1564286-91-4Relevant academic research and scientific papers
Synthesis and characterization of push-pull bithiophene and thieno[3,2-b]thiophene derivatives bearing an ethyne linker as sensitizers for dye-sensitized solar cells
Fernandes, Sara S.M.,Raposo, M. Manuela M.,Mesquita,Andrade,Mendes,Justino, Licínia L.G.,Burrows, Hugh D.
, p. 194 - 205 (2017)
Five push-pull heterocyclic dyes 4–7, and 9 were synthesized and characterized in order to study the variations in the optical, electronic and photovoltaic properties induced by structural modifications, i.e. different spacer units and anchoring groups. The final push-pull conjugated dyes 6–7 and 9 are formed by a N,N-dimethylaniline donor moiety conjugated with bithiophene, ethynyl-bithiophene or ethynyl-thieno[3,2-b]thiophene spacers and cyanoacetic acid or rhodanine-3-acetic acid as anchoring group. The synthesis of the precursor aldehydes 4–5 was accomplished through a Sonogashira coupling, on the other hand, compound 8 was prepared by Suzuki coupling. Knoevenagel condensation of aldehydes 4, 5 and 8 with cyanoacetic acid or rhodamine-3-acetic acid afforded the final push-pull dyes 6, 7 and 9. Information on conformation, electronic structure and electron distribution was obtained by DFT and TDDFT calculations. This multidisciplinary study regarding the evaluation of the optical, redox and photovoltaic properties of the dyes reveals that compound 7, bearing an ethynyl-bithiophene spacer conjugated with a cyanoacetic acid anchoring group, has the highest conversion efficiency (3.51%) as dye sensitizer in nanocrystalline TiO2 solar cells. Co-adsorption studies were also performed for dyes 6–7 with N719 as co-adsorbent, and this enhanced dye efficiencies by 33–45%. The best cell performance was obtained by co-adsorbing N719 and dye 7 (75/25 vol%) with 4.66% efficiency.
Dye having adsorbent and solar cell including the same
-
Paragraph 0241; 0249, (2017/01/05)
The present invention relates to a dye comprising an adsorbent having a carboxylic acid group, and to a solar cell comprising the same. The dye according to the present invention is a non-metallic organic dye capable of inducing various substituents, having low band gaps, and having high efficiency by replacing a metallic dye used as a dye compound of a solar cell with low costs.(AA) Current density(BB) Voltage(CC) Example 3(DD) Example 4(EE) Example 5(FF) Example 6(GG) Example 1COPYRIGHT KIPO 2016
Novel compound and solar cell including the same
-
Paragraph 0218; 0219; 0227, (2016/10/10)
The present invention relates to a novel compound and a solar cell including the same. The novel compound of the present invention is a non-metal organic dye and accordingly introduces various groups, performs a low band gap and can substitute for a metal-based dye used as a dye compound of the solar cell at an affordable price, thereby realizing high efficiency.COPYRIGHT KIPO 2015
Facile synthesis of metal-free organic dyes featuring a thienylethynyl spacer for dye sensitized solar cells
Al-Eid, Manal,Lim, Sunghwan,Park, Kwang-Won,Fitzpatrick, Brian,Han, Chi-Hwan,Kwak, Kyungwon,Hong, Jongin,Cooke, Graeme
, p. 197 - 203 (2014/02/14)
In this article, we report the facile synthesis of metal-free dyes 6 and 7, their solution-based optical and redox properties and their use as sensitizers in dye-sensitized solar cells (DSSCs). Our studies indicate that the addition of the second thiophene unit in dye 7, decreases the oxidation and reduction potential and consequently the band gap of the molecule compared to 6. Furthermore, increasing the length of the conjugated spacer also affects on the properties of the DSSCs, with dye 7 providing a higher power conversion efficiency compared to 6 (η = 4.49 versus 3.23%).
