High Performance Organic Semiconductors for Photonics and Electronics

Abstract: Organic semiconductors are the focus of intense academic and industrial research because they are important functional materials for low-cost printable electronic devices, particularly for transistors, displays, sensors, and light-harvesting devices. The active organic semiconducting materials are emerging due to their ink formulation capability, tunable light absorption/emission, interesting charge transport properties, and relatively adequate HOMO-LUMO energies. Photophysical, electrochemical, morphological, and electrical properties of these semiconductors are primarily controlled via molecular engineering by selecting suitable conjugated blocks which can be either electron-donating (donors) or electron-accepting (acceptors). Conjugated π-functional semi-conductors constructed using fused aromatic building blocks is a suitable choice for high performance organic electronics devices. In my talk, I will explain the various classes of donor-acceptor-based semiconductors developed in my research group. In this presentation, the design, synthesis, optoelectronic properties, solid-state interactions, and device performance of novel donor-acceptor based high performance organic semiconductors will be discussed. Some low band gap materials could achieve high hole carrier mobility close to 1 to 4.2 cm2/V.s in p-channel transistors with low operating voltage (about 10 V) and small channel length (4 microns). Additionally, our rationally designed materials also exhibited the highest gain in inverter type logic circuits, multi-bit storage in memory devices, and selectivity of analytes using chemical sensors. Our recent attempts on hole-transporting materials for high-performance perovskite solar cells achieving more than 20% efficiency will be also discussed.
Citation of this article:
Vid. Proc. Adv. Mater., Volume 2, Article ID 2021-02110 (2021)
DOI: 10.5185/vpoam.2021.02110
Full article: www.proceedings.iaamonline.or...
0:00 Introduction
1:19 Photonic and Electronic Devices: Display, Circuits to Energy Harves
6:46 Carbon Chemistry is Rich - Enormous Synthesis Possibilities of Making Exotic Semiconductors for Optoelectronics
6:55 Donor Acceptor System: Most Successful Approach for High Performance in
7:46 Organic Field Effect Transis
11:34 POPP-TBT Donor Acceptor Polymer
14:29 Ambipolar Polymer
15:35 PDPP-FBF: Donor Acceptor Polymer
20:09 Low Operating Voltage yet High Mobility OFETS
21:20 DPP Based Polymers- World Class Performance Motivation for High Holem
26:07 Growing Crystals for Single Crystal Transistors
26:16 Naphthalene Flanked Diketopyrrolopyrrole (OPPN)
27:37 Principle of Operation of Perovskite Solar Cell PSC
27:53 Role of Hole Transporting Layer
28:21 Energy Levels - Experimental measurement
30:25 ADVANCED ENERGY MATERIALS

[@souravmondal9533]

Wonderful lecture , thanks to Prof. Prashant Sonar for illuminating the concept. Best Wishes!

[@sindhboardacademy6292]

Very good