Myeongkyu Lee

Tunable structural colors have diverse applications ranging from displays and photovoltaics to surface decoration and art. A metal–insulator–metal (MIM) cavity structure formed by thin continuous layers has drawn great interest as a lithography-free and scalable optical structure to control light transmission and reflection at the surface of a material. However, the production of distinct reflection colors from the structure is challenging because the typical MIM cavity absorbs a narrow waveleng

Abstract Engineering the thermal emission of a material in the long‐wavelength infrared (IR) range is applicable to a wide variety of fields, including IR‐adaptive camouflage, information encryption, radiative cooling, energy‐saving windows, and personal thermal management. Although many different materials or structures have been proposed for these purposes, the position‐selective dynamic control of their thermal emission remains a significant challenge. Herein, a laser printing method is prese

Porosity values between 0.12 and 0.40 are achieved in a controllable way for TiO2 electrodes in dye-sensitized solar cells by irradiation with a pulsed Nd:YAG laser at 1064 nm. Whereas the electron lifetime and diffusion distance increase with reduced porosity, the amount of adsorbed dyes remains almost constant. This greatly enhances the photocurrent density and energy conversion efficiency of the solar cell. Detailed facts of importance to specialist readers are published as ”Supporting Inform

X-ray diffraction is a useful and powerful analysis technique for characterizing crystalline materials commonly employed in MSE, physics, and chemistry. This informative new book describes the principles of X-ray diffraction and its applications to materials characterization. It consists of three parts. The first deals with elementary crystallography and optics, which is essential for understanding the theory of X-ray diffraction discussed in the second section of the book. Part 2 describes how

Broadband light absorbers are highly desirable in various applications including solar-energy harvesting, thermo-photovoltaics, and photon detection. The Fabry–Perot (F–P) cavity comprising metal–insulator–metal (MIM) layers has attracted enormous interest as a lithography-free structure for realizing planar super absorbers. However, typical F–P cavity exhibits a narrow absorption band, and efforts have thus been made to increase the absorption bandwidth. This study demonstrates that near-perfec

X-ray diffraction is a useful and powerful analysis technique for characterizing crystalline materials commonly employed in MSE, physics, and chemistry. This informative new book describes the principles of X-ray diffraction and its applications to materials characterization. It consists of three parts. The first deals with elementary crystallography and optics, which is essential for understanding the theory of X-ray diffraction discussed in the second section of the book. Part 2 describes how