Study On Preparation And Performance Of Multifunctional Responsive Organic Laser Devices

In organic thin-film lasers,if the spectra of two organic gain media is complementary,the hostguest system formed by the doping can achieve high-efficiency non-radiation F(?)rster energy transfer.Under optical pumping conditions,the amplified spontaneous emission(ASE)wavelength tunability of the film can be realized.Therefore,F(?)rster energy transfer can be used to tune the emission spectrum of the host-guest materials,thereby adjusting the output wavelength.The absorption spectrum of Merocyanine(MC)which is the isomer of Spiropyran(SP)overlaps with the emission spectrum of the typical yellow laser material F8 BT,and there are many ways to induce the conversion between SP and MC.On this basis,great efforts have been concentrated on the multi-functional integrated design of the lasers,the facile preparation process and the multi-mode induction between open and closed loop in order to tackle the problems of the single function of the traditional organic lasers and the complicated preparation method.In this thesis,a multifunctional wavelength-tunable organic laser device is designed and prepared based on the photothermal response,F(?)rster energy transfer principle and solution processing(spin coating and inkjet printing).The main results are summarized as follows:1? Based on the mature experience of thin-film lasers in our research group and tunable opticalresponse wavelength and amplified spontaneous emission from the F8 BT and SP blend system,the RGB triple emission has been accomplished in the laminated structure of the two-layer organic optical waveguide.In this case,the controllable output wavelength can be obtained with the variation of the pump energy and external light stimulus changes.This work can provide new inspiration for the manufacture of compact and multi-color switchable lasers.2 ? Using inkjet-printing technology,organic light-emitting materials F8 BT and SP are employed as printable inks to achieve patterning processing and be compatible with multiple supporting substrates.In this way,a laser anti-counterfeiting label with light response has been fabricated.This work has not only provided a simple production method for laser anti-counterfeiting labels with excellent anti-counterfeiting performance but also demonstrated new ideas for the design and innovation of inkjet printing multifunctional light-responsive organic lasers.3? By taking advantage of the thermochromic characteristics of SP and mixing it with F8 BT,the hybrid system can sense temperature changes and realize the ASE behavior with a controllable change in the emission wavelength.The hybrid system can cyclically switch the yellow-red dualcolor ASE output at different temperatures.This study can offer a new strategy for dual-wavelength switchable emission as well as exhibit a novel ideal of fabricating multifunctional temperatureresponse organic lasers.