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Title: Chemical and Morphological Control of Interfacial Self-Doping for Efficient Organic Electronics

Abstract

Solution-based processing of materials for electrical doping of organic semiconductor interfaces is attractive for boosting the efficiency of organic electronic devices with multilayer structures. In order to simplify this process, self-doping perylene diimide (PDI)-based ionene polymers are synthesized, in which the semiconductor PDI components are embedded together with electrolyte dopants in the polymer backbone. Functionality contained within the PDI monomers suppresses their aggregation, affording self-doping interlayers with controllable thickness when processed from solution into organic photovoltaic devices (OPVs). Optimal results for interfacial self-doping lead to increased power conversion efficiencies (PCEs) of the fullerene-based OPVs, from 2.62% to 10.64%, and of the nonfullerene-based OPVs, from 3.34% to 10.59%. These PDI–ionene interlayers enable chemical and morphological control of interfacial doping and conductivity, demonstrating that the conductive channels are crucial for charge transport in doped organic semiconductor films. Using these novel interlayers with efficient doping and high conductivity, both fullerene- and nonfullerene-based OPVs are achieved with PCEs exceeding 9% over interlayer thicknesses ranging from ≈3 to 40 nm.

Authors:
 [1];  [2];  [3];  [2];  [4];  [2]; ORCiD logo [1]
  1. Univ. of Massachusetts, Amherst, MA (United States). Polymer Science and Engineering Dept.; Beijing Univ. of Chemical Technology (China). Beijing Advanced Innovation Center for Soft Matter
  2. Univ. of Massachusetts, Amherst, MA (United States). Polymer Science and Engineering Dept.
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); US Department of the Navy, Office of Naval Research (ONR); National Science Foundation (NSF)
OSTI Identifier:
1470752
Alternate Identifier(s):
OSTI ID: 1423702
Grant/Contract Number:  
N00014-17-1-2244; NSF‐CHE1506839; AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Materials
Additional Journal Information:
Journal Volume: 30; Journal Issue: 15; Journal ID: ISSN 0935-9648
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; conductivity; morphology characterizations; organic semiconductors; organic solar cells; self-doping

Citation Formats

Liu, Yao, Cole, Marcus D., Jiang, Yufeng, Kim, Paul Y., Nordlund, Dennis, Emrick, Todd, and Russell, Thomas P. Chemical and Morphological Control of Interfacial Self-Doping for Efficient Organic Electronics. United States: N. p., 2018. Web. doi:10.1002/adma.201705976.
Liu, Yao, Cole, Marcus D., Jiang, Yufeng, Kim, Paul Y., Nordlund, Dennis, Emrick, Todd, & Russell, Thomas P. Chemical and Morphological Control of Interfacial Self-Doping for Efficient Organic Electronics. United States. doi:10.1002/adma.201705976.
Liu, Yao, Cole, Marcus D., Jiang, Yufeng, Kim, Paul Y., Nordlund, Dennis, Emrick, Todd, and Russell, Thomas P. Mon . "Chemical and Morphological Control of Interfacial Self-Doping for Efficient Organic Electronics". United States. doi:10.1002/adma.201705976. https://www.osti.gov/servlets/purl/1470752.
@article{osti_1470752,
title = {Chemical and Morphological Control of Interfacial Self-Doping for Efficient Organic Electronics},
author = {Liu, Yao and Cole, Marcus D. and Jiang, Yufeng and Kim, Paul Y. and Nordlund, Dennis and Emrick, Todd and Russell, Thomas P.},
abstractNote = {Solution-based processing of materials for electrical doping of organic semiconductor interfaces is attractive for boosting the efficiency of organic electronic devices with multilayer structures. In order to simplify this process, self-doping perylene diimide (PDI)-based ionene polymers are synthesized, in which the semiconductor PDI components are embedded together with electrolyte dopants in the polymer backbone. Functionality contained within the PDI monomers suppresses their aggregation, affording self-doping interlayers with controllable thickness when processed from solution into organic photovoltaic devices (OPVs). Optimal results for interfacial self-doping lead to increased power conversion efficiencies (PCEs) of the fullerene-based OPVs, from 2.62% to 10.64%, and of the nonfullerene-based OPVs, from 3.34% to 10.59%. These PDI–ionene interlayers enable chemical and morphological control of interfacial doping and conductivity, demonstrating that the conductive channels are crucial for charge transport in doped organic semiconductor films. Using these novel interlayers with efficient doping and high conductivity, both fullerene- and nonfullerene-based OPVs are achieved with PCEs exceeding 9% over interlayer thicknesses ranging from ≈3 to 40 nm.},
doi = {10.1002/adma.201705976},
journal = {Advanced Materials},
number = 15,
volume = 30,
place = {United States},
year = {2018},
month = {3}
}

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Figures / Tables:

Figure 1 Figure 1: Chemical structures of the POI-based ionene interlayers and the photoactive layers used to prepare the OPV devices in this work (ITO: indium tin oxide; PED OT:PSS: poly(ethylenedioxythiophene) poly(styrene sulfonate )) .

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