Perovskite lasers

Researchers at Chongqing Normal University and Monash University recently developed a new type of perovskite material - by assembling cesium lead bromide (CsPbBr₃) nanocrystals into highly ordered “supercrystals,” the team harnessed collective excitonic effects that overcome a key limitation of conventional perovskite nanocrystals - biexciton Auger recombination.

In traditional colloidal perovskite nanocrystals (NCs), lasing efficiency is limited by the rapid nonradiative decay of biexcitons, which restricts optical gain and shortens emission lifetimes. The new supercrystal architecture tackles this problem at the structural level rather than by changing chemical composition. Within the dense and periodic superlattice, excitons - bound electron–hole pairs generated by light - interact cooperatively across multiple nanocrystals. This collective behavior allows excitations to delocalize, suppressing energy losses and enabling far more efficient light amplification.

Perovskite-Info is happy to announce an update to our Perovskite for the Display Industry Market Report. This market report, brought to you by the world's leading perovskite and OLED industry experts, is a comprehensive guide to next-generation perovskite-based solutions for the display industry that enable efficient, low cost and high-quality display devices. The report is now updated to January 2026, with all the latest commercial and research activities.

Reading this report, you'll learn all about:

• Perovskite materials and their properties
• Perovskite applications in the display industry
• Perovskite QDs for color conversion
• Prominent perovskite display related research activities

The report also provides a list of perovskite display companies, datasheets and brochures of pQD film solutions, an introduction to perovskite materials and processes, an introduction to emerging display technologies and more.

Researchers from China's Zhejiang University, Wenzhou University, Central South University and Denmark's Aalborg University have developed an energy‑efficient way to engineer perovskite nanocrystals in glass, unlocking stable, flexible random lasers for advanced photonic applications. 

Schematic illustration of experimental setup for speckle-free laser imaging. Image from: Science Advances

By using low‑temperature thermal strategies far below the glass transition temperature, they precisely tune nanophase separation and ion distribution inside perovskite nanocrystal domains, achieving controllable photoluminescence and lasing behavior in glass composites. Through carefully controlled nanophase separation and crystallization, the team creates hierarchical “PNCs‑in‑glass” structures that dramatically boost light scattering, enabling continuous‑wave single‑mode random lasing with an ultralow threshold of just 52.6 milliwatts per square centimeter. 

Researchers from The Hong Kong Polytechnic University, The University of Hong Kong, Pohang University of Science and Technology (POSTECH), City University of Hong Kong and Nankai University recently developed a new 3D printing technology for perovskite nanolasers that can be densely integrated onto semiconductor chips - capable of processing information in spaces thinner than a human hair.

Conventional semiconductor manufacturing techniques, such as lithography, excel at mass-producing identical structures but have key drawbacks: they are complex, costly, and limit design flexibility in shaping or positioning devices. Furthermore, most traditional lasers are built as flat, horizontal structures on a substrate, which occupy significant space and experience reduced efficiency due to light leakage. To overcome these challenges, the researchers engineered a method to vertically stack perovskite nanostructures, forming pillar-shaped vertical nanolasers that achieve both compactness and optical efficiency. The printing process precisely controls attoliter-scale ink droplets using an applied voltage, enabling direct, on-demand fabrication of high-performance nanostructures without complex subtractive steps.

Semiconductor lasers are key for information technologies, but traditional methods are complex and expensive. Solution-processed materials like organics, quantum dots, and especially perovskites offer low-cost integration with silicon. While perovskites can achieve low-threshold lasing with optical pumping, making them work with electrical driving—the practical standard for real-world lasers—remains a challenge despite significant research efforts.

a) Schematic of the device. b) A cross-sectional schematic of the device structure (left), and high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) images of a device (layer thicknesses unoptimized) (right). Image credit: Nature

Zhejiang University researchers have now reported an electrically driven perovskite laser, constructed by vertically integrating a low-threshold single-crystal perovskite microcavity sub-unit with a high-power microcavity perovskite LED (PeLED) sub-unit. 

Engineers have long aimed to create small, efficient lasers for silicon chips, crucial for advanced optical communications and computing. Traditional lasers use expensive III-V semiconductors, which are hard to integrate with silicon. All-inorganic perovskite films offer a cheaper, versatile alternative with strong optical properties. However, a key challenge is that at room temperature, perovskite lasers struggle to operate continuously, as they quickly lose charge carriers due to Auger recombination.

Researchers from Zhejiang University and Shanxi‐Zheda Institute of Advanced Materials and Chemical Engineering have developed a simple method to overcome this challenge, leading to record-setting performance for perovskite lasers under near-continuous operation. The new approach uses a volatile ammonium additive during the annealing process of polycrystalline perovskite films. This additive triggers a “phase reconstruction” that removes unwanted low-dimensional phases, reducing channels that accelerate Auger recombination. The result is a pure 3D structure that better preserves the charge carriers needed for lasing, without adding significant optical loss.

Researchers from China's Dalian University of Technology, University of Hong Kong and HKU-SIRI have achieved low-threshold, wide-wavelength tunable single-mode laser emission in the near-infrared (NIR) by combining phase-change perovskite with the traditional vertical-cavity surface-emitting laser (VCSEL) structure. 

Schematic of a tunable microlaser based on phase-change perovskite gain medium, sandwiched between Au mirror and DBR reflector sitting on a quartz glass substrate, pumped by blue-violet laser (λ = 405 nm) and emitting a tunable beam in the near-IR from 790.7 nm to 799.5 nm. Image from: Opto-Electronic Advances

As an important light source, lasers are widely used in many fields such as communications, medical treatment, display technology and scientific research. However, the continuous advancement of technology means higher requirements from the performance of lasers, especially in terms of integration and tunability. Traditional lasers typically rely on fixed gain media and external microcavity structures (such as Fabry-Perot cavities, photonic crystals, whispering galleries, etc.). Although these structures can achieve efficient laser emission, their operating wavelengths are often fixed, which makes it difficult to meet the needs of modern science and technology for tunability. Therefore, the development of a laser that can achieve low-threshold laser emission and is tunable over a wide wavelength range has become one of the current research focuses.

Perovskite-Info is proud to announce an update to our Perovskite for the Display Industry Market Report. This market report, brought to you by the world's leading perovskite and OLED industry experts, is a comprehensive guide to next-generation perovskite-based solutions for the display industry that enable efficient, low cost and high-quality display devices. The report is now updated to February 2025, with all the latest commercial and research activities.

Reading this report, you'll learn all about:

• Perovskite materials and their properties
• Perovskite applications in the display industry
• Perovskite QDs for color conversion
• Prominent perovskite display related research activities

The report also provides a list of perovskite display companies, datasheets and brochures of pQD film solutions, an introduction to perovskite materials and processes, an introduction to emerging display technologies and more.

Spin-polarized lasers have been found superior to conventional lasers in many aspects of both performance and functionality. Hybrid organic-inorganic perovskites are emerging spintronic materials with great potential for advancing spin-polarized laser technology, but the rapid carrier spin relaxation process in hybrid perovskites presents a major bottleneck for spin-polarized lasing. Now, researchers at the Chinese Academy of Sciences (CAS) and Beijing Normal University have identified and successfully suppressed the spin relaxation mechanism in perovskites for the experimental realization of spin-polarized perovskite lasers. 

The electron-hole exchange interaction was identified as the decisive spin relaxation mechanism hindering the realization of spin-polarized lasing in perovskite microcrystals. Consequently, an ion doping strategy was employed to introduce a new energy level in perovskites, which enables a long carrier spin lifetime by suppressing the electron-hole exchange interaction. 

Researchers at North Carolina State University and Brookhaven National Laboratory have reported a technique for engineering layered hybrid perovskites (LHPs) down to the atomic level, which enables precise control on how the materials convert electrical charge into light. 

Image credit: Matter

The technique opens the door to engineering materials tailored for use in next-generation printed LEDs, lasers and photovoltaic devices.