An all-polymer photonic crystal slab sensor is presented, and shown to exhibit narrow resonant reflection with a FWHM of less than 1 nm and a sensitivity of 31 nm/RIU when sensing media with refractive indices around that of water. This results in a detection limit of 4.5 × 10(-6) RIU when measured in conjunction with a spectrometer of 12 pm/pixel resolution. The device is a two-layer structure, composed of a low refractive index polymer with a periodically modulated surface height, covered with a smooth upper-surface high refractive index inorganic-organic hybrid polymer modified with ZrO2based nanoparticles. Furthermore, it is fabricated using inexpensive vacuum-less techniques involving only UV nanoreplication and polymer spin-casting, and is thus well suited for single-use biological and refractive index sensing applications.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OE.23.016529 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
understanding on the formation of fibrillar morphology in green solvent processed all-polymer solar cells.
Natl Sci Rev
December 2024
Department of Electrical and Electronic Engineering, Research Institute for Smart Energy (RISE), Photonic Research Institute (PRI), The Hong Kong Polytechnic University, Hong Kong 999077, China.
Article Synopsis
- Researchers are investigating solid additive engineering to improve the efficiency of all-polymer solar cells (all-PSCs) for various applications.
- The study focuses on how naphthalene-derived solid additives can help reduce polymer aggregate formation during the initial spin-coating stage, allowing better structure formation for higher power conversion efficiency (PCE).
- A new ternary all-polymer system based on these findings has been developed, achieving top-tier PCEs in both small and large device areas while maintaining good stability.
High-Detectivity All-Polymer Photodiode Empowers Smart Vitality Surveillance and Computational Imaging Rivaling Silicon Diodes.
Adv Mater
September 2024
Department of Electrical and Electronic Engineering, Research Institute for Smart Energy (RISE), Photonics Research Institute (PRI), The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, P. R. China.
Near-infrared (NIR) organic photodetectors (OPDs), particularly all-polymer-based ones, hold substantial commercial promise in the healthcare and imaging sectors. However, the process of optimizing their active layer composition to achieve highly competitive figures of merit lacks a clear direction and methodology. In this work, celebrity polymer acceptor PY-IT into a more NIR absorbing host system PBDB-T:PZF-V, to significantly enhance the photodetection competence, is introduced.
View Article and Find Full Text PDFPrecisely Controlling Polymer Acceptors with Weak Intramolecular Charge Transfer Effect and Superior Coplanarity for Efficient Indoor All-Polymer Solar Cells with over 27% Efficiency.
Adv Mater
August 2024
Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, 999077, Hong Kong.
Indoor photovoltaics (IPVs) are garnering increasing attention from both the academic and industrial communities due to the pressing demand of the ecosystem of Internet-of-Things. All-polymer solar cells (all-PSCs), emerging as a sub-type of organic photovoltaics, with the merits of great film-forming properties, remarkable morphological and light stability, hold great promise to simultaneously achieve high efficiency and long-term operation in IPV's application. However, the dearth of polymer acceptors with medium-bandgap has impeded the rapid development of indoor all-PSCs.
View Article and Find Full Text PDFEfficient and Stable All-Polymer Solar Cells Enabled by Dual Working Mechanism.
Small
July 2024
College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, China.
Ternary strategy with integration characteristics and adaptability is a simple and effective method for blooming of the performance of photovoltaic devices. Herein, a novel wideband gap polymer donor PBB2-Hs is synthesized as the guest component to optimize all-polymer solar cells (all-PSCs). High-energy photon absorption and long exciton lifetime of PBB2-Hs constitute efficient energy transfer.
View Article and Find Full Text PDFHigh-directivity far-field radiation of quantum dot-based single-photon emitter coupled to polymeric circular waveguide resonant grating.
Nanotechnology
January 2024
Université Paris-Saclay, ENS Paris-Saclay, CNRS, LuMIn, 91190, Gif-sur-Yvette, France.
Solid-state single-photon emitters (SPEs) commonly encounter the limitation of quasi-omnidirectional radiation patterns, which poses challenges in utilizing their emission with conventional optical instruments. In this study, we demonstrate the tailoring of the far-field radiation patterns of SPEs based on colloidal quantum dots (QDs), both theoretically and experimentally, by employing a polymer-based dielectric antenna. We introduce a simple and cost-effective technique, namely low one-photon absorption direct laser writing, to achieve precise coupling of a QD into an all-polymer circular waveguide resonance grating.
View Article and Find Full Text PDFWant 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!