Nanjing Tech University

About: Nanjing Tech University is a education organization based out in Nanjing, China. It is known for research contribution in the topics: Catalysis & Membrane. The organization has 21827 authors who have published 21794 publications receiving 364050 citations. The organization is also known as: Nangongda & Nánjīng Gōngyè Dàxúe.

High‐Performance Perovskite Light‐Emitting Diode with Enhanced Operational Stability Using Lithium Halide Passivation

Abstract: Defect passivation has been demonstrated to be effective in improving the radiative recombination of charge carriers in perovskites, and consequently, the device performance of the resultant perovskite light-emitting diodes (LEDs). State-of-the-art useful passivation agents in perovskite LEDs are mostly organic chelating molecules that, however, simultaneously sacrifice the charge-transport properties and thermal stability of the resultant perovskite emissive layers, thereby deteriorating performance, and especially the operational stability of the devices. We demonstrate that lithium halides can efficiently passivate the defects generated by halide vacancies and reduce trap state density, thereby suppressing ion migration in perovskite films. Efficient green perovskite LEDs based on all-inorganic CsPbBr3 perovskite with a peak external quantum efficiency of 16.2 %, as well as a high maximum brightness of 50 270 cd m-2 , are achieved. Moreover, the device shows decent stability even under a brightness of 104 cd m-2 . We highlight the universal applicability of defect passivation using lithium halides, which enabled us to improve the efficiency of blue and red perovskite LEDs.

C-F Bond Cleavage Enabled Redox-Neutral [4+1] Annulation via C-H Bond Activation.

Abstract: Using α,α-difluoromethylene alkyne as a nontraditional one-carbon reaction partner, a synthetically novel method for the construction of isoindolin-1-one derivatives via Rh(III)-catalyzed [4+1] annulation reaction is reported. The 2-fold C–F bond cleavage not only enables the generation of desired product under an overall oxidant-free condition but also results in a net migration of carbon–carbon triple bond. In addition, the present reaction protocol exhibits a tolerance of a wide spectrum of functional groups due to the mild reaction conditions employed.

Biodegradable Charge-Transfer Complexes for Glutathione Depletion Induced Ferroptosis and NIR-II Photoacoustic Imaging Guided Cancer Photothermal Therapy

Abstract: Suffering from the laborious synthesis and undesirable tumor microenvironment response, the exploitation of novel NIR-II absorbing organic photothermal agents is of importance to promote phototherapeutic efficacy. Herein, two kinds of charge-transfer complex nanoparticles (TMB-F4TCNQ and TMB-TCNQ) are prepared by supramolecular assembly. Because of the larger energy gap between donor and acceptor, TMB-F4TCNQ presents higher charge-transfer degree (72 %) than that of TMB-TCNQ (48 %) in nanoaggregates. Therefore, TMB-F4TCNQ exhibits stronger NIR-II absorption ability with a mass extinction coefficient of 15.4 Lg-1 cm-1 at 1300 nm and excellent photothermal effect. Impressively, the specific cysteine response can make the TMB-F4TCNQ effectively inhibit the intracellular biosynthesis of GSH, leading to redox dsyhomeostasis and ROS-mediated ferroptosis. TMB-F4TCNQ can serve as a contrast agent for NIR-II photoacoustic imaging to guide precise and efficient photothermal therapy in vivo.