Quinoxaline-based small molecules: synthesis and investigation on their optoelectronic properties

Deng, J.; Tao, Q.; Yan, D.; Huang, X.; Liao, Y.

doi:10.1515/msp-2018-0021

Artykuł - szczegóły

Tytuł artykułu

Quinoxaline-based small molecules: synthesis and investigation on their optoelectronic properties

Autorzy

Deng J. , Tao Q. , Yan D. , Huang X. , Liao Y.

Wybrane pełne teksty z tego czasopisma

Identyfikatory

DOI

10.1515/msp-2018-0021

Warianty tytułu

Języki publikacji

Abstrakty

Small molecules of ThQuTh, CzQuTh, CzQuCz and TPAQuCz were designed and synthesized, based on quinoxaline acceptor, and electron donating groups, i.e. alkyl-thioephene, carbazole and triphenylamine on both side chains and molecular backbones. Their thermal, optical and electrochemical properties were systematically compared and studied. The absorption spectra of the small molecules were strongly affected by the donor units attached to quinoxaline. Strong electron donating groups, such as carbazole on the molecular backbone would lower optical band gap, resulting in a wide absorption and the strong donor on the side chain would enhance the absorption intensity in short wavelength region. The highest occupied molecular orbital (HOMO) energy levels of the four molecules were up-shifted with increasing the electron donating properties of donor units. The bulk-heterojunction organic solar cells with a device structure of ITO/PEDOT:PSS/SMs:PC₆₁BM/LiF/Al were fabricated, in which the small molecules functioned as donors while PC₆₁BM as acceptor. Because the electron-donating ability of carbazole (Cz), triphenylamine (TPA) is higher than that of thiophene (Th), CzQuTh, CzQuCz and TPAQuCz show higher power conversion efficiency (PCE) than that of ThQuTh. Furthermore, being the strongest in absorption intensity and widest in absorption spectrum, TPAQuCz has the highest power conversion efficiency. Further improvement of the device efficiency by optimizing the device structure is currently under investigation

Słowa kluczowe

quinoxaline acceptor materials optoelectronic properties solar cells

Wydawca

De Gruyter

Czasopismo

Materials Science Poland

Rocznik

2018

Tom

Vol. 36, No. 2

Strony

167--176

Opis fizyczny

Bibliogr. 37 poz., rys., tab.

Twórcy

autor

Deng J.

djyong@yeah.net

School of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan, Hunan, China

autor

Tao Q.

School of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan, Hunan, China

autor

Yan D.

School of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan, Hunan, China

autor

Huang X.

School of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan, Hunan, China

autor

Liao Y.

School of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan, Hunan, China

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).

Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-12d756d8-b5aa-484d-8140-6b2149b9695a