Indirect Bandgap

A study published in the journal Science China Chemistry found that PBA3[InCl6]·H2O exhibits a special "herringbone" stacking mode that enables abundant weak interactions between organic ligands and metal halide units. While the light source with 420 nm wavelength is used for excitation, the crystals preferentially display the ultra-long triplet phosphorescent emission with 290.4 ms lifetime decay.

Scientists have developed a superlattice of semiconductor quantum dots that functions like a metal, a significant leap forward in harnessing quantum dots' full potential. The researchers achieved metal-like conductivity in this lattice, one million times greater than current quantum dot displays, wi

A rare spectroscopy technique performed at Swinburne University of Technology directly quantifies the energy required to bind two excitons together, providing for the first time a direct measurement of the biexciton binding energy in WS2.

A new paper published in Energy Material Advances explores Eu3+-Bi3+ codoping double perovskites for single-component white-light-emitting diodes.

What will GPT unlock for the nerdy kid sitting in a 7th-grade classroom today?

Lead-free halide double perovskites (DPs) have evoked great interest due to their unique optical properties. Recently, lanthanide ion (Ln3+) with rich electronic energy levels have been proposed for tailoring the optical performance of DPs toward the near-infrared (NIR) regions.

Metal-semiconductor junctions, electrical junctions in which a metal is linked to a semiconducting material, are crucial components for numerous electronic and optoelectronic devices. While they are now widely produced and used worldwide, creating good quality junctions that integrate conventional metals and 2D semiconductors can be difficult.

Diamond and graphite are two naturally occurring carbon allotropes that we have known about for thousands of years. They are elemental carbons that are arranged in a manner so that they consist of sp3 and sp2 hybridized carbon atoms, respectively. More recently, the discovery of various other carbon allotrope materials, such as graphene, fullerene, carbon nanotube, graphyne, and graphdiyne, has been revolutionizing…

UC Irvine-led research reveals that the optical properties of materials can be dramatically enhanced—not by changing the materials themselves, but by giving the light new properties.

A team of researchers has developed a new method for exfoliating MoS2 flakes that produces very large and very thin flakes with high yield. The microwave-assisted exfoliation yields 50 times more flakes than those obtained by ultrasonication and gives a material quality comparable to mechanical exfoliation. This fast process requires minimal processing and holds promise to enable new applications in electronic and…

The direct band gap of AlN-based materials makes them suitable for fabricating DUV optoelectronic devices, which have a wide range of application prospects in the fields of curing, water and air disinfection, medicine and biochemistry. Therefore, achieving a high-quality epitaxy of AlN films is of particular importance to ensure the excellent performance of DUV photoelectric devices.

In the realm of photonics, the integration of multiple optical devices onto a single substrate holds immense promise for a wide range of applications. This revolutionary approach, known as photonic integration, offers remarkable advantages, including reduced size, cost, and power consumption. Among the major integration technologies in photonics, two stand out: indium phosphide (InP)-based photonic integration and…

Researchers in Singapore have developed the world's smallest LED (light-emitting diode) that enables the conversion of existing mobile phone cameras into high-resolution microscopes. Smaller than the wavelength of light, the new LED was used to build the world's smallest holographic microscope, paving the way for existing cameras in everyday devices such as mobile phones to be converted into microscopes via only…

Weyl semimetals are topological materials whose low-energy excitations obey the Weyl equation. In a Weyl semimetal, the conduction and valence bands touch at discrete points in momentum space called Weyl nodes. Weyl nodes are monopoles of the Berry curvature and are robust under generic perturbations. The quasiparticles near the Weyl nodes are analogous to Weyl fermions in high-energy physics; they exhibit linear…

The third dimension may be responsible for preventing electronics from becoming thinner, tinier and more flexible, according to an international collaboration that developed a way to manufacture new, idealized two-dimensional semiconductor materials. They published their approach on June 3 in Nano Research.

The contributions of photon recycling and light scattering to the performance of perovskite solar cells are quantified.

And it's faaaaaab-ulous.

What happens when you expose tellurite glass to femtosecond laser light? That's the question that Gözden Torun at the Galatea Lab at Ecole Polytechnique Federale de Lausanne, in collaboration with Tokyo Tech scientists, aimed to answer in her thesis work when she made the discovery that may one day turn windows into single material light-harvesting and sensing devices. The results are published in Physical Review…

A team led by Prof. Zeng Changgan and Associate Researcher Li Lin from the University of Science and Technology (USTC) / Chinese Academy of Sciences (CAS) Key Laboratory of Strongly-Coupled Quantum Matter Physics, collaborating with Prof. Feng Ji's team from Peking University, revealed significant quantum interference effect in inter-layer transport process for the first time using graphene-based electronic…

Metal halide perovskites (MHPs) have been emerging as the rising star in the field of optoelectronics during the past decade. The state-of-the-art optoelectronic technologies based on MHPs, such as perovskite solar cells (PSCs), light emitting diodes (LEDs), photodetectors (PDs) and lasers have been leading the prevailing paradigm, owing to the intriguing optoelectronic properties of MHPs. Additionally, MHPs…