| Abstract [eng] |
Because of growing energy consumption and subsiding oil, coal and natural gas resources scientists are searching for cleaner and more effective alternatives to create electricity. The most promising scientific field is solar cells. But even though monocrystalline silicon solar cells are dominating in worlds solar cell market, expensive silicon purification technology limits the widespread use of it. Organic and hybrid solar cells have received considerable attention due to their simplicity of construction and low cost of production comparing with traditional solar elements based on silicon. The most popular are perovskite solar cells. In a few years of research they have reached up to 21.4 % efficiency. However the hole transporting material used in these kind of cells has very complicated and expensive synthesis process. The purpose of this research is to synthesize new organic hole transporting materials, which would have lower production cost and simpler synthesis process. This work contains synthesis of five different carbazole-based organic hole transporting materials C1, C3, C6, C9, C10. The chemical structure of the new synthesized compounds was confirmed by spectroscopy and elemental analysis. Also optical, thermal and photovoltaic properties of synthesized products were investigated. Differential scanning calorimetry showed that the compounds C1, C9 and C10 can exist in crystalline and amorphous states, while compounds with C3 and C6 – only in amorphous. Thermogravimetric analysis showed that all compounds have great thermal stability with 5 % mass loss at 413 – 432 °C. Best hole drift mobility (µ0 = 1,9 ∙ 10-4 cm2/V•s; µ = 1,7 ∙ 10-3 cm2/V•s) has been achieved in 1,9 – bis[3,6-bis(4,4‘-dimetoxydiphenylamine)-9H-carbazol-9-il]nonane (C9), therefore production line of the compound was proposed. |
