Abhishek Agrawal

TL;DR: In this article, the efficiency records of OLED devices using fluorescent, phosphorescent, and thermally activated delay fluorescent materials are summarized and a review of all the available efficiency-effective device architectural approaches, which include using thin layer structures, low carrier injection barriers, high carrier mobility, balanced carrier injection, effective carrier confinement, effective host-to-guest energy transfer, effective recombination zone, effective exciton generation on the host and p-i-n structures, and tandem structures.

TL;DR: In this article, a cross-linkable material, 3,6-bis(4-vinylphenyl)-9-ethylcarbazole (VPEC), is proposed to facilitate the injection of hole and meanwhile effectively confine electron to realize, for example, high efficiency organic light-emitting diodes, especially at high luminance.

TL;DR: In this article, a universal and easy-to-apply index for quantifying the quality of any given lighting source, which is based on direct comparison of its lumen spectrum with the natural light counterpart having the same color temperature, is presented.

TL;DR: In this article, the authors used scanning tunneling microscopy to study the initial stage of oxidation for H2O exposed Si(100), and showed that the density of split dimer defects correlates with the c-type defect density.

TL;DR: In this article, an all-weather pseudo-natural light is demonstrated based on a high number of broad-band emitters, which can exhibit a 92-96% similarity with the sunlight from dawn to dusk, and a color gamut of 80% in terms of NTSC.