Prof. Rajamalli: "Deep blue thermally activated delayed fluorescence emitter by optimizing donor position"

Young Investigator Seminar

The Institute of Organic Chemistry invites to the lecture of

P. Rajamalli  (research professor)
Materials Research Centre, Indian Institute of Science Bangalore, India

with the titel:

Deep blue thermally activated delayed fluorescence emitter by optimizing donor position

Abstract:

An efficient blue organic light-emitting diode (OLED) device with high color purity is challenging issue with technological relevance. Herein, we will demonstrate the role of donor substitution position in a thermally activated delayed fluorescence (TADF) emitter to achieve deep blue emission with improved color purity without reducing the device performance. The 3BPy-pDTC emitter exhibits narrow emission spectra with the FWHM of 58 nm. The OLED device using 3BPy-pDTC dopant provided a high EQE of 25% with deep blue emission maximum at 458 nm. 3BPy-pDTC shows color purity in deep blue emission as compared to its meta substituted counterpart 3BPy-mDTC.

References: 1. Bahadur Sk, E. Ravindran, U. Deori, N. Yadav, G. P. Nanda, P. Rajamalli J. Mater. Chem. C, 2022, 10, 4886. 2. G. P. Nanda, B. Sk, N. Yadav, S. Rajamanickam, U. Deori, R. Mahashaya, E. Zysman-Colman and P. Rajamalli, Chem. Commun. 2021, 57, 13728. 3. B. Sk, V. Thangaraji, N. Yadav, G. P. Nanda, S. Das, P. Gandeepan, E. Zysman-Colman and P. Rajamalli, J. Mater. Chem. C, 2021, 9, 15583. 4. P. Rajamalli, V. Thangaraji, N. Senthilkumar, C.-C. Ren-Wu, H.-W. Lin, and C.-H. Cheng, J. Mater. Chem. C, 2017, 5, 2919