Colloidal quantum dots (QDs) have the advantages of easy tunable wavelength， narrow emission， high efficiency， and so on. Corresponding electroluminescent (EL) QD light-emitting diodes (QLED) have the advantag• es of solution treatment， simple and low cost manufacturing process， which is beneficial to realize the wide color gam • ut， high contrast， large area and flexible display. However， there are still challenges in device performance and pat• terning technology for QLED-based display applications. With the progress of material and device engineering， the research of QLED display has made further progress. This paper first introduces the development of QDs and QLED in display application， then indicates the challenge and research progress of QLED in display application.

The γp → na + 2 (1320) → nρ 0 π + reactions within an effective Lagrangian approachWe investigate the a2(1320) meson photon production in the γp → na + 2 (1320) and γp → nρ 0 π + reactions within the effective Lagrangian method. For γp → na + 2 (1320) reaction, by considering the contributions only from the t−channel π + exchange, we get a fairly good description of the current experimental total cross section data. We also studied the γp → nρ 0 π + reaction, which mainly contribute to the γp → nπ + π + π − reaction. The latter reaction has measured by the CLAS Collaboration. The total cross sections, invariant mass distribution, and the Dalitz Plot of γp → nρ 0 π + reaction are shown, which can be tested by future experiments.