Issue 18, 2022

Recent development of pyridine based charge transporting materials for organic light-emitting diodes and perovskite solar cells

Abstract

In recent years, donor-acceptor based pyridine derivatives have significantly been used in organic solar cells (OSCs), thermally activated delayed fluorescence (TADF), organic light emitting diodes (OLEDs), perovskite solar cells (PSCs) and many more. Pyridine derivatives are used as charge carriers i.e. hole transporting materials (HTMs) in perovskite solar cells (PSCs) to improve the power conversion efficiency and stability of photovoltaic devices due to the enhanced open circuit voltage, film uniformity and improved hydrophobicity which further increase the long term durability. Pyridine derivatives are suitable electron transporting materials (ETMs) used in organic light emitting diodes (OLEDs) to improve the current efficiency, external quantum efficiency and thermal stability of the optoelectronic devices through high triplet energy to avoid the exciton quenching, low operating voltage, and smooth film formation ability. The frontier energy levels of pyridine based ETMs are controlled by aromatic π-conjugated moieties at the ortho, meta, and para positions of the pyridine unit, which provides deep highest occupied molecular orbital (HOMO) levels to block the holes/excitons and appropriate lowest unoccupied molecular orbital (LUMO) levels for smooth electron injection. We have explained the intermolecular and intramolecular interactions in the pyridine derivatives, which facilitate charge injection and enhance the electron transporting mobility of the ETMs used in organic light emitting diodes (OLEDs). In the review, we provide a better outlook of the recent developments in the design and synthesis of various donor-acceptor based pyridine derivatives as 4-tert-butylpyridine (tBP) additive free and dopant free hole-transporting materials (HTMs). The pyridine could form a Lewis acid-base adduct in the HTM and tris(pentafluorophenyl)borane (BCF) interacted with methylammonium lead iodide (MAPbI3), resulting in the MAPbI3/HTM interface becoming more selective for holes in the perovskite solar cells (PSCs).

Graphical abstract: Recent development of pyridine based charge transporting materials for organic light-emitting diodes and perovskite solar cells

Article information

Article type
Review Article
Submitted
26 Jan 2022
Accepted
18 Eph 2022
First published
20 Eph 2022

J. Mater. Chem. C, 2022,10, 6992-7017

Recent development of pyridine based charge transporting materials for organic light-emitting diodes and perovskite solar cells

M. Sheokand, Y. Rout and R. Misra, J. Mater. Chem. C, 2022, 10, 6992 DOI: 10.1039/D2TC00387B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements