Researchers at Indian Institute of Technology Guwahati have developed a novel perovskite semiconductor technology that significantly improves the efficiency and stability of solar cells while also enabling advanced memory devices for future computing systems.

What are Perovskites?

• Perovskites are materials with a unique crystal structure that can efficiently absorb sunlight and convert it into electricity.
• They are considered a promising alternative to conventional silicon-based solar cells because of their high efficiency and lower production cost.
• Their electrical properties also make them suitable for memory storage and neuromorphic computing applications.

Key Highlights of the Research

• The research team, led by Prof. Parameswar K. Iyer, developed a molecular interface engineering technique using specially designed organic molecules.
• These ultrathin molecular layers reduce defects and improve the movement of electrical charges inside the solar cell.
• The technology achieved a solar cell efficiency of 25.73%, among the highest for this class of devices.
• The cells retained nearly 90% efficiency under ambient conditions and around 75% under prolonged heat and light exposure, demonstrating enhanced durability.

Beyond Solar Energy

• The same perovskite material was successfully used in memristor (resistive memory) devices.
• These devices support low-power data storage, artificial intelligence hardware, and neuromorphic computing, which mimics the functioning of the human brain.

Significance

• It supports India’s renewable energy goals under the National Solar Mission.
• It can enable low-cost, high-efficiency solar power generation.
• It can accelerate the development of energy-efficient artificial intelligence and next-generation computing systems.
• The research has already resulted in multiple patent applications and publications in the international journal Advanced Functional Materials.

Important Terms

• Perovskite: A semiconductor material known for high solar energy conversion efficiency.
• Memristor: A memory device that can store and process information simultaneously.
• Neuromorphic Computing: Computing systems inspired by the structure and functioning of the human brain.
• Semiconductor: A material whose electrical conductivity lies between a conductor and an insulator.
• Interface Engineering: Modification of material interfaces to improve device performance.

Exam Hook – Prelims Question

Q. Consider the following statements regarding Perovskite materials:

1. They are widely used in high-efficiency solar cells.
2. They have potential applications in memory storage devices.
3. They are exclusively used in the aerospace sector.

Which of the statements given above are correct?

(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

Answer: (a)

One-Line Wrap

IIT Guwahati’s breakthrough in perovskite semiconductor technology strengthens India’s capabilities in renewable energy, advanced electronics, and future artificial intelligence-driven computing systems.