Breakthrough in solar cells technology offers great cost and efficiency gains

A breakthrough in solar cell technology has opened the way to low cost solar cell to be commercialised that can work for up to 10,000 hours without its performance falling.

The potential of organo lead-halide perovskite solar cells (PSC) to provide better power conversion efficiencies (+22%), comparable to silicon solar cells at half of the price has been leading the photovoltaic research scene.

Perovskite solar cells hold an advantage over traditional silicon solar cells in the simplicity of their processing. Organic-inorganic perovskite material can be manufactured with simpler wet chemistry techniques in a traditional lab environment.

Problems of low-device stability have up until now been a brake on commercial uptake.

Researchers have engineered a multi-dimensional junction of 2D and 3D perovskites to produce a low-cost solar module capable of lasting more than 400 days without a loss in efficiency.

The 2D/3D forms an exceptional gradually-organized multi-dimensional interface that yields up to 12.9% efficiency in a carbon-based architecture, and 14.6% in standard mesoporous solar cells.

Researchers have fabricatde 10 × 10 cm2 solar modules by a fully printable industrial-scale process, delivering 11.2% efficiency stable for >10,000 h with zero loss in performances measured under controlled standard conditions.

Importantly, it shows a much better trend in the device stability (delivering an average efficiency above 13% in the same cell architecture).

This represents an important proof of concept that paves the way to further stabilize the high efficiency (beyond 21%) mesoporous solar cells based on a mixed halide composition.

This innovative stable and low-cost architecture will enable the timely commercialization of perovskite solar cells.

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June 9, 2017
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