TY - JOUR

T1 - Host-guest molecular doping guide for emissive organic semiconductor crystals

AU - Kuimov, Anatoly D.

AU - Becker, Christina S.

AU - Sonina, Alina A.

AU - Kazantsev, Maxim S.

N1 - Funding Information: This work was supported by RSF project 20-73-10090. Powder X-ray diffraction measurements were carried out at the Research and Education Centre of the Novosibirsk State University REC-008. The assistance of Dr Evgeny Losev is gratefully acknowledged. Authors acknowledge Multi-Access Chemical Service Center SB RAS for spectral and analytical measurements. Publisher Copyright: © 2022 The Royal Society of Chemistry.

PY - 2022/10/11

Y1 - 2022/10/11

N2 - Molecular doping is an extremely useful approach for the optoelectronic properties tuning of organic materials, particularly crystalline luminescent semiconductors. Usually, dopant materials with good luminescence properties are used to improve the optoelectronic properties of host materials. However, the host-dopant compatibility and their selection criteria remain unclear. It is generally considered that the host and dopant should have a “similar” structure, which does not allow one to perform a thorough systematic design and choice of materials for obtaining low-defect doped organic semiconductors. Herein, we report a systematic experimental study coupled with existing literature data on host-dopant compatibility in a series of symmetric linear conjugated small molecules. Molecular planarity, short molecular axis and side polar substituents were demonstrated to be critical for successful host-guest molecular doping. Heterocyclic unit type and arrangement, molecular long axis, conjugation chain length and terminal substituents were demonstrated to not affect the host-dopant compatibility. An elaborated molecular doping guide is highly demanded for the systematic smart design of novel doped high-performance luminescent organic semiconductor materials.

AB - Molecular doping is an extremely useful approach for the optoelectronic properties tuning of organic materials, particularly crystalline luminescent semiconductors. Usually, dopant materials with good luminescence properties are used to improve the optoelectronic properties of host materials. However, the host-dopant compatibility and their selection criteria remain unclear. It is generally considered that the host and dopant should have a “similar” structure, which does not allow one to perform a thorough systematic design and choice of materials for obtaining low-defect doped organic semiconductors. Herein, we report a systematic experimental study coupled with existing literature data on host-dopant compatibility in a series of symmetric linear conjugated small molecules. Molecular planarity, short molecular axis and side polar substituents were demonstrated to be critical for successful host-guest molecular doping. Heterocyclic unit type and arrangement, molecular long axis, conjugation chain length and terminal substituents were demonstrated to not affect the host-dopant compatibility. An elaborated molecular doping guide is highly demanded for the systematic smart design of novel doped high-performance luminescent organic semiconductor materials.

UR - http://www.scopus.com/inward/record.url?scp=85141506595&partnerID=8YFLogxK

U2 - 10.1039/d2nj03916h

DO - 10.1039/d2nj03916h

M3 - Article

AN - SCOPUS:85141506595

VL - 26

JO - New Journal of Chemistry

JF - New Journal of Chemistry

SN - 1144-0546

ER -