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Title: Controlling Molecular Doping in Organic Semiconductors

Journal Article · · Advanced Materials

The field of organic electronics thrives on the hope of enabling low-cost, solution-processed electronic devices with mechanical, optoelectronic, and chemical properties not available from inorganic semiconductors. A key to the success of these aspirations is the ability to controllably dope organic semiconductors with high spatial resolution. In this work, recent progress in molecular doping of organic semiconductors is summarized, with an emphasis on solution-processed p-type doped polymeric semiconductors. Highlighted topics include how solution-processing techniques can control the distribution, diffusion, and density of dopants within the organic semiconductor, and, in turn, affect the electronic properties of the material. Research in these areas has recently intensified, thanks to advances in chemical synthesis, improved understanding of charged states in organic materials, and a focus on relating fabrication techniques to morphology. Significant disorder in these systems, along with complex interactions between doping and film morphology, is often responsible for charge trapping and low doping efficiency. However, the strong coupling between doping, solubility, and morphology can be harnessed to control crystallinity, create doping gradients, and pattern polymers. These breakthroughs suggest a role for molecular doping not only in device function but also in fabrication—applications beyond those directly analogous to inorganic doping.

Research Organization:
Univ. of California, Davis, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Science Foundation (NSF)
Grant/Contract Number:
SC0010419; 1636385
OSTI ID:
1537362
Alternate ID(s):
OSTI ID: 1392143
Journal Information:
Advanced Materials, Vol. 29, Issue 42; ISSN 0935-9648
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 343 works
Citation information provided by
Web of Science

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Electron correlations in narrow energy bands journal November 1963
Packing Dependent Electronic Coupling in Single Poly(3-hexylthiophene) H- and J-Aggregate Nanofibers journal November 2012
Non-destructive patterning of conducting-polymer devices using subtractive photolithography journal December 2006
Conducting polymers in electronic chemical sensors journal January 2003
Highly power efficient organic light-emitting diodes with a p-doping layer journal December 2006
Ultralow Doping in Organic Semiconductors: Evidence of Trap Filling journal October 2012
Enhanced performance of inverted organic solar cell by a solution-based fluorinated acceptor doped P3HT:PCBM layer journal April 2013
Tuning the Properties of Polymer Bulk Heterojunction Solar Cells by Adjusting Fullerene Size to Control Intercalation journal December 2009
High Carrier Density and Metallic Conductivity in Poly(3-hexylthiophene) Achieved by Electrostatic Charge Injection journal May 2006
Morphology and Charge Transport in Conjugated Polymers journal January 2006
Doping of Organic Semiconductors: Impact of Dopant Strength and Electronic Coupling journal June 2013
Optical properties of charge transfer salts of tetracyanoquinodimethane (TCNQ) journal December 1993
Electrical Conductivity in Doped Polyacetylene. journal May 1978
Functionalized Acenes and Heteroacenes for Organic Electronics journal May 2007
Organic Electronics journal January 2013
Organic Electronics book August 2020
High operational and environmental stability of high-mobility conjugated polymer field-effect transistors through the use of molecular additives. text January 2017
Moderate doping leads to high performance of semiconductor/insulator polymer blend transistors text January 2013

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Optimization of the thermoelectric performance of layer-by-layer structured copper-phthalocyanine (CuPc) thin films doped with hexacyano-trimethylene-cyclopropane (CN6-CP) journal January 2019
Probing semiconductivity in crystals of stable semiquinone radicals: organic salts of 5,6-dichloro-2,3-dicyanosemiquinone (DDQ) radical anions journal January 2018
Clarification of the Molecular Doping Mechanism in Organic Single-Crystalline Semiconductors and their Application in Color-Tunable Light-Emitting Devices journal September 2018
Walking the Route to GHz Solution‐Processed Organic Electronics: A HEROIC Exploration journal December 2019
Backbone Structure Effect on the Thermoelectric Properties of IDT‐Based p‐Type Conjugated Polymers journal September 2019
Photoinduced Self-Assembled Nanostructures and Permanent Polaron Formation in Regioregular Poly(3-hexylthiophene) journal March 2018
Double doping of conjugated polymers with monomer molecular dopants journal January 2019
The Role of Weak Molecular Dopants in Enhancing the Performance of Solution-Processed Organic Field-Effect Transistors journal November 2018
Roles of interfaces in the ideality of organic field-effect transistors journal January 2020
Efficient molecular doping of polymeric semiconductors driven by anion exchange journal August 2019
Dopant/Semiconductor/Electret Trilayer Architecture for High-Performance Organic Field-Effect Transistors journal July 2018
A new method to enhance organic photodetectors active layer trap doping by blending doping journal January 2020
Excited State Dynamics of a Self‐Doped Conjugated Polyelectrolyte journal December 2019
Addition of the Lewis Acid Zn(C 6 F 5 ) 2 Enables Organic Transistors with a Maximum Hole Mobility in Excess of 20 cm 2 V −1 s −1 journal May 2019
Principles of Structural Design of Conjugated Polymers Showing Excellent Charge Transport toward Thermoelectrics and Bioelectronics Applications journal March 2019
Ground-state electron transfer in all-polymer donor–acceptor heterojunctions journal March 2020
Doping: A Key Enabler for Organic Transistors journal July 2019
Band Engineering and Majority Carrier Switching in Isostructural Donor–Acceptor Complexes DPTTA‐F X TCNQ Crystals ( X = 1, 2, 4) journal November 2019
Manipulating Doping of Organic Semiconductors by Reactive Oxygen for Field-Effect Transistors journal August 2018
Enhanced transport in transistor by tuning transition-metal oxide electronic states interfaced with diamond journal September 2018
Molecular doping enabled scalable blading of efficient hole-transport-layer-free perovskite solar cells text January 2018
Host dependence of the electron affinity of molecular dopants text January 2019
Recent Progress in High-Mobility Organic Transistors: A Reality Check journal July 2018
High Electron Affinity Enables Fast Hole Extraction for Efficient Flexible Inverted Perovskite Solar Cells journal March 2020
Structural effects on the charge transport properties of chemically and electrochemically doped dioxythiophene polymers journal January 2020
Ground-state charge-transfer interactions in donor:acceptor pairs of organic semiconductors – a spectroscopic study of two representative systems journal January 2019
Disorder compensation controls doping efficiency in organic semiconductors text January 2019
Small‐Molecule‐Based Organic Field‐Effect Transistor for Nonvolatile Memory and Artificial Synapse journal September 2019
Strong Enhancement of π‐Electron Donor/Acceptor Ability by Complementary DD/AA Hydrogen Bonding journal November 2019
Uniform doping of graphene close to the Dirac point by polymer-assisted assembly of molecular dopants journal September 2018
Tuning charge transport dynamics via clustering of doping in organic semiconductor thin films journal July 2019
Electrochemical doping engineering tuning of the thermoelectric performance of a π-conjugated free-standing poly(thiophene-furan) thin-film journal January 2020
The Impact of Dipolar Layers on the Electronic Properties of Organic/Inorganic Hybrid Interfaces journal May 2019
Unraveling the mechanism behind air instability in thin semiconducting polymer layers p-doped with molybdenum dithiolene complexes journal February 2020
Electronic and Optical Properties of Oligothiophene-F4TCNQ Charge-Transfer Complexes: The Role of the Donor Conjugation Length journal March 2019
Closing the Stability–Performance Gap in Organic Thermoelectrics by Adjusting the Partial to Integer Charge Transfer Ratio journal January 2020
Molecular Doping for Hole Transporting Materials in Hybrid Perovskite Solar Cells journal December 2019
A Reversible Structural Phase Transition by Electrochemical Ion Injection into a Conjugated Polymer preprint January 2019
The Martini Model in Materials Science preprint January 2020

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