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Title: Are Transport Models Able To Predict Charge Carrier Mobilities in Organic Semiconductors?

Abstract

Organic photovoltaic devices have been steadily becoming more efficient through a combination of reduction in voltage losses, minimization of recombination pathways, and an increase in dimensionality of charge carrier pathways. However, a transport description that predicts the carrier mobility based on the mechanisms behind charge generation and transport in organic semiconducting material blends has been challenging. The complexity is mainly due to the absence of long-range order and the weak band coupling between molecules. In this Feature Article, we discuss charge transport models through a tight-binding lattice model approach. From the introduction of lattice disorder, we make a correlated liquid metal analogy and describe the effects of disorder on transport with quantum mechanical diffusion, Anderson localization, and percolation. We show that it is possible to understand the high- and low-temperature mobility data, the factors which limit the mobility, and the nature of the effective mass of charge carriers.

Authors:
 [1]; ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Northwestern Univ., Evanston, IL (United States)
Publication Date:
Research Org.:
Northwestern Univ., Evanston, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1579385
Alternate Identifier(s):
OSTI ID: 1578271
Grant/Contract Number:  
SC0001059
Resource Type:
Published Article
Journal Name:
Journal of Physical Chemistry. C
Additional Journal Information:
Journal Volume: 123; Journal Issue: 49; Journal ID: ISSN 1932-7447
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Movaghar, Bijan, Jones, Leighton O., Ratner, Mark A., Schatz, George C., and Kohlstedt, Kevin L. Are Transport Models Able To Predict Charge Carrier Mobilities in Organic Semiconductors?. United States: N. p., 2019. Web. doi:10.1021/acs.jpcc.9b06250.
Movaghar, Bijan, Jones, Leighton O., Ratner, Mark A., Schatz, George C., & Kohlstedt, Kevin L. Are Transport Models Able To Predict Charge Carrier Mobilities in Organic Semiconductors?. United States. doi:10.1021/acs.jpcc.9b06250.
Movaghar, Bijan, Jones, Leighton O., Ratner, Mark A., Schatz, George C., and Kohlstedt, Kevin L. Fri . "Are Transport Models Able To Predict Charge Carrier Mobilities in Organic Semiconductors?". United States. doi:10.1021/acs.jpcc.9b06250.
@article{osti_1579385,
title = {Are Transport Models Able To Predict Charge Carrier Mobilities in Organic Semiconductors?},
author = {Movaghar, Bijan and Jones, Leighton O. and Ratner, Mark A. and Schatz, George C. and Kohlstedt, Kevin L.},
abstractNote = {Organic photovoltaic devices have been steadily becoming more efficient through a combination of reduction in voltage losses, minimization of recombination pathways, and an increase in dimensionality of charge carrier pathways. However, a transport description that predicts the carrier mobility based on the mechanisms behind charge generation and transport in organic semiconducting material blends has been challenging. The complexity is mainly due to the absence of long-range order and the weak band coupling between molecules. In this Feature Article, we discuss charge transport models through a tight-binding lattice model approach. From the introduction of lattice disorder, we make a correlated liquid metal analogy and describe the effects of disorder on transport with quantum mechanical diffusion, Anderson localization, and percolation. We show that it is possible to understand the high- and low-temperature mobility data, the factors which limit the mobility, and the nature of the effective mass of charge carriers.},
doi = {10.1021/acs.jpcc.9b06250},
journal = {Journal of Physical Chemistry. C},
number = 49,
volume = 123,
place = {United States},
year = {2019},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1021/acs.jpcc.9b06250

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