NEAR-INFRARED SENSITIZERS FOT DYE-SENSITIZED SOLAR CELLS

本研究考察了四种染料作为染料敏化太阳能电池的敏化剂。第一章合成了一系列3-芳基-4-羟基环丁-3-烯-1,2-二酮，并对其作为氧化钛太阳能电池的增敏剂进行了研究。化合物对氧化钛具有较强的亲和力，3-芳基-4-羟基环丁-3-烯-1,2-二酮在氧化钛表面的荧光强度和自组装是提高光电转换效率（η）的重要因素。3-[4-（二十二氨基）苯基]-4-羟基环丁-3-烯-1,2-二酮的效率最高，为0.96%。在第二章。合成了一种新型近红外吸收型七甲基菁染料，并对其作为氧化锌太阳能电池的增敏剂进行了研究。2-（羧基苯基）硫代吲哚七甲基菁染料在804 nm处的入射光子电流效率（IPCE）为4.17%。第三章介绍了一系列具有2-羧乙基的新型苯乙烯染料，并将其作为一步阴极沉积模板法制备氧化锌太阳能电池的增敏剂。它们对氧化锌的最大吸收波长在500nm左右（λ <max>）。苯并噻唑环为吸电子基团，二甲基氨基为供电子基团。因此，3-（2 -羧基乙基）-2-[4-（二甲基氨基）苯乙烯基]苯并噻唑碘化剂表现出最佳的增敏性能。500nm附近的IPCE、最大短路光电流密度（I_<SC>）、开路光电压（V_<OC>）、填充因子（ff）和η分别为59.6%、6.33 mA cm^<-2> 0.51 V、57%和1.84%。第四章研究了一系列9-取代苝-3,4-酸酐在一步阴极沉积模板法制备的氧化锌太阳能电池中的增敏作用。溴衍生物的性能最好。IPCE在431。结果表明，I_<SC>, V_<OC>， ff和η分别为35.5%,1.78 mA cm^<-2>， 0.46 V 64%和0.52%。因此，苯乙烯染料作为增敏剂表现出良好的性能。通过改变苯乙烯染料的结构，可以实现色敏剂的分子设计。少

Four kinds of dyes were examined as sensitizers in dye-sensitized solar cells in this study. In chapter 1, a series of 3-aryl-4-hydroxycyclobut-3-ene-1,2-diones were synthesized and examined as sensitizers for a titanium oxide solar cell. The compounds showed strong affinity for titanium oxide and the fluorescence intensity and self-assembly of the 3-aryl-4-hydroxycyclobut-3-ene-1,2-diones on the titanium oxide surface were important factors in enhancing the solar-light-to-electricity conversion efficiency (η). The highest efficiency of 0.96% was observed for 3-[4-(didodecylamino)phenyl]-4-hydroxycyclobut-3-ene-1,2-dione. In chapter 2.novel near-infrared absorbing heptamethine cyanine dyes were synthesized and examined as sensitizers for a zinc oxide solar cell. A 2-(carboxyphenyl)thio-substituted indolium heptamethine cyanine dye showed the incident photon-to-current efficiency (IPCE) of 4.17% at 804 nm. In chapter 3, a series of novel styryl dyes having a 2-carboxyethyl group were ex … More amined as sensitizers for zinc oxid solar cell prepared by a one-step cathode deposition template method. Their absorption maxima (λ_<max>) on zinc oxide were observed around 500nm. As the electron-withdrawing heteroarom atic moiety, benzothiazolium ring was best and dimethylamino group as the electron-donating moiety. Consequently, 3-(2 -carboxyethyl)-2-[4-(diemthylamino)styryl]benzothiazolium iodide showed the best properties as a sensitizer. The IPCE around 500 nm, maximum short circuit photocurrent density (I_<SC>), open-circuit photovoltage (V_<OC>), fill factor (ff), and η were observed to be 59.6%, 6.33 mA cm^<-2> 0.51 V, 57%, and 1.84%, respectively. In chapter 4, a series of 9-substituted perylene-3,4-anhydrides were examined as sensitizers for a zinc oxide solar cell prepared by a one-step cathode deposition template method. The best performance was obtained for the bromo derivative. The IPCE at 431. nm, I_<SC>, V_<OC>, ff, and η were observed to be 35.5 %, 1.78 mA cm^<-2>, 0.46 V 64%, and 0.52%, respectively.Thus, styryl dyes showed good performance as the sensitizers. The molecular design of bathochromic sensitizers is possible by changing the structure of styryl dyes. Less