scholarly journals Controlled Variable Oxidative Doping of Individual Organometallic Nanoparticles

2016 ◽  
Vol 22 (20) ◽  
pp. 6981-6986 ◽  
Author(s):  
Ann Feng ◽  
Wei Cheng ◽  
Jennifer Holter ◽  
Neil Young ◽  
Richard G. Compton
Keyword(s):  
Oxidative Doping

Preparation and oxidative doping of α,ω-dithienyl polyenes

1991 ◽  
pp. 799-802 ◽  
Author(s):  
Charles W. Spangler ◽  
Pei-Kang Liu ◽  
Alexa A. Dembek ◽  
Kathleen O. Havelka
Keyword(s):  
Oxidative Doping

Synthesis and Incorporation of Thienylene Vinylene Oligomers in Main-Chain Copolymers

1997 ◽  
Vol 488 ◽  
Author(s):  
L. G. Madrigal ◽  
E. H. Elandaloussi ◽  
C. W. Spangler
Keyword(s):  
Main Chain ◽  
Radical Cations ◽  
Synthetic Approach ◽  
Chemical Doping ◽  
Third Order ◽  
The Past ◽  
Growth Reaction ◽  
Oxidative Doping ◽  
Step Growth ◽  
Conductivity Behavior

AbstractPoly [2,5-thienylene vinylene] (PTV) has been studied extensively over the past decade for both its metallic conductivity behavior upon chemical doping, as well as its interesting third order nonlinear optical properties. PTV oligomers have been synthesized by our group 1, as well as others 2, and the formation of polaron-like radical-cations or bipolaron-like dications by oxidative doping has been demonstrated. In this paper we describe a general synthetic approach to PTV oligomers functionalized for copolymer formation by step-growth reaction.

Spectroelectrochemical study of the oxidative doping of polydialkylphenyleneethynylene using iterative target transformation factor analysis

The Analyst ◽  
2001 ◽  
Vol 126 (4) ◽  
pp. 508-512 ◽  
Author(s):  
U. Evans ◽  
O. Soyemi ◽  
M. S. Doescher ◽  
U. H. F. Bunz ◽  
L. Kloppenburg ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Transformation Factor ◽  
Oxidative Doping

Oxidative doping studies of PPV oligomers

1991 ◽  
Vol 44 (1) ◽  
pp. 85-93 ◽  
Author(s):  
Charles W. Spangler ◽  
Tom J. Hall
Keyword(s):  
Oxidative Doping

Synthesis of New Multifunctional Polymers inCorporating BIS-(Diphenylamino)Diphenylpolyene Moieties

1997 ◽  
Vol 488 ◽  
Author(s):  
C. W. Spangler ◽  
T. Faircloth ◽  
E. H. Elandaloussi ◽  
B. Reeves
Keyword(s):  
Photon Absorption ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
New Materials ◽  
Double Bonds ◽  
Model Compounds ◽  
Optical Limiters ◽  
Oxidative Doping ◽  
Multifunctional Polymers

AbstractA series of bis-(diphenylamino)diphenylpolyenes containing up to eight double bonds has been synthesized, both as parent model compounds, and functionalized for attachment as pendant chromophores. Oxidative doping of these new materials yields exceptionally stable bipolaronlike dications, even at the triene level. These new materials show promise as bimechanistic optical limiters by reverse saturable absorption and by 2-photon absorption.

scholarly journals Molecular Doping for Hole Transporting Materials in Hybrid Perovskite Solar Cells

2019 ◽  
Author(s):  
Vanira Trifiletti ◽  
Thibault Degousée ◽  
Norberto Manfredi ◽  
Oliver Fenwick ◽  
Silvia Colella ◽  
...  
Keyword(s):  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Research Field ◽  
Hole Transport ◽  
Material Structure ◽  
Stable Configuration ◽  
Oxidative Doping ◽  
Hole Transporting ◽  
Molecular Doping ◽  
Planar Heterojunction

Hybrid lead halide perovskites have been revolutionary in the photovoltaic research field, reaching efficiencies comparable with the most established photovoltaic technologies, although they do not yet reach their competitor stability. The search for a stable configuration required the engineering of the charge extraction layers; in this work, molecular doping is used as an efficient method for small molecule and polymer, employed as hole transport materials in planar heterojunction configuration on compact-TiO2. We proved the viability of this approach, obtaining significantly increased performances and reduced hysteresis on compact titania-based devices. We investigated the photovoltaic performance, correlating to the hole transport material structure. We have demonstrated that the molecular doping mechanism is more reliable than the oxidative doping, and verified that molecular doping in polymeric hole transport materials leads to highly efficient perovskite solar cell, with long-term stability.

Design of New Copolymers for Photonics Applications: Incorporation of Nlo-Active Chromophores with Well-Defined Conjugation Lengths

1995 ◽  
Vol 413 ◽  
Author(s):  
Charles W. Spangler ◽  
Mingqian He
Keyword(s):  
Nonlinear Optical ◽  
Near Infrared ◽  
Phenylene Vinylene ◽  
Third Order ◽  
Conductive Materials ◽  
Oxidative Doping ◽  
Doped Polymers ◽  
Degree Of Control ◽  
Neutral Polymer ◽  
Absorption Characteristics

ABSTRACTElectroactive polymers such as poly [p-phenylene vinylene] (PPV) and poly [2,5-thienylene vinylene] (PTV) have been shown to yield highly conductive materials upon oxidative doping,1 and to display enhanced third order nonlinear optical response.2 Optical absorption spectra for either neutral or doped polymers, however, are quite broad, extending well into the visible for the neutral polymer and into the near infrared (NIR) for the doped polymers, with little evident fine structure. For certain nonlinear optical (NLO) applications, this can lead to undesirable absorption losses and resonance phenomena. We would like to describe how copolymers incorporating oligomeric dithienylpolyene segments may be designed so as to give some degree of control over the polymer absorption characteristics in either neutral or oxidized form.

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