Perovskite lasers - Page 2

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.

Researchers from China's Hunan University of Technology and Business, University of Macau and East China Normal University have developed a single-mode double-pulsed nanolaser utilizing self-assembled perovskite multiple quantum wells (MQWs).

The recent study presents a novel approach to achieving pulse-doubling in perovskite nanowire lasers. This research aims to enhance the understanding of laser dynamics and energy relaxation mechanisms in these advanced materials.

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 July 2024, with all the latest commercial and research activity - including 9 new research papers, new company, new brochures, and commercial updates and more!

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.

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 2024, with all the latest commercial and research activity. This was a major version, with over 15 updates, new companies and new technologies covered.

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 at Pusan National University and the University of Oxford have made an advanced in the field of perovskite nanosheets as promising new laser materials. The team overcame the inherent limitations of CsPbBr quantum dots using perovskite nanosheets, which provide enhanced light amplification abilities. 

The researchers introduced an innovative waveguide pattern, which increased the gain and thermal stability of the perovskite nanosheets. This pattern improved the optical confinement and heat dissipation, offering a solution to the limitations previously faced with quantum dots. The research team also pioneered a new ‘gain analysis’ method known as the ‘gain contour’. This novel technique provides a more in-depth understanding of gain saturation across various spectrum energies and optical stripe lengths.

Researchers at Imec have reported a metal halide perovskite LED (PeLED) stack that emits 1,000x more light “than state-of-the-art OLEDs”. The team developed a transparent PeLED architecture, that combines low optical losses with excellent current-injection properties. 

In this work, the team showed that perovskite semiconductor optical amplifiers and injection lasers are within reach using this type of transparent PeLED.