Tetraphenylsilane group containing carbazoles as high triplet energy host materials for solution-processable PhOLEDs

SALİHA ÖNER; İLKER ÖNER; HAYDAR AKDAĞ; CANAN VARLIKLI

Makale detayları

Tetraphenylsilane group containing carbazoles as high triplet energy host materials for solution-processable PhOLEDs

Yazarlar:

SALİHA ÖNER | İLKER ÖNER | HAYDAR AKDAĞ | CANAN VARLIKLI

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2015 Vol.39 Issue 5, pp.917-929

Belge Tipi:

Makale

Yayın Tarihi:

12/2015

Belge Dili:

Türkçe

Document ID (Org No.):

2000726757

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

Özet:

 

A series of solution processable, wide band-gap host materials composed of carbazole and tetraphenylsilane groups were designed and synthesized. Their thermal, electrochemical, and photophysical properties were fully investigated. The introduction of bulky tetraphenylsilane and \textit{tert}-butyl groups around the carbazole led to high glass transition temperatures (Tg)g)_{g}) between 120 and 204 ∘∘^{\circ}C. The triplet energies (ET)T)_{T}) of the synthesized materials were examined by low temperature (77 K) photoluminescence studies and determined as ET>T>_{T}> 2.6 for all compounds. Phosphorescent organic light-emitting devices with the ITO/PEDOT:PSS/EML/TPBi/Cs22_{2}CO33_{3}/Al device structure were fabricated by using synthesized materials as the host and two kinds of phosphorescent emitters, FIrpic and Ir(ppy)33_{3}, as the guests. The highest luminous and power efficiency values obtained by using FIrpic were 3.6 cd A−1−1^{-1} and 1.48 lm W−1−1^{-1}, respectively, with commission International de I'Eclairage (CIE) coordinates of (0.17, 0.36), whereas these values were 7.8 cd A−1−1^{-1} and 2.9 lm W−1−1^{-1} for the device structure when Ir(ppy)33_{3} was used as the guest [CIE (0.28, 0.62)].

 

A series of solution processable, wide band-gap host materials composed of carbazole and tetraphenylsilane groups were designed and synthesized. Their thermal, electrochemical, and photophysical properties were fully investigated. The introduction of bulky tetraphenylsilane and \textit{tert}-butyl groups around the carbazole led to high glass transition temperatures (Tg)g)_{g}) between 120 and 204 ∘∘^{\circ}C. The triplet energies (ET)T)_{T}) of the synthesized materials were examined by low temperature (77 K) photoluminescence studies and determined as ET>T>_{T}> 2.6 for all compounds. Phosphorescent organic light-emitting devices with the ITO/PEDOT:PSS/EML/TPBi/Cs22_{2}CO33_{3}/Al device structure were fabricated by using synthesized materials as the host and two kinds of phosphorescent emitters, FIrpic and Ir(ppy)33_{3}, as the guests. The highest luminous and power efficiency values obtained by using FIrpic were 3.6 cd A−1−1^{-1} and 1.48 lm W−1−1^{-1}, respectively, with commission International de I'Eclairage (CIE) coordinates of (0.17, 0.36), whereas these values were 7.8 cd A−1−1^{-1} and 2.9 lm W−1−1^{-1} for the device structure when Ir(ppy)33_{3} was used as the guest [CIE (0.28, 0.62)].

Makale detayları

Tetraphenylsilane group containing carbazoles as high triplet energy host materials for solution-processable PhOLEDs

Yazarlar: SALİHA ÖNER | İLKER ÖNER | HAYDAR AKDAĞ | CANAN VARLIKLI

Yayıncı: TUBITAK

Dergi: Turkish Journal of Chemistry 2015 Vol.39 Issue 5, pp.917-929

Belge Tipi: Makale

Yayın Tarihi: 12/2015

Belge Dili: Türkçe

Document ID (Org No.): 2000726757

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

SALİHA ÖNER | İLKER ÖNER | HAYDAR AKDAĞ | CANAN VARLIKLI

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2015 Vol.39 Issue 5, pp.917-929

Belge Tipi:

Makale

Yayın Tarihi:

12/2015

Belge Dili:

Türkçe

Document ID (Org No.):

2000726757

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527