Interface strains and lattice distortion are inevitable issues during perovskite crystallization. Silane as a coupling agent is a popular connector to enhance the compatibility between inorganic and organic materials in semiconductor devices. Herein, a protonated amine silane coupling agent (PASCA‐Br) interlayer between TiO2 and perovskite layers is adopted to directionally grasp both of them by forming the structural component of a lattice unit. The pillowy alkyl ammonium bromide terminals at the upper side of the interlayer provide well‐matched growth sites for the perovskite, leading to mitigated interface strain and ensuing lattice distortion; meanwhile, its superior chemical compatibility presents an ideal effect on healing the under‐coordinated Pb atoms and halogen vacancies of bare perovskite crystals. The PASCA‐Br interlayer also serves as a mechanical buffer layer, inducing less cracked perovskite film when bending. The developed molecular‐level flexible interlayer provides a promising interfacial engineering for perovskite solar cells and their flexible application.

Metal halide perovskite semiconductors have demonstrated remarkable potentials in solution‐processed blue light‐emitting diodes (LEDs). However, the unsatisfied efficiency and spectral stability responsible for trap‐mediated non‐radiative losses and halide phase segregation remain the primary unsolved challenges for blue perovskite LEDs. In this study, it is reported that a fluorene‐based π‐conjugated cationic polymer can be blended with the perovskite semiconductor to control film formation and optoelectronic properties. As a result, sky‐blue and true‐blue perovskite LEDs with Commission Internationale de l'Eclairage coordinates of (0.08, 0.22) and (0.12, 0.13) at the record external quantum efficiencies of 11.2% and 8.0% were achieved. In addition, the mixed halide perovskites with the conjugated cationic polymer exhibit excellent spectral stability under external bias. This result illustrates that π‐conjugated cationic polymers have a great potential to realize efficient blue mixed‐halide perovskite LEDs with stable electroluminescence.

Metal halide-based perovskites are regarded as promising candidates for light-emitting diodes (LEDs) owing to their high color purity, tunable bandgap and solution processability.

In prostate cancer cell line, LNCaP, emodin inhibites the proliferation by AR and p53-p21 pathways, and induces apoptosis via the mitochondrial pathway.

Perovskite‐based light‐emitting diodes (PeLEDs) have exhibited promising potential; however, their operational lifetimes are far from expectation. The large bias of the device during operation has been demonstrated as one of main reasons for accelerated device failure. To mitigate such a predicament, interfacial Auger effect (IAE) assisted sub‐bandgap voltage electroluminescence (EL) is a potential pathway to decrease the electric field intensity in each functional layer. However, the properties of a desirable IAE are still poorly understood. Herein, the underlying mechanism of IAE based on the injection characteristics of interfacial minority carriers at the Auger effect interface is investigated. Consequently, the prerequisites and the secondary conditions for the realization of IAE are proposed. Taking advantage of IAE assisted EL, the fabricated PeLEDs exhibit ultralow operational voltage, ignorable roll‐off, and improved operational stability. The findings in this work not only pave the way toward a feasible approach to enhance the stability of PeLEDs, but also highlight the potential of sub‐bandgap voltage EL in future display and lighting applications, especially in series circuits and tandem structures.

• First report to attempt to assess ECa aggressiveness with magnetic resonance spectroscopy (MRS). • MRS can differentiate type I from type II ECa. • MRS can differentiate ECa from BLs-ESm. • MRS cannot differentiate different stages of ECa or different grades of ECa. • Cho/water increased with the increase of tumour stage and size.

Perihematomal glucose metabolism abnormalities have a close relationship with the formation of vasogenic edema. Furthermore, abnormal glucose metabolism may impair capillary integrity and increase blood-brain barrier permeability.

The aim of this study was to investigate the efficacy of 11C-choline PET/CT imaging for lung cancer and the correlation between choline uptake of lung cancer tissue and the expression of choline kinase (ChoK), phosphorylcholine-cytidyl transferase and Ki-67 index. Between March 2008 and June 2010, 53 patients diagnosed or suspected of having lung cancer underwent integrated 11C-choline PET/CT and contrast-enhanced CT scans before surgery. After surgery, specimens from 42 patients diagnosed with lung cancer were used to detect the expression of ChoK, phosphorylcholine-cytidyl transferase and the Ki-67 index. The PET/CT results were analyzed using visual methods and the standardized uptake value (SUV) of lesions was measured using semi-quantitative methods. Finally, the analyzed results were compared to the histopathological results. The accuracy of the 11C-choline PET/CT for diagnosing lung cancer was 81.13% (43/53), compared with 71.70% (38/53) for CT scanning. The difference was not statistically significant (P=0.61). The accuracy of 11C-choline PET/CT for diagnosing lymph nodes was 83.76% (227/271), compared with 66.79% (181/271) for CT scanning. This difference was statistically significant (P=0.04); the SUVmean value of lesions correlated positively with the Ki-67 index (r=0.51, p=0.002). Of the 35 patients with positive 11C-choline PET results, 29 (82.86%) overexpressed ChoK, 26 (74.29%) overexpressed phosphorylcholine-cytidyl transferase. The seven patients with negative 11C-choline PET results did not exhibit overexpression of ChoK or phosphorylcholine-cytidyl transferase; the SUVmean value correlated positively with the expression of both ChoK and phosphorylcholine-cytidyl transferase (r=0.52, p=0.001; r=0.37, p=0.029). In conclusion, compared with contrast-enhanced CT, 11C-choline PET offers nodal staging with higher accuracy. The SUV value of PET is correlated with the proliferation of tumor cells and the mechanism of PET imaging is associated with the overexpression of ChoK and phosphorylcholine-cytidyl transferase.