A scalable solar-powered device for economical green hydrogen production has been developed by Indian scientists in Bengaluru

What constitutes the innovation?

Created an advanced device that separates water molecules to generate green hydrogen exclusively using solar power.

Utilizes widely available, inexpensive materials, steering clear of fossil fuels and rare, costly elements.

Utilizes a silicon-based photoanode featuring a sophisticated n-i-p heterojunction structure.

Technical Features:

Architecture: n-type TiO₂ / intrinsic Si / p-type NiO layers — facilitating effective charge separation and transport.

Manufacturing: Employing magnetron sputtering, a method suitable for large-scale industry.

Obtained 600 mV surface photovoltage, with a low onset potential of 11 VRHE.

Showed sustained stability over time – 10 hours of continuous operation with less than 4% decrease in performance.

Achieved a 25 cm² photoanode size — efficient for large-scale hydrogen generation.

Benefits of the Device:

Enhanced conversion effectiveness: Delivers exceptional solar-to-hydrogen conversion, optimizing energy production from sunlight.

Exclusively solar-powered: Functions completely on solar energy, removing the requirement for external electricity sources or fossil fuels.

Resilient and steady: Ensures lasting stability even in alkaline environments, crucial for effective, ongoing application.

Affordable materials: Constructed using materials that are plentiful and inexpensive, allowing for economically feasible mass production.

Scalable design: Effectively showcased on a 25 cm² photoanode, confirming viability for widespread industrial implementation.

Importance:

Decarbonizing sectors: Facilitates green hydrogen generation to lower emissions in challenging-to-reduce industrial areas.

Propels India's hydrogen initiative: Supports India's goal for a hydrogen-based economy as part of its energy transition objectives.

Aids in achieving net-zero goals: Provides a clean fuel option that supports both national and international net-zero emission pledges.

Global energy transformation: Supports a movement towards sustainable and renewable energy systems across various sectors.

Flexible uses: Fuels upcoming hydrogen-driven solutions—from residential energy storage to transportation and industrial applications.