Unknown

Dataset Information

0

Electrical Conductivity of Doped Organic Semiconductors Limited by Carrier-Carrier Interactions.


ABSTRACT: High electrical conductivity is a prerequisite for improving the performance of organic semiconductors for various applications and can be achieved through molecular doping. However, often the conductivity is enhanced only up to a certain optimum doping concentration, beyond which it decreases significantly. We combine analytical work and Monte Carlo simulations to demonstrate that carrier-carrier interactions can cause this conductivity decrease and reduce the maximum conductivity by orders of magnitude, possibly in a broad range of materials. Using Monte Carlo simulations, we disentangle the effect of carrier-carrier interactions from carrier-dopant interactions. Coulomb potentials of ionized dopants are shown to decrease the conductivity, but barely influence the trend of conductivity versus doping concentration. We illustrate these findings using a doped fullerene derivative for which we can correctly estimate the carrier density at which the conductivity maximizes. We use grazing-incidence wide-angle X-ray scattering to show that the decrease of the conductivity cannot be explained by changes to the microstructure. We propose the reduction of carrier-carrier interactions as a strategy to unlock higher-conductivity organic semiconductors.

SUBMITTER: Koopmans M 

PROVIDER: S-EPMC7747224 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature

altmetric image

Publications

Electrical Conductivity of Doped Organic Semiconductors Limited by Carrier-Carrier Interactions.

Koopmans Marten M   Leiviskä Miina A T MAT   Liu Jian J   Dong Jingjin J   Qiu Li L   Hummelen Jan C JC   Portale Giuseppe G   Heiber Michael C MC   Koster L Jan Anton LJA  

ACS applied materials & interfaces 20201202 50


High electrical conductivity is a prerequisite for improving the performance of organic semiconductors for various applications and can be achieved through molecular doping. However, often the conductivity is enhanced only up to a certain optimum doping concentration, beyond which it decreases significantly. We combine analytical work and Monte Carlo simulations to demonstrate that carrier-carrier interactions can cause this conductivity decrease and reduce the maximum conductivity by orders of  ...[more]

Similar Datasets

| S-EPMC5025745 | biostudies-literature
| S-EPMC4652272 | biostudies-literature
| S-EPMC4812289 | biostudies-literature
| S-EPMC5862893 | biostudies-other
| S-EPMC4908600 | biostudies-literature
| S-EPMC3644075 | biostudies-literature
| S-EPMC3216570 | biostudies-literature
| S-EPMC6661030 | biostudies-literature
| S-EPMC9229988 | biostudies-literature
| S-EPMC9060595 | biostudies-literature