Resonant cavity phosphor

Abstract

While phosphors play an immensely important role in solid-state lighting and full-colour displays, it has been noted lately that their performance can be largely improved via structural engineering. Here, phosphor material is synergistically merged with yet another structurally engineered platform, resonant cavity (RC). When a 40-nm-thick colloidal quantum dot (CQD) film is embedded in a tailored RC with a moderate cavity quality factor (Q ≈ 90), it gains the ability to absorb the majority (~87%) of excitation photons, resulting in significantly enhanced CQD fluorescence (~29×) across a reasonably broad linewidth (~13 nm). The colour gamut covered by red and green pixels implemented using the RC phosphor—along with a broad bandwidth (~20 nm) blue excitation source—exceeds that of the sRGB standard (~121%). The simple planar geometry facilitates design and implementation of the RC phosphor, making it promising for use in real applications.

Structural basis of connexin-36 gap junction channel inhibition

“…1a, b; Supplementary Fig. S7), similar to the recently published Cx36 structure 4 . The N-terminal gating helix (NTH) is unresolved in our reconstructions (Supplementary Fig.…”

“…The development of selective inhibitors of Cx36 could be of therapeutic value. Although a structure of Cx36 has been determined recently 4 , it remains unclear how drugs inhibit the Cx36 and other Cx channels.…”

“…3 ISPSO, University of Geneva, Geneva, Switzerland. 4 Swiss Institute of Bioinformatics, University of Geneve, Geneva, Switzerland. 5 Institute of Molecular Systems Biology, ETH Zurich, Zurich, Switzerland.…”

A spiroacridine-based thermally activated delayed fluorescence emitter for high-efficiency and narrow-band deep-blue OLEDs

“…In contrast, the development of deep-blue TADF-OLEDs with high efficiency and good color purity still lags far behind. 8–11 The reason is that in order to achieve efficient and narrow-band deep-blue emission, the D and A building units need to meet the prerequisites: (1) both relatively weak D and A moieties with less electron-donating and electron-withdrawing abilities are required to form a relatively weak D–A interaction and thereby reduced intramolecular charge transfer (CT) effects, ensuring a sufficiently wide bandgap ( E 1 CT > 3.0 eV); (2) the local excited (LE) triplet state energy levels of D ( 3 LE D ) and A ( 3 LE A ) should be close to that of the 1 CT state of D–A molecules. As a result, the generated effective vibronic coupling (VC) and SOC interactions between 3 LE D/A , 3 CT and 1 CT states of emitters can facilitate the efficient RISC process; 12 (3) the D and A units should possess high structural rigidity to ensure high photoluminescence quantum efficiency (PLQY) and narrow-band emitting spectra.…”

Effect of the incorporation of gallium ions into silver indium sulfide nanocrystals

“…Furthermore, Bae et al reported that AIGS/AgGaS 2 core–shell NCs, synthesized via the hot injection method, exhibit near-unity PLQY with a narrower FWHM of 30 nm in the visible range (460–620 nm). 23 However, improving the PLQY through trial and error has been prioritized over understanding the optical emission spectra.…”