Behind the Paper
The real stories behind the latest research papers, from conception to publication, the highs and the lows
Filtered by: Electrical & Electronic Engineering
High efficiency green InP quantum dot light-emitting diodes by balancing electron and hole mobility
Upon modifying cadmium-free InP quantum dot emitting layer by passivation with 1,4-butanediamine and zinc iodide, we successfully decrease electron mobility and enhances the hole transport in the InP QLED. As a result of optimizing the electrons and hole injection, it leads to green 545 nm InP QLED with a maximum quantum efficiency (EQE) of 16.3% and a current efficiency of 57.5 cd/A.
Observation of higher-order non-Hermitian skin effect
An acoustic artificial crystal based on coupled ring waveguide resonators with biased loss presents spin-polarized, higher-order non-Hermitian skin effect in two dimensions.
Achieving adjustable elasticity with non-affine to affine transition
Researchers from the Chinese University of Hong Kong discovered a topology-correlated affinity transition in both 2D and 3D packing-derived networks. Based on this transition, they reveal the strategies to build multifunctional systems with adjustable elasticity.
Plastics turn into a metal
Researchers from the University of Tokyo have developed two-dimensional hole gas in solution-processed organic semiconductors, where an apparent insulator-metal transition has been experimentally observed for the first time. These results have just been published in Nature Materials.
Graded bulk-heterojunction for the future of Organic solar cells
Graded BHJ organic solar cell with well-defined vertical phase separation has the potential to surpass the classical counterpart. Here, the authors reveal solvent selection strategies for optimising morphology of the structure, enabling efficient, eco-friendly, and scalable solar cells.
A familiar Material sets new Horizons for Analog Computing
A zero-index nanophotonic platform enables post Moore’s law analog computing with light.
The identification of handedness for single carbon nanotubes becomes possible by scientists from Peking University in China
In the past three decades, various optical spectroscopic techniques have been demonstrated to identify the chiral indices (n, m) of carbon nanotubes unequivocally even at the single-tube level. However, the accurate characterization of the handedness via optical spectroscopy has been unrealizable for single nanotubes. Here, we developed the Rayleigh scattering circular dichroism to fulfil the dream of complete structure identification of both chiral indices and handedness for single nanotubes.
