Material Modification,interfacial Modification And Solution Sensing Based On ASE Characteristics Of Organic Laser Gain Medium

Organic laser devices because of its adjustable coherent source range,compact device structure,easy to produce,low price and other advantages gradually by the attention of scientific research workers in recent years.Although after the unremitting efforts of scientific research personnel,the relevant research has made great progress that the optically pumped solid organic laser has been successful achieved in 1996,unfortunately,the realization of electrically pumped organic semiconductor lasers has been an urgent problem in the field of organic lasers.This paper starting from the basic principles of laser,expounds the history and development of organic semiconductor laser,and the organic semiconductor laser materials,device structure and application direction are summarized and summarized,The present situation and development bottleneck of organic semiconductor laser are discussed,at the same time fully organic semiconductor laser application prospect are introduced.In this paper,some meaningful explorations are made from three aspects: the modification of organic laser materials,the modification of interface and the application of sensors.This work can provide reference for further study.(1)A novel approach to control ?-phase content generated in poly(9,9-dioctylfluorene)(PFO)films.Very small amount of paraffin oil was used as the additive to the PFO solution in toluene.The ?-phase fraction in the spin-coated PFO films can be modified from 0% to 20% simply by changing the volume percentage of paraffin oil in the mixed solution.OLEDs and amplified spontaneous emission(ASE)study confirmed low ?-phase fraction can promise better OLEDs device while high ?-phase fraction benefit the ASE performance.(2)We reported a facial method for reducing optical waveguide losses induced by the direct contact of ITO electrode and gain media based on a novel conjugated polyelectrolyte(CPE)material poly[9,9-dioctyl-fluorene-co-(bis-N,N'-(3-carboxyphenyl)-bis-N,N'-phenylbenzidine)](BFA).The results show that the device with BFA interface modified by conjugated polyelectrolyte has excellent ASE performance.By optimizing the structure of each layer,the device can adjust the output of ASE with low threshold,which improves the performance of ASE and widens the application.(3)Based on the ASE characteristics of organic laser gain medium,a high sensitive solution detection sensor is designed.The slight difference of the refractive index of the device will cause the obvious shift of the gain media ASE peak position,by detecting the change of ASE peak position,the concentration and type of solution can be easily resolved.The sensor has the advantages of high sensitivity,simple fabrication process and high integration,which will provide a simple,low-cost,high sensitivity solution for the medical inspection,environmental monitoring and other fields.