Breakthrough in Perovskite Nanocrystals Enhances Stability for Optoelectronics

24 Feb 2025 CW Team

Among these, perovskite LEDs (PeLEDs) have emerged as a promising next-generation technology, combining the advantages of OLEDs and QLEDs. However, their commercial viability has been hindered by sensitivity to heat and moisture and colour instability due to anion migration—a process in which halide ions (chloride, bromide, or iodide) shift between quantum dots, disrupting colour consistency.

To tackle this challenge, researchers at the Centre for Nano and Soft Matter Sciences (CeNS) in Bengaluru, an autonomous institute under the Department of Science and Technology (DST), have developed a novel approach to minimize anion migration in CsPbX? perovskite nanocrystals.

Led by Dr. Pralay K. Santra, the team synthesized green light-emitting cesium lead bromide (CsPbBr?) perovskite nanocrystals using a hot injection method, where oleylamine serves as a passivating ligand. To enhance stability, they applied an argon-oxygen (Ar-O?) plasma treatment, which immobilizes surface ligands by forming a cross-linked, hydrophobic layer. This technique effectively stabilizes the ligands and slows anion exchange, dramatically improving colour stability by several orders of magnitude.

This research, published in the journal Nanoscale, provides critical insights into stabilizing perovskite nanocrystals, paving the way for high-performance, long-lasting optoelectronic devices. With enhanced thermal and moisture resistance, PeLEDs could become a mainstream solution in the future of energy-efficient lighting and display technologies.

By overcoming the core limitations of PeLEDs, this development marks a significant step forward in the advancement of next-generation lighting solutions, reinforcing India’s role as a key player in cutting-edge nanoscience and optoelectronics research.

Lighting technology has evolved dramatically over the years, from incandescent and fluorescent lamps to the widespread adoption of LEDs, which now dominate the market due to their efficiency and long lifespan. However, researchers are continuously exploring advanced lighting solutions, including OLEDs, QLEDs, and Micro/Mini-LEDs, to further enhance colour quality, energy efficiency, and durability. Among these, perovskite LEDs (PeLEDs) have emerged as a promising next-generation technology, combining the advantages of OLEDs and QLEDs. However, their commercial viability has been hindered by sensitivity to heat and moisture and colour instability due to anion migration—a process in which halide ions (chloride, bromide, or iodide) shift between quantum dots, disrupting colour consistency. To tackle this challenge, researchers at the Centre for Nano and Soft Matter Sciences (CeNS) in Bengaluru, an autonomous institute under the Department of Science and Technology (DST), have developed a novel approach to minimize anion migration in CsPbX? perovskite nanocrystals. Led by Dr. Pralay K. Santra, the team synthesized green light-emitting cesium lead bromide (CsPbBr?) perovskite nanocrystals using a hot injection method, where oleylamine serves as a passivating ligand. To enhance stability, they applied an argon-oxygen (Ar-O?) plasma treatment, which immobilizes surface ligands by forming a cross-linked, hydrophobic layer. This technique effectively stabilizes the ligands and slows anion exchange, dramatically improving colour stability by several orders of magnitude. This research, published in the journal Nanoscale, provides critical insights into stabilizing perovskite nanocrystals, paving the way for high-performance, long-lasting optoelectronic devices. With enhanced thermal and moisture resistance, PeLEDs could become a mainstream solution in the future of energy-efficient lighting and display technologies. By overcoming the core limitations of PeLEDs, this development marks a significant step forward in the advancement of next-generation lighting solutions, reinforcing India’s role as a key player in cutting-edge nanoscience and optoelectronics research.

Infrastructure Urban

11 Mar 2026

India Expands Semiconductor Training To 500 Institutions

Under the Chips to Startups programme of the India Semiconductor Mission, the Union minister responsible for Railways, Information and Broadcasting, and Electronics and IT reported notable progress in talent development. He indicated that over the past four years substantial steps have been taken towards a 10-year target of training 85,000 engineers in semiconductor design. World-class EDA tools have been deployed in 315 academic institutions across the country to provide students with practical exposure to chip design. These EDA tools are supported by leading global firms and are accessible t..

Infrastructure Urban

11 Mar 2026

Delhi Institutions Support India Semiconductor Mission

The Government of India has prioritised talent development through training, upskilling and workforce development under the Chips to Startups initiative of the India Semiconductor Mission, with officials noting progress in four years towards a 10-year target of training 85,000 engineers in semiconductor design. Electronic design automation tools provided by Synopsys, Cadence, Siemens, Renesas, Ansys and AMD have been deployed in 315 academic institutions, enabling students to gain practical chip design experience. Chips have been fabricated and tested at the Semiconductor Laboratory, Mohali, a..

Infrastructure Urban

11 Mar 2026

NHA Announces Winners Of NHCX Hackathon At IIT Hyderabad

The National Health Authority (NHA) has concluded the NHCX Hackathon under the Ayushman Bharat Digital Mission (ABDM) to stimulate innovation around the National Health Claims Exchange (NHCX). The winning teams presented their solutions at the NHCX Innovation Meet held at IIT Hyderabad during a two-day event in March 2026 that also served as the hackathon grand finale. The hackathon itself ran from 22 to 28 February 2026 and aimed to accelerate paperless, transparent claims processing across India. The event was organised with a range of ecosystem partners, including the Insurance Regulatory a..