Light-Emitting Properties of Pyrimidine-5-Carbonitrile Derivatives: a Theoretical Calculation

Year 2022, Volume: 6 Issue: 1, 55 - 58, 28.06.2022

Necdet Karakoyun , Sultan Erkan

https://doi.org/10.46460/ijiea.935455

Abstract

In this study, 4,6-Di (9H-carbazol-9-yl) pyrimidine-5-carbonitrile (C1), 4,6-bis (3,6-di-tert-butyl-9H-carbazol-9-yl) pyrimidine-5-carbonitrile (C2), 4,6-bis (3,6-dimethoxy-9H-carbazol-9-yl) pyrimidine-5-carbonitrile (C3) compounds were optimized at the B3LYP/6-31G(d) level. Energy densities of frontier molecular orbitals were investigated with molecular properties. Vertical ionization potentials (IPv), adiabatic ionization potential (IPa) (in eV), vertical electron affinity (EAv), adiabatic electron affinity (EAa), the hole reorganization energy (h )and electron reorganization energy (e ) were calculated (in eV) for C1, C2 and C3 compounds. e values of the C1 and C3 compounds are 0.29 and 0.30 eV and the h value is 0.18 and 0.20 eV, respectively. It can be said that the C1 and C3 compounds are not suitable as an electron bearing layers (ETL) material since its e values are greater than 0.276 eV and that its h value is less than 0.290 eV, so they are a suitable material for the hole bearing layers (HTL). The C2 compound is suitable for both ETL and HTL materials.

Keywords

Electron bearing layers, Electron injection layer, DFT, hole bearing layers, Hole injection layer, OLED materials.

Pirimidin-5-Karbonitril Türevlerinin ve Farklı Şekilde İkame Edilmiş Karbazollerin Işık Yayan Özellikleri: Teorik Bir Hesaplama

Abstract

Bu çalışmada 4,6-Di (9H-karbazol-9-il) pirimidin-5-karbonitril (C1), 4,6-bis (3,6-di-tert-butil-9H-karbazol-9-il ) pirimidin-5-karbonitril (C2), 4,6-bis (3,6-dimetoksi-9H-karbazol-9-il) pirimidin-5-karbonitril (C3) bileşikleri B3LYP / 6-31G (d ) seviyesi. Sınır moleküler orbitallerin enerji yoğunlukları moleküler özellikleri incelenmiştir. Dikey iyonlaşma potansiyelleri (IPv), adyabatik iyonizasyon potansiyeli (IPa) (eV cinsinden), dikey elektron afinitesi (EAv), adyabatik elektron afinitesi (EAa), delik yeniden organizasyon enerjisi (h) ve elektron yeniden organizasyon enerjisi (e) hesaplandı (eV cinsinden) C1, C2 ve C3 bileşikleri için. C1 ve C3 bileşiklerinin e değerleri 0.29 ve 0.30 eV ve h değeri sırasıyla 0.18 ve 0.20 eV'dir. C1 ve C3 bileşiklerinin e değerleri 0,276 eV'den büyük ve h değeri 0,290 eV'den küçük olduğu için elektron taşıyan tabakalar (ETL) malzemesi olarak uygun olmadığı söylenebilir, bu nedenle delik yatak katmanları (HTL) için uygun bir malzemedir. C2 bileşiği hem ETL hem de HTL malzemeleri için uygundur.

Keywords

Elektron enjeksiyon tabakası, Elektron taşıyan tabakalar, delikli tabakalar, Delik enjeksiyon tabakası, DFT, OLED malzemeleri.

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