Title : Organic Light Emitting Diodes – From Molecules to Devices

Speaker : Prof. M. N. Satyanarayan

Date : 02/09/2026, Wednesday

Time : 04:00 PM

Venue : Physics Seminar Hall

Abstract : Organic light-emitting diodes (OLEDs) have emerged as an important technology for next-generation displays and lighting because of their thin, lightweight, flexible and potentially large-area form factors. Their performance, however, depends critically on the molecular properties of the organic semiconductor, charge injection and transport, exciton dynamics, and the efficiency with which excited states are converted into light. In this talk, I will present an overview of the OLED research activities in our laboratory, focusing on the development and understanding of organic semiconductor materials for light-emitting applications. I will begin by explaining why one should look to OLEDs while conventional semiconductor technology for LEDs is mature and commercialized. I will discuss our approach to OLED device design, thermal and morphological characterization, optical properties, charge-carrier transport and impedance spectroscopy. Particular emphasis will be placed on balanced electron and hole transport, and the development of multifunctional host materials for efficient deep-blue emission. The talk will also highlight the OLEDs made in our laboratory in the past, current research and will conclude with the future directions of our OLED research.

All Are Welcome.

Title : Understanding Our Dynamic Sun: The Solar Atmosphere, Coronal Heating and Solar Activity

Speaker : Ms. Miftah Faridl

Date : 09/09/2026, Wednesday

Time : 04:00 PM

Venue : Physics Seminar Hall

Abstract : The Sun is a highly dynamic star with a complex atmosphere extending from the cool photosphere to the million-degree corona, shaped continuously by magnetic fields. This presentation introduces the fundamental structure of the solar atmosphere and the evolution of solar magnetic fields. Special emphasis is placed on the coronal heating problem where coronal temperatures unexpectedly rise to several million kelvins. Primary proposed heating mechanisms are examined, including wave heating and magnetic reconnection, with a focus on coronal loops as key observational structures for energy transport and dissipation.