Synthesis and Characterization of Donor-Acceptor β-Substituted BODIPY and their Application for Dye Sensitized Solar Cells

• Main Authors: Li-Jing Wang, 王儷靜
• Other Authors: Chin-Ti Chen
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/23318878996811113640

碩士 === 國立中央大學 === 化學研究所 === 100 === In this thesis, we synthesize the derivatives of BODIPY (4,4-difluoro-4-bora-3a,4a-diaza-s- indancene), and apply these derivatives in dye sensitized solar cells. Use the conjugated system of Donor-π-Acceptor (D-π-A) on the design, and BODIPY play the role of π-conjugation system, bounding with differdent donor substituent such as triphenylamine unit, (diphenylamino)thiophenyl unit, bis(4-methoxyphenyl)aminothiophenyl unit, and acceptor substituent is cyanoacrylic acid on the β-substituent of BODIPY. On the other hand, we synthesize the derivatives of 4,4-dihydroxyaryl-diaza-s-indacene and for the first time apply these dye in dye sensitized solar cells. These compounds are characterized by 1H NMR, 13C NMR, mass spectrometry, their absorption spectrum were estimated by UV-visible spectrometer, and their energy level of HOMO and LUMO in solution and adsorb on TiO2 were estimated by cyclic voltammetry and low-energy photoelectron spectrometer, respectively, use density functional theory and time-dependent density functional theory to imitate the orbital and energy levels of HOMO and LUMO, and apply in DSSCs. The highest power conversion efficiency in this thesis is PPB ( Jsc = 5.73mA / cm2, Voc = 590 mV, FF = 0.70, η = 2.36 % ). Through measure and TDDFT, displace the fluorine by 4-tert-butylcatechol and pyrocatechol will change the energy level of HOMO, and decrease the electron injection. Fabricating solar cell devices is the crucial factor of power conversion efficient. By different way of adsorb, solvent, concentration, time and electrolyte will optimization the efficient.