Full‐Color Inorganic Carbon Dot Phosphors for White‐Light‐Emitting Diodes Tập 5 Số 19 - 2017
Zhen Tian, Xutao Zhang, Di Li, Ding Zhou, Pengtao Jing, Dezhen Shen, Songnan Qu, Radek Zbořil, Andrey L. Rogach
Light‐emitting carbon dots (CDots) are widely investigated due to their distinct merits. However, it is still a challenge to modulate their bandgap emissions and conquer their aggregation‐induced luminescence quenching to achieve full‐color highly emissive CDot‐based phosphors. Herein, this study proposes an approach toward realization of full‐color emissive CDots from two common precursor...... hiện toàn bộ A Hybridized Local and Charge‐Transfer Excited State for Highly Efficient Fluorescent OLEDs: Molecular Design, Spectral Character, and Full Exciton Utilization Tập 2 Số 9 - Trang 892-901 - 2014
Weijun Li, Yuyu Pan, Liang Yao, Haichao Liu, Shitong Zhang, Chu Wang, Fangzhong Shen, Ping Lü, Bing Yang, Yuguang Ma
For a donor–acceptor (D–A) molecule, there are three possible cases for its low‐lying excited state (S1): a π–π* state (a localized electronic state), a charge‐transfer (CT) state (a delocalized electronic state), and a mixed or hybridized state of π–π* and CT (named here as the hybridized local and charge transfer (HLCT) state). The HLCT state is an important excited ...... hiện toàn bộ Solvothermal Synthesis and Ultrafast Photonics of Black Phosphorus Quantum Dots Tập 4 Số 8 - Trang 1223-1229 - 2016
Yanhua Xu, Zhiteng Wang, Zhinan Guo, Hao Huang, Quanlan Xiao, Han Zhang, Xue‐Feng Yu
Ultrasmall black phosphorus quantum dots (BPQDs) with an average size of 2.1 ± 0.9 nm are synthesized by using a solvothermal method in a N‐methyl‐2‐pyrrolidone solution. Verified by femto‐second laser Z‐scan measurement, BPQDs exhibit excellent nonlinear optical response with a modulation depth of about 36% and a saturable intensity of about 3.3 GW cm−...... hiện toàn bộ Toward Smart and Ultra‐efficient Solid‐State Lighting Tập 2 Số 9 - Trang 809-836 - 2014
Jeffrey Y. Tsao, Mary H. Crawford, Michael E. Coltrin, Arthur Fischer, Daniel Koleske, Ganapathi Subramania, George T. Wang, Jonathan J. Wierer, R. F. Karlicek
Solid‐state lighting has made tremendous progress this past decade, with the potential to make much more progress over the coming decade. In this article, the current status of solid‐state lighting relative to its ultimate potential to be “smart” and ultra‐efficient is reviewed. Smart, ultra‐efficient solid‐state lighting would enable both very high “effective” efficiencies and potentially...... hiện toàn bộ Self‐Powered Photodetectors Based on 2D Materials Tập 8 Số 1 - 2020
Hui Qiao, Zongyu Huang, Xiaohui Ren, Shuhua Liu, Yupeng Zhang, Xiang Qi, Han Zhang
AbstractSelf‐powered photodetectors are considered as a new type of photodetectors enabling self‐powered photodetection without external power. The excellent photoresponsivity, fast photoresponse rate, low dark current, and large light on/off ratio of these photodetectors have attracted wide interest among scholars. 2D materials are widely used in self‐powered phot...... hiện toàn bộ Photoluminescent Materials for Solid‐State Lighting: State of the Art and Future Challenges Tập 3 Số 4 - Trang 424-430 - 2015
J Meyer, Frank Tappe
The efficient generation of white light by phosphor‐converted LEDs (pcLEDs) suffers from a trade‐off between high color rendition, low correlated color temperatures, and luminous efficacy. While this is partially an inherent problem, it is also caused by the spectral efficiency of the materials used. The particular challenges for materials research lie, amongst the demanding general requir...... hiện toàn bộ Anomalous Terahertz Reflection and Scattering by Flexible and Conformal Coding Metamaterials Tập 3 Số 10 - Trang 1374-1380 - 2015
Lanju Liang, Mei-Qing Qi, Jing Yang, Xiaopeng Shen, Ji-Quan Zhai, Weizong Xu, Biaobing Jin, Weiwei Liu, Yijun Feng, Caihong Zhang, Hai Lu, Hou‐Tong Chen, Lin Kang, Weiwei Xu, Jian Chen, Tie Jun Cui, Peiheng Wu, Shenggang Liu
Arbitrary control of terahertz (THz) waves remains a significant challenge although it promises many important applications. Here, a method to tailor the reflection and scattering of THz waves in an anomalous manner by using 1‐bit coding metamaterials is presented. Specific coding sequences result in various THz far‐field reflection and scattering patterns, ranging from a single beam to tw...... hiện toàn bộ Tunable Emissions of Upconversion Fluorescence for Security Applications Tập 7 Số 6 - 2019
Weijing Yao, Qingyong Tian, Wei Wu
AbstractThe rampant appearance of counterfeiting has a serious adverse effect on every aspect in the global markets. Thus, the development of high‐tech security strategies has become an urgent challenge. Recently, lanthanide ions (Ln3+) doped materials open new avenues for concealing factual data and shield against counterfeiting because of the...... hiện toàn bộ