar cells are hailed as the future of photovoltaics. They boast theoretical efficiencies surpassing 30% and are cheaper to produce than conventional silicon-based cells. However, their thermal instability has blocked their path to widespread commercial deployment—until now.

This advancement introduces a key substitution in the PSCs' structure: replacing 4-tert-butylpyridine (tBP) with ethylene carbonate (EC). Unlike tBP, which reduces the thermal resistance of PSCs, EC enables the cells to maintain a glass transition temperature of 125°C, making them suitable for industrial encapsulation processes.

Efficiency Without Compromise

The new design achieves a stunning 25.56% PCE in lab conditions, the highest ever recorded for tBP-free PSCs. Even in mini-module configurations of up to 100 cm², the cells maintained an impressive 22.14% efficiency.

These figures indicate a significant milestone on the road to large-scale deployment of PSCs, particularly in high-temperature environments such as deserts or industrial rooftops.

What’s Next for PSCs?

According to Professor Dong Suk Kim, the breakthrough “represents a significant step toward the practical application of perovskite solar cells.” By overcoming the primary challenge of thermal degradation, PSCs could soon rival—or even surpass—traditional silicon solar technologies in real-world installations.

This innovation brings us closer to a sustainable, carbon-neutral future by enabling the use of lightweight, high-efficiency solar panels in environments that were previously off-limits due to heat sensitivity.

Read the original article on TechXplore

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