The Investigation In The Lasing Behaviors Of Novel Copolymers And Perovskite Materials

1.This thesis investigates the optical gain properties of a novel green-yellow copolymer nF1/4F8 BT and its blend with PFO in detail.Compared with the values of PFO:F8BT blend,the amplified spontaneous emission(ASE)threshold values of PFO:nF1/4F8 BT blends can be reduced by 30%,and the net gain increased by 50% in copolymers with an F1/4:F8 ratio of 2:3.These results wereascribedto the changes in molecular packing induced by the branched F1/4 substitution which causesstrong interference withexciton transport and consequently partially hindering exciton annihilation.2.Furthermore,the thesis characterized the optical propertys of perovskite materials,and demonstrated the perovskite have excellent property on amplified spontaneous emission.The emission spectrum of perovskite materials could be tuned to green-yellow emission period by switching the halogen.The mophology of perovskite thin-film devices were investigatigated by scanning electron microscope(SEM).3.Simulation methods and programming approachs were also utilized in modeling the laser devices.The results suggested that optimizingthe distributed feed back laser architecture with introduce a waveguide element creatively could be an efficient method to reduce laser threshold.The development of the green-yellow copolymers,the investigation of the optical gain of perovskite materials and the simulationof the optical properties of laser device demonstrated anattractive approach for the design of more efficient semiconductor lasers.