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Pochodne 9,9'-bifluorenylidenu dla zastosowań w ogniwach perowskitowych

Pająk Agnieszka Katarzyna, Lipiński Marek, Schab-Balcerzak Ewa

Przegląd Elektrotechniczny

2022

R. 98, nr 2

95--97

W pracy przedstawiono dwie pochodne 9,9’-bifluorenylidenu, różniące się długością łańcucha alkoksylowego, które zastosowano jako związki transportujące ładunki dodatnie (HTM) w perowskitowych ogniwach fotowoltaicznych o budowie FTO/b-TiO2/m-TiO2/perowskit/HTM/Au. Dodatkowo przygotowano ogniwa referencyjne bez HTM i zawierające jako HTM spiro-MeOTAD (C81H68N4O8). Najwyższą sprawność (7,33%), wyższą niż ogniwa referencyjnego (4,40%), uzyskano dla związku z grupami etoksylowymi.

The article presents two 9,9’-bifluorenylidene derivatives differing in the length of the alkoxy chain, which were applied as hole transporting materials (HTM) in perovskite solar cells with structure FTO/b-TiO2/m-TiO2/perovskite/HTM/Au. Additionally, the reference cells without HTM and based on spiro-MeOTAD (C81H68N4O8) as HTM were also prepared. The highest efficiency (7.33%), being higher compare to the reference cell (4.40%), was reached for compound with ethoxyl groups.

A solution-processable small-organic molecules containing carbazole or phenoxazine structure as hole-transport materials for perovskite solar cells

Gawlińska-Nęcek Katarzyna, Starowicz Zbigniew, Tavgeniene Daiva, Krucaite Gintare, Grigalevicius Saulius, Schab-Balcerzak Ewa, Lipiński Marek

Opto-Electronics Review

2019

Vol. 27, No. 2

137--142

Three low molecular weight compounds bearing carbazole units (1,6-di{3-[2-(4-methylphenyl)vinyl]carbazol-9-yl}hexane and 9,9'-di{6-[3-(2-(4-methylphenyl)vinyl)-9-carbazol-9-yl]hexyl}-[3,3']bicarbazole) and phenoxazine structure (10-butyl-3,7-diphenylphenoxazine) were tested as hole-transporting materials in perovskite solar cells. Two of them were successfully applied as hole transporting layers in electroluminescent light emitted diodes. The examined compounds were high-thermally stable with decomposition temperature found at the range of 280–419 °C. Additionally, DSC measurement revealed that they can be converted into amorphous materials. The compounds possess adequate ionization potentials, to perovskite energy levels, being in the range of 5.15–5.36 eV. The significant increase in power conversion efficiency from 1.60% in the case of a device without hole-transporting layer, to 5.31% for device with 1,6-di{3-[2-(4-methylphenyl)vinyl]carbazol-9- yl}hexane was observed.