亞三維結(jié)構(gòu)有機(jī)光電材料的合成與性能研究
[Abstract]:In recent years, the organic molecular material with the sub-three-dimensional space structure has extensive research and application in the fields of organic light-emitting diodes, organic solar cells, organic white light illumination and the like. The sub-three-dimensional structure of two common chain is one of the representatives. The three-dimensional space structure of the single-bond connection does not need to introduce an excessive alkyl chain, so that the solubility of the material can be increased, such that the three-dimensional space structure has the isotropy of optical and electrical properties, And the carrier mobility of the semiconductor device can be improved. A series of narrow-band organic molecular materials with a sub-three-dimensional space structure are constructed by using the unique properties of the sub-three-dimensional space structure molecules, The application of such a sub-three-dimensional structure organic molecule as an electron donor material in an organic solar cell is explored. The thesis is divided into four parts: (1)5,5 '-1-2,1,3-benzo-2,1,3-benzene are used as the core, The electron donor-acceptor-donor-to-body organic small-molecule solar cell donor material (DTBTF and DCzTBTCz) with different electron-donating abilities was prepared by the Stille clinking reaction. The two benzene in the center of the molecule and the dihedral angle of the plane were found to be about 60 by molecular simulation. In this paper, the two compounds are used as electron donor materials, and the two compounds are mixed with PC71BM of the electron acceptor material, and a solution method is adopted to prepare the bulk heterojunction organic solar cell, which has certain photovoltaic performance, and the photovoltaic performance of the DFTBTF The photoelectric conversion efficiency (PCE) was 0.74%, the short-circuit current (Jsc) was 2.47 mA/ cm2, the open-circuit voltage (Voc) was 1.09 V, and the filling factor (FF) was 27. %. (2) Since the molecular weight of the electron donor material in the first chapter is small, the film-forming phase By extending the total length of the four arms to improve the molecular weight, the film-forming property of the four-arm is improved, and the absorption of the material on the sunlight is improved. The invention has the purposes of improving the performance of the photovoltaic device, and respectively preparing the SCTBT with the molar mass-weight of 4899g/ mol and the SCzTBT monodispersity macromolecular organic solar cell with the molar mass-weight of 5021g/ mol In the same time, one-dimensional linear molecules LFTBT and LCzTBT corresponding to them were prepared. The two-plane angles of the two benzene and the plane of the central core of SFTBT and SCzTBT have been exceeded by molecular simulation. By using one-dimensional linear molecule LFTBT as electron donor, PC71BM is used as electron acceptor, and PC71BM is used as electron acceptor, and its photoelectric conversion efficiency is PCE = 2.84%, Jsc = 2.95mA/ cm2, FF = 58.3%, and Voc = 0. The PCE = 3.38%, Voc = 1.08 V, Jsc = 6.75mA/ cm2, FF = 43%, and PCE of the three-dimensional three-dimensional structure compound SFTBT are higher than that of the one-dimensional linear molecule LFTBT by 19%. The photovoltaic performance of the SCzTBT of the sub-three-dimensional structure is higher than that of the linear molecule LCzTBT. Large increase. (3) We use the DHPT-SC In order to compare the samples, a 3,3 '-linked tetradecanoate is used as a central nuclear unit, and the cyanogen-isooctanoic acid ester is a tensile electronic unit and is placed at the tail end of the four arms to construct a receptor-donor-body-type narrow-band gap compound ST10-CN-1, ST10-CN, ST14-CN, and ST having a sub-three-dimensional space structure. 18-CN. It is found by molecular simulation that the two corners of the plane of the central nuclear unit have been more than 80 擄, indicating that these molecules have subthree. By increasing the number of the electron-donating groups to extend the length of the common chain, the thermodynamic, optical and electrochemical properties of the materials are studied. The effect of the properties of PC71BM is the electron donor material, PC71BM is the electron acceptor material, the solution method is used to prepare the bulk heterojunction organic solar cell, the photovoltaic performance is: PCE = 1.70%, Jsc = 5.35 mA/ cm2, Voc = 0.92 V, FF = 34.0%; (4)3,3 '-linked, with benzene and benzene The narrow-band band-gap compound SC6BT, SC8BT and SC14BT with different alkyl chain lengths were synthesized by means of molecular simulation. BT is close to 90. It is shown that these molecules have a sub-three-dimensional structure. The three molecules, respectively, are n-hexyl, isooctyl and n-tetradecyl as substituents, and the solubility and film-forming properties of the materials are improved by extending the length of the alkyl chain, and different alkyl-length substituents are also studied. the thermodynamic, optical, and electrical properties of the material (5) PdCl2dppf is used as a catalyst, and a biaryl compound 2T-CN, 4T-CN, 6T-CN, and the solvent, base and ligand in the reaction are screened, wherein the 6T-CN exhibits better photovoltaic performance: PCE = 2.03%, Voc = 0.86V, Jsc = 6.24 mA/ c
【學(xué)位授予單位】:華中科技大學(xué)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2014
【分類號(hào)】:O626;TM914.4
【共引文獻(xiàn)】
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