Rare-earth materials are widely used in the optical field due to their rich energy-level structures, and if endowed with photoelectric response characteristics, they are expected to be applied to photoelectric multifunctional devices. In this paper, Ho- and Yb-codoped KNaNbO (KNN) ferroelectric ceramics are synthesized, and the up-conversion and down-conversion luminescence intensity as well as the decay degree after photochromism can be controlled by the content of Yb. Strong green luminescence visible to the naked eye is realized, and the maximum luminescence decay is more than 50%. 2 s of color change fully indicates that the ceramic has the characteristics of fast response photochromic, under the most efficient wavelength of 405 nm by changing the irradiation wavelength. By incorporating data from thermal and electrical stimulation experiments, a comprehensive photochromic mechanism diagram is constructed, where the photochromic properties are predominantly governed by defects. It is believed that this work will provide a theoretical basis for the design of high-performance photochromic ceramics.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.inorgchem.4c04002 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Advanced Design for Stimuli-Reversible Chromic Wearables With Customizable Functionalities.
Adv Mater
December 2024
Nanotechnology Center, School of Fashion and Textiles, The Hong Kong Polytechnic University Hung Hom, Kowloon, Hong Kong, 999077, China.
Smart wearable devices with dynamically reversible color displays are crucial for the next generation of smart textiles, and promising for bio-robots, adaptive camouflage, and visual health monitoring. The rapid advancement of technology brings out different categories that feature fundamentally different color-reversing mechanisms, including thermochromic, mechanochromic, electrochromic, and photochromic smart wearables. Although some reviews have showcased relevant developments from unique perspectives, reviews focusing on the advanced design of flexible chromic wearable devices within each category have not been reported.
View Article and Find Full Text PDFExploring the molecular design principles for efficient diarylethene photoacid and photohydride generators based on the photochemical reaction mechanism.
Chem Sci
December 2024
Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University Xi'an 710119 China
Photoacid generators (PAGs) and photohydride generators (PHGs) are specific photolabile protecting groups that release acid and hydride, respectively. Over the past decade, great efforts have been devoted to developing novel PAGs and PHGs with advanced efficiency, among which, two of the promising candidates are diarylethene (DAE)-based PAGs and PHGs, which release acids/hydrides during photochromic electrocyclization. The release quantum yield for PAGs is acceptable, while that of PHGs is only 4.
View Article and Find Full Text PDFConduction band photonic trapping band gap reversal of brookite quantum dots using controlled graphitization for tuning a multi-exciton photoswitchable high-performance semiconductor.
Nanoscale
December 2024
Soft Foundry Institute, College of Engineering, Seoul National University, Seoul, Republic of Korea.
Brookite exists as the metastable phase of titania and often mediates the transformation of anatase to rutile. The photocatalytic competence of brookite relative to polymorphs anatase and rutile has generally been considered structurally and energetically unfavourable for reasons that remain largely unknown and unchallenged. However, the process of phase transformation and performance related cooperativity among all three polymorphs has recently unlocked alternative directions for exploring brookite photovoltaics.
View Article and Find Full Text PDFPhotoelectric Interaction and Photochromic Mechanism of KNaNbO Ceramics.
Inorg Chem
November 2024
College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China.
Rare-earth materials are widely used in the optical field due to their rich energy-level structures, and if endowed with photoelectric response characteristics, they are expected to be applied to photoelectric multifunctional devices. In this paper, Ho- and Yb-codoped KNaNbO (KNN) ferroelectric ceramics are synthesized, and the up-conversion and down-conversion luminescence intensity as well as the decay degree after photochromism can be controlled by the content of Yb. Strong green luminescence visible to the naked eye is realized, and the maximum luminescence decay is more than 50%.
View Article and Find Full Text PDFBeyond Photochromism: Alternative Stimuli to Trigger Diarylethenes Switching.
Adv Sci (Weinh)
December 2024
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China.
Article Synopsis
- Diarylethenes (DAEs) are highly stable and fatigue-resistant photochromic materials used in various fields like molecular devices and bioimaging, primarily functioning as photo-switches.
- Recent studies are exploring non-light-driven methods, such as heat, acid, and electrochemistry, to induce isomerization in DAEs, allowing for enhanced functionality in complex operations and data storage.
- The review highlights advancements in DAE systems from perspectives of acidochromism, thermochromism, and electrochromism, discussing design strategies, mechanisms, applications, and future challenges in developing multi-stimuli responsive DAE switches.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!