Ultrathini Films Of TTA-UC Assembled With LDHs,Luminescence Properties Of TTA-UC And Its Potential Application For LSC

Luminescent solar concentrator(LSC)was a kind of opto-functional devices to converse the solar light for realizing the photovoltaic effect in solar cell by luminescent species and the light-concentrating effect of planar waveguide.The key point of LSC is the high performance luminescent properties and good photo/thermostability.Given the good UV photostability and the intercalation of layered double hydroxides(LDHs),this project raised to construct the luminescent dyes co-assembly LDH-based composite thin films.The DPA @ PTBEM/LDHs composite ultra-thin films(UTFs)was prepared by novel assembly method of cationic micellar assembly with LDHs.The UTFs can be up-converted from near-infrared to visible light and has good photostability,realizing the organic fluorescent molecule/LDH composite film for the mechanization of LSC.1.The luminescence properties of DPA solution and RUB solution were studied,and the triplet-triplet annihilation up-conversion principle within the molecule was explored.Select long-wavelength low-intensity Xenon lamp excitation,both of which can appear its characteristic luminescence peak.For the DPA solution,an emission peak at 435 nm can be obtained with an excitation wavelength of 670 nm;for an RUB solution,an emission peak at 550 nm can be obtained with an excitation of 830 nm;the cause of this phenomenon was explored.The luminescence properties of DPA@PTBEM,RUB@PTBEM,DPA@PVK,and RUB@PVK solutions were compared.The stability of the solution of organic molecules containing PTBEM encapsulation was significantly enhanced.2.(DPA@PTBEM)/LDH,RUB@PTBEM)/LDH,DPA@PVK)/LDH,(RUB @PVK)/LDH composite ultrathin films were prepared by a co-assembly method.The organic molecule/LDH composite film with PTBEM encapsulation exhibited better light stability and achieved thinning of the organic molecule TTA-UC luminescence.3.The traditional TTA-UC,which is a bimolecular system of TTA-UC containing a sensitizer,was studied.Through the study of the TTET and TTA effects of the sensitizer PdOEP and the acceptor molecule DPA,an improved and optimized luminescence scheme was proposed.The luminescent properties of(PdoEP&DPA)@PTBEM solutions were studied by the effect of the block polymer PTBEM.4.By using the amphiphilicity of the block polymer PTBEM,the bimolecular TTA-UC system composed of organic molecules PdOEP and DPA was encapsulated,and the negatively charged anionic micelles were formed by adjusting the pH of the(PdoEP&DPA)@PTBEM solution.Through the method of layer assembly,the thin film of the TTA-UC bimolecular system is realized.5.Using prepared(PdoEP&DPA)@PTBEM/LDH film with up-conversion effect,using it as an up-conversion layer for silicon solar cells,to achieve the improvement of photoelectric conversion efficiency of silicon solar cells,reflecting(PdoEP&DPA)@PTBEM/LDH composite Thin film as a potential application for solar energy converter materials.