Please use this identifier to cite or link to this item: https://idr.l2.nitk.ac.in/jspui/handle/123456789/16013
Title: Butterfly-Shaped Thiophene-Pyridine Hybrids: Green Electroluminescence and Large Third-Order Optical Nonlinearities
Authors: Kakekochi V.
Gangadharappa S.C.
Nikhil P.P.
Chandrasekharan K.
Darshan V.
Narayanan Unni K.N.
Dalimba U.K.
Issue Date: 2020
Citation: ChemPlusChem , Vol. 85 , 8 , p. 1762 - 1777
Abstract: A set of four symmetric, butterfly-shaped 4-(4-(decyloxy)phenyl)-2,6-di(thiophen-2-yl)pyridine (TPY) derivatives 2TPA-TPY (TPY center and triphenylamine end groups), 2CBZ-TPY (TPY center and N-ethyl carbazole end groups), 2TPY-TPA (triphenylamine center and TPY at the periphery) and 2TPY-CBZ (N-ethyl carbazole center and TPY at the periphery) was synthesized. The molecules show reverse saturable absorption (RSA) which is consistent with two-photon absorption (2PA) associated with excited-state absorption (ESA) when excited using a 532 nm laser beam. The molecules 2TPA-TPY and 2TPY-TPA possess extremely low limiting thresholds of 1.73 and 2.68 J cm−2, respectively. An organic light-emitting diode (OLED) fabricated from 2TPA-TPY exhibits green emission with a maximum luminance of 207 cd m−2, a current efficiency (ηCE) of 1.51cd A−1, a maximum power efficiency (ηPmax) of 0.46 lm W−1 and an external quantum efficiency (ηEQE) of 0.48 % at 100 cd m−2. © 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
URI: https://doi.org/10.1002/cplu.202000435
http://idr.nitk.ac.in/jspui/handle/123456789/16013
Appears in Collections:1. Journal Articles

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