Xiong Gong

TL;DR: In this article, the authors demonstrate efficient, bright red electrophosphorescent light emitting diodes (LEDs) employing tris (2,5-bis-2′-(9′,9′-dihexylfluorene) pyridine) iridium (III), [Ir(HFP)3], doped into a blend of poly(vinylcarbazole) (PVK) with 2-tert-butylphenyl-5-biphenyl-1,3,4-oxadiazol (

TL;DR: A series of novel conjugated copolymers based on naphtho[1,2-c:5,6-c]bis(2-octyl-[ 1,2,3]triazole) (TZNT) are synthesized and one demonstrates a high performance of up to 6.10% power conversion efficiency in a bulk-heterojunction (BHJ) solar-cell device.

TL;DR: In this paper, the authors designed and synthesized a new fully polymeric conductive hydrogel with an interpenetrating polymer network structure made of conductive PEDOT:PSS polymers and zwitterionic poly(HEAA-co-SBAA) polymers to achieve a combination of high mechanical, biocompatible, and sensing properties.

Abstract: In this work, alcohol-vapor solvent annealing treatment on CH3NH3PbI3 thin films is reported, aiming to improve the crystal growth and increase the grain size of the CH3NH3PbI3 crystal, thus boosting the performance of perovskite photovoltaics. By selectively controlling the CH3NH3I precursor, larger-grain size, higher crystallinity, and pinhole-free CH3NH3PbI3 thin films are realized, which result in enhanced charge carrier diffusion length, decreased charge carrier recombination, and suppressed dark currents. As a result, over 43% enhanced efficiency along with high reproducibility and eliminated photocurrent hysteresis behavior are observed from perovskite hybrid solar cells (pero-HSCs) where the CH3NH3PbI3 thin films are treated by methanol vapor as compared with that of pristine pero-HSCs where the CH3NH3PbI3 thin films are without any alcohol vapor treatment. In addition, the dramatically restrained dark currents and raised photocurrents give rise to over ten times enhanced detectivities for perovskite hybrid photodetectors, reaching over 1013 cm Hz1/2 W−1 (Jones) from 375 to 800 nm. These results demonstrate that the method provides a simple and facile way to boost the device performance of perovskite photovoltaics.

TL;DR: In this paper, the hole injection from poly(BTPD-Si-PFCB) into the "super yellow" derivative of poly(phenylene vinylene) and into several blue-emitting polymers is comparable to or better than that obtained with poly(ethylenedioxythiophene):poly(styrene sulfonic acid) (PEDOT:PSSA).