Self-assembled organic-inorganic CH3NH3PbI3 perovskite microwires (MWs) upon humidity exposure along several weeks were investigated by photoluminescence (PL) spectroscopy, Raman spectroscopy, and X-ray diffracti...
Authors: Rubén Segovia, Geyang Qu, Miao Peng, Xiudong Sun, Hongyan Shi and Bo Gao
The atomic, electronic, and magnetic properties of vacancy structures with triangular shape related to their growth in single hexagonal boron nitride (h-BN) sheet are investigated using density functional theory ...
Misaligned edge-to-edge dimers are the common products during the preparation of Ag nanoprism dimers using self-assembly method. However, in the self-assembly method, Ag nanoprisms are easily truncated because...
Authors: Hanning Yang, Edgar Oduor Owiti, Xiangqian Jiang, Siren Li, Peng Liu and Xiudong Sun
We investigate the ferroelectric state of a tetragonal BiFeO3 thin film grown on a LaAlO3 (001) substrate using an optical second harmonic generation (SHG) microscope. Whereas the ferroelectric state of this mate...
Authors: Chang Jae Roh, Sun Young Hamh, Chang-Soo Woo, Kwang-Eun Kim, Chan-Ho Yang and Jong Seok Lee
The multi-functional nanomaterial constructed with more than one type of materials has gained a great attention due to its promising application. Here, a high white light photodetector prototype established wi...
Authors: Jinyang Liu, Qingqing Huang, Kun Zhang, Yangyang Xu, Mingzhu Guo, Yongqiang Qian, Zhigao Huang, Fachun Lai and Limei Lin
We report on a thickness-dependent wetting property of WS2/Al2O3 and WS2/SiO2/Si structures. We prepared WS2 films with gradient thickness by annealing thickness-controlled WO3 films at 800 °C in sulfur atmospher...
Authors: Byoung Ki Choi, In Hak Lee, Jiho Kim and Young Jun Chang
Transmission characteristics of periodically surface-corrugated long-period gratings (LPGs) inscribed on photonic crystal fibers (PCFs) using a wet-etching technique were experimentally investigated. A convent...
Five percent of Fe-doped ZnO (ZnO:Fe) thin films were deposited on Pt/TiO2/SiO2/Si substrates by a spin-coating method. The films were annealed without (ZnO:Fe-0T) and with a pulsed magnetic field of 4 T (ZnO:Fe-...
Authors: Hongtao Xu, Changjin Wu, Zhao Xiahou, Ranju Jung, Ying Li and Chunli Liu
Oxygen vacancies have a profound effect on the magnetic, electronic, and transport properties of transition metal oxide materials. Here, we studied the influence of oxygen vacancies on the magnetoresistance (M...
Authors: Umasankar Dash, Susant Kumar Acharya, Bo Wha Lee and Chang Uk Jung
We investigated the influence of metal coating on the optical characteristics of Si nanopillar (NP) arrays with and without thin metal layers coated on the sample surface. The reflection dips of the metal-coat...
Authors: Sujung Kim, Eunah Kim, Yeon Ui Lee, Eunkyo Ko, Hyeong-Ho Park, Jeong Weon Wu and Dong-Wook Kim
InN nanocolumn arrays were grown on c-plane sapphire with and without anodic aluminum oxide (AAO) nanotemplates. The crystalline quality of InN nanocolumns was significantly improved by selective-area growth (...
Authors: Xiao Wang, Guozhen Zhang, Yang Xu, Hao Wu and Chang Liu
Oxygen vacancy (VO) strongly affects the properties of oxides. In this study, we used X-ray diffraction (XRD) to study changes in the VO concentration as a function of the Co-doping level of ZnO. Rietveld refinem...
Authors: Ji Hun Park, Yeong Ju Lee, Jong-Seong Bae, Bum-Su Kim, Yong Chan Cho, Chikako Moriyoshi, Yoshihiro Kuroiwa, Seunghun Lee and Se-Young Jeong
To date, electric fields have been widely used to control the magnetic properties of BiFeO3-based antiferromagnet/ferromagnet heterostructures through application of an exchange bias. To extend the applicability ...
Authors: Kil Dong Sung, Tae Kwon Lee and Jong Hoon Jung
Ultrasmall microring and microdisk lasers with an asymmetric air/GaAs/Al0.98Ga0.02As waveguide and an active region based on InAs/InGaAs/GaAs quantum dots emitting around 1.3 μm were fabricated and studied. The d...
Authors: Mikhail V Maximov, Natalia V Kryzhanovskaya, Alexey M Nadtochiy, Eduard I Moiseev, Ivan I Shostak, Andrey A Bogdanov, Zarina F Sadrieva, Alexey E Zhukov, Andrey A Lipovskii, Denis V Karpov, Janne Laukkanen and Juha Tommila
Indium gallium nitride (InGaN) samples with single heterojunction (SH) and double heterojunction (DH) were prepared using metal-organic chemical vapor deposition. SH has a layer of InGaN thin film (thicknesses...
Authors: Yung-Sheng Chen, Che-Hao Liao, Chie-Tong Kuo, Raymond Chien-Chao Tsiang and Hsiang-Chen Wang
A scattering layer is utilized by mixing nanoporous spheres and nanoparticles in ZnO-based dye-sensitized solar cells. Hundred-nanometer-sized ZnO spheres consisting of approximately 35-nm-sized nanoparticles ...
Authors: Chohui Kim, Hongsik Choi, Jae Ik Kim, Sangheon Lee, Jinhyun Kim, Woojin Lee, Taehyun Hwang, Suji Kang, Taeho Moon and Byungwoo Park
Transparent conductive current-spreading layer is important for quantum efficiency and thermal performance of light-emitting diodes (LEDs). The increasing demand for tin-doped indium oxide (ITO) caused the pri...
Authors: Xia Guo, Chun Wei Guo, Yuan Hao Jin, Yu Chen, Qun Qing Li and Shou Shan Fan
The excitation and absorption properties of grating coupled graphene surface plasmons were studied. It was found that whether a mode can be excited is mainly determined by the frequency of incident light and t...
Authors: Haiming Yuan, Hanning Yang, Pengzi Liu, Xiangqian Jiang and Xiudong Sun
The effect of metal particles on the photoluminescence (PL) and the Raman spectra of functionalized SWCNTs in aqueous solutions was systematically investigated by studying three different metal particles (gold...
Authors: Se-Jin Kim, June Park, Yuhyun Jeong, Hayoung Go, Kangseok Lee, Seunghun Hong and Maeng-Je Seong
Light extraction efficiency (LEE) of AlGaN-based nanorod deep ultraviolet (UV) light-emitting diodes (LEDs) is numerically investigated using three-dimensional finite-difference time-domain simulations. LEE of...
According to first-principles calculations, the solubility of Mg as a substitute for Ga or Al in AlxGa1 – xN bulk is limited by large, positive formation enthalpies. In contras...
Authors: Tongchang Zheng, Wei Lin, Duanjun Cai, Weihuang Yang, Wei Jiang, Hangyang Chen, Jinchai Li, Shuping Li and Junyong Kang
We experimentally investigated a simple and new technique for the fabrication of micro-ridge long-period gratings (MRLPGs) based on polarization-maintaining fibers (PMFs). The cladding region of the PMFs was e...
Authors: Oh-Jang Kwon, Myungjun Shin and Young-Guen Han
Mg-doped ZnS hierarchical spheres have been synthesized via hydrothermal method using mixed solvents of ethylenediamine and DI water without any surface-active agent. The surface morphology and microstructure ...
Authors: Devulapalli Amaranatha Reddy, Deok Hyeon Kim, Seuk Joo Rhee, Bo Wha Lee and Chunli Liu
To date, fabricating three-dimensional (3D) nanostructured substrate with small nanogap was a laborious challenge by conventional fabrication techniques. In this article, we address a simple, low-cost, large-a...
Authors: Zhendong Zhu, Qunqing Li, Benfeng Bai and Shoushan Fan
Stacked precursors of Cu-Zn-Sn-S were grown by radio frequency sputtering and annealed in a furnace with Se metals to form thin-film solar cell materials of Cu2ZnSn(S,Se)4 (CZTSSe). The samples have different abs...
Authors: Gee Yeong Kim, Ju Ri Kim, William Jo, Dae-Ho Son, Dae-Hwan Kim and Jin-Kyu Kang
