Two-dimensional Janus monolayers Al₂XYZ (X/Y/Z = S, Se, Te, X ≠ Y ≠ Z): first-principles insight into the photocatalytic and highly adjustable piezoelectric properties

Abstract

Janus materials possess some unique properties that are different from the symmetrical structure, which provides them with a broad application prospect. In this work, we investigated the photocatalytic and piezoelectric...

Achieving Ultimate Narrowband and Ultrapure Blue Organic Light‐Emitting Diodes Based on Polycyclo‐Heteraborin Multi‐Resonance Delayed‐Fluorescence Emitters

“…As in the case of ν‐DABNA , the τ d values obtained for BOBO‐Z , BOBS‐Z , and BSBS‐Z were significantly shorter than those for most reported MR‐TADF emitters (typically 20–200 µs). [ 12–24 ]…”

“…Recently, multi‐resonance‐induced TADF (MR‐TADF) [ 12–24 ] materials featuring fused polycyclic π‐systems have emerged as a new paradigm of organic emitters to overcome the drawbacks of conventional OLEDs, sparking a surge in research interest. In fact, as in the case of state‐of‐the‐art inorganic LEDs and quantum dot LEDs, OLEDs incorporating organoboron MR‐TADF emitters have enabled efficient narrowband EL emissions with extremely small FWHM (<40 nm), which cover a wide visible range, including deep blue, [ 12,13,15a,d,e,16,19,20a,c ] sky blue, [ 15b,d,20 ] green, [ 15c,d,17,18,20c,21 ] yellow, [ 20c,21a,22 ] and even deep red.…”

“…Recently, multi‐resonance‐induced TADF (MR‐TADF) [ 12–24 ] materials featuring fused polycyclic π‐systems have emerged as a new paradigm of organic emitters to overcome the drawbacks of conventional OLEDs, sparking a surge in research interest. In fact, as in the case of state‐of‐the‐art inorganic LEDs and quantum dot LEDs, OLEDs incorporating organoboron MR‐TADF emitters have enabled efficient narrowband EL emissions with extremely small FWHM (<40 nm), which cover a wide visible range, including deep blue, [ 12,13,15a,d,e,16,19,20a,c ] sky blue, [ 15b,d,20 ] green, [ 15c,d,17,18,20c,21 ] yellow, [ 20c,21a,22 ] and even deep red. [ 17c,20a ] In the basic design of organoboron MR‐TADF emitters, as exemplified by the renowned DABNA analogs, [ 12,13 ] a triphenylborane‐based π‐core is planarized and stabilized by connecting with nitrogen atoms to construct a B,N‐embedded rigid polycyclic framework, inducing the MR effect through mutually ortho ‐disposed boron and nitrogen atoms with opposite electronic characteristics.…”

Defect‐Mediated Synergistic Effect of POM/UiO‐66(Zr) Host–Guest Catalysts for Robust Deep Desulfurization at Ambient Temperature

“…[32][33][34][35] There have been studies on the ODS performance of PW/UiO-66(Zr). [36][37][38][39] The presence and the underlying mechanism of the synergistic effect between POM and UiO-66(Zr) as well as how to make use of the synergistic effect to boost their ODS catalytic activity, however, have not been investigated.…”

A study of the optical properties of wide bandgap oxides for a transparent photovoltaics platform

“…19 Several heterojunctions (such as NiO/ZnO, TiO 2 /Co 3 O 4 , and TiO 2 /NiO) were designed by numerous methods to improve the performance of TPV devices. 12,14,15,[20][21][22][23] Among the various factors such as structural properties, optical properties, etc., dielectric constant values of the oxide layers play a crucial role in improving device efficiency. 24 To the best of our knowledge, how the dielectric constant of various oxide-absorbing materials constitutes heterojunction TPV devices has not been reported.…”