Preparation and characterization of a new class of emissive Os(II) complexes ( 1 -5 ) have been achieved using 3-(thiazol-2-yl), 3-(benzothiazol-2-yl), 3-(imidazol-2-yl) and 3-(benzimidazol-2-yl) azole chelates, together with the incorporation of one diphosphine ancillary for satisfying the octahedral coordination arrangement. The resulting Os(II) complexes, except for 5 , all show bright emission spanning visible region from green to saturated red, and their structural versus spectroscopic properties have been comprehended by absorption/emission together with computational approaches. Subsequently, a series of solution-processed OLEDs using 1 -4 as the dopant were successfully fabricated, demonstrating excellent device performances with external quantum effi ciency (EQE) of 15%, current effi ciency exceeding 48 cd/A, and power conversion effi ciency up to 50 lm/W. Complex 4 is the only Os(II) based phosphor so far suitable for the fabrication of highly effi cient green-emitting OLEDs.

Our study suggests that surgery should be undertaken for PSHP as soon as possible after the clinical condition has stabilized. Under this strategy, VATS is an acceptable approach. It allows a shorter hospital stay and is exempt from unnecessary blood transfusion. Later complications, such as empyema and impaired lung reexpansion, can also be avoided.

No abstract

No abstract