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Improving hole injection is a critical issue for further boosting the brightness and efficiency of quantum dot light-emitting diodes (QLEDs) with an organic-inorganic hybrid structure. In this work, a small molecule of 4,4’-bis-(carbazole-9-yl)biphenyl (CBP) with a deep-lying HOMO level was doped into high mobility polymer of poly(9,9-dioctylfluorene-co-N-(4-(3-methyl- propyl)) diphenylamine) (TFB) to construct an efficient composite TFB:CBP hole transport layer (HTL). Green QLEDs based on such solution-processed composite HTLs exhibited a maximum luminance of 90159 cd/m2, with a peak current efficiency of 21.6 cd/A and power efficiency of 12.3 lm/W. These values were over one-order of magnitude larger than those obtained in the CBP-only devices and also much larger than those in the TFB-only devices.

Novel advance reservation (AR) requests, such as user data replication and grid computing, which are different from immediate reservation requests, allow certain initial-delay during setting up, as long as the resources are allocated before a preset deadline. Empowered by the optical orthogonal frequency-division multiplexing (O-OFDM) technology, the elastic optical networks (EON) support channels operating at heterogeneous line rates by allocating spectral resources in a flexible and dynamic manner. However, in a dynamic traffic scenario, dynamic path setup and teardown operation will inevitably lead to spectral fragmentation. In this paper, to effectively allocate the spectrum in a suitable duration along a better route, we introduce a notion of available time-spectrum consecutiveness (TSC) to describe the spectrum fragmentations along frequency axis and time axis. Based on TSC, three time-aware routing and spectrum assignment (RSA) algorithms are proposed. The novel algorithms retain the TSC as much as possible when establishing a lightpath and reduce the spectrum fragmentation. Simulation results indicate three proposed algorithms achieve lower blocking probability and higher spectrum efficiency.

We propose a novel global resources integrated resilience (GRIR) algorithm for a software defined data center interconnection architecture based on IP over elastic optical network (EON). The proposed algorithm provides resilience using the multiple stratums resources and enhances the data center service resilience responsiveness to the dynamic end-to-end recovery demands in case of the converged optical node failure. Our simulation results indicate that GRIR achieves significant improvements in terms of path blocking probability, resilience latency and resource occupation rate, compared with other resilience algorithms.