Host-guest Multiple Composite Materials:Preparation And Optoelectronic Applications

With the high-speed development of human society,the energy crisis has become one of the major problems today.Currently,fossil fuels are the main energy of production.In order to balance the long-term dependence on fossil fuels and look for a clean and sustainable way to solve the increasingly severe energy problems,a variety of energy transfer/storage systems have been designed and synthesized.The development of new materials and catalysts that can convert light energy into chemical energy has attracted high attention.During the process of development,the design of synthetic functional materials with high energy transfer efficiency is still an important challenge.Based on the multiple composite energy transfer system,we focus on the light harvesting efficiency(LHE),oxidation efficiency,separation efficiency and the photon-to-electron conversion efficiency(IPCE)of materials.Herein,starting from the efficient capture and conversion of light energy,we designed multivariate composite systems with proper energy transfer path.In other words,we designed the transfer path of the photoinduced electrons and holes based on the suitable energy level structure of materials.So we can effectively restrain the recombination of the photoinduced electrons and holes,and thus improve the photoelectrochemical reaction kinetics and the energy conversion efficiency.Combination of in situ growth,electro-deposition,solvent thermal growth and continuous water deposition techniques,we successfully synthesized two energy transfer systems,which are ruthenium compound/metal-organic framework/rutile titanium dioxide and quantum dots/layered double hydroxide/pucherite.We have proved their high energy harvesting efficiency and energy transfer efficiency through the experiment.Besides,we have explored the energy transfer path by theoretical calculations,which can provide a certain reference for the design and synthesis of other energy transfer system.At last,we proved that it is an important strategy to achieve efficient energy transfer by taking full advantage of the functional nanomaterials.