scholarly journals Benzobisthiadiazole-based high-spin donor–acceptor conjugated polymers with localized spin distribution

2021 ◽  
Author(s):  
Md Abdus Sabuj ◽  
Md Masrul Huda ◽  
Chandra Shekar Sarap ◽  
Neeraj Rai
Keyword(s):  
Conjugated Polymers ◽  
Magnetic Materials ◽  
High Spin ◽  
Ground State ◽  
Spin Distribution ◽  
Organic Magnetic Materials ◽  
Donor Acceptor

This work indicates that carefully selected acceptor units can lead to a localized spin topology and a high-spin (S = 1) ground-state with a pure diradical (y0 = 1) character suitable for organic magnetic materials.

Organic Polyradical Models for Organic Magnetic Materials

1989 ◽  
Vol 173 ◽  
Author(s):  
David A. Modarelli ◽  
Frank C. Rossitto ◽  
Masaki Minato ◽  
Paul M Lahti
Keyword(s):  
Magnetic Materials ◽  
High Spin ◽  
Experimental Methodology ◽  
Thermal Methods ◽  
Organic Magnetic Materials ◽  
Solid Phases

ABSTRACTA variety of model organic high spin molecules based upon coupled phenoxy and phenylnitrene systems has been examined by semiempirical MO-CI theory. Experimental methodology using photochemical and thermal methods in solution and solid phases to generate and study phenoxy groups for investigation of these models is presented.

scholarly journals Topology and ground state control in open-shell donor-acceptor conjugated polymers

2021 ◽  
pp. 100467
Author(s):  
Kevin S. Mayer ◽  
Daniel J. Adams ◽  
Naresh Eedugurala ◽  
Molly M. Lockart ◽  
Paramasivam Mahalingavelar ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Ground State ◽  
Open Shell ◽  
State Control ◽  
Donor Acceptor

scholarly journals Influence of Backbone Curvature on the Organic Electrochemical Transistor Performance of Glycolated Donor‐Acceptor Conjugated Polymers

2021 ◽  
Author(s):  
Bowen Ding ◽  
Gunwoo Kim ◽  
Youngseok Kim ◽  
Flurin D. Eisner ◽  
Edgar Gutiérrez-Fernández ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Electrochemical Transistor ◽  
Donor Acceptor

scholarly journals Backbone Effects on the Thermoelectric Properties of Ultra-Small Bandgap Conjugated Polymers

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2486
Author(s):  
Dexun Xie ◽  
Jing Xiao ◽  
Quanwei Li ◽  
Tongchao Liu ◽  
Jinjia Xu ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Power Factor ◽  
Carrier Mobility ◽  
Polymeric Materials ◽  
Thermoelectric Performance ◽  
Organic Thermoelectric Materials ◽  
Higher Power ◽  
Donor Acceptor ◽  
Maximum Power Factor ◽  
Higher Carrier Mobility

Conjugated polymers with narrower bandgaps usually induce higher carrier mobility, which is vital for the improved thermoelectric performance of polymeric materials. Herein, two indacenodithiophene (IDT) based donor–acceptor (D-A) conjugated polymers (PIDT-BBT and PIDTT-BBT) were designed and synthesized, both of which exhibited low-bandgaps. PIDTT-BBT showed a more planar backbone and carrier mobility that was two orders of magnitude higher (2.74 × 10−2 cm2V−1s−1) than that of PIDT-BBT (4.52 × 10−4 cm2V−1s−1). Both exhibited excellent thermoelectric performance after doping with 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane, where PIDTT-BBT exhibited a larger conductivity (0.181 S cm−1) and a higher power factor (1.861 μW m−1 K−2) due to its higher carrier mobility. The maximum power factor of PIDTT-BBT reached 4.04 μW m−1 K−2 at 382 K. It is believed that conjugated polymers with a low bandgap are promising in the field of organic thermoelectric materials.

scholarly journals Efficient Inverted Solar Cells Using Benzotriazole-Based Small Molecule and Polymers

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 393
Author(s):  
Ja Eun Lee ◽  
Yoon Kim ◽  
Yang Ho Na ◽  
Nam Seob Baek ◽  
Jae Woong Jung ◽  
...  
Keyword(s):  
Solar Cell ◽  
Conjugated Polymers ◽  
Power Conversion ◽  
High Energy ◽  
Photovoltaic Properties ◽  
Device Structures ◽  
Donor Acceptor ◽  
Medium Band ◽  
Inverted Solar Cell ◽  
Conventional Device

We synthesized medium-band-gap donor-acceptor (D-A) -type conjugated polymers (PBTZCZ-L and PBTZCZ-H) consisting of a benzotriazole building block as an acceptor and a carbazole unit as a donor. In comparison with the polymers, a small conjugated molecule (BTZCZ-2) was developed, and its structural, thermal, optical, and photovoltaic properties were investigated. The power conversion efficiency (PCE) of the BTZCZ-2-based solar cell devices was less than 0.5%, considerably lower than those of polymer-based devices with conventional device structures. However, inverted solar cell devices configured with glass/ITO/ZnO:PEIE/BTZCZ-2:PC71BM/MoO3/Ag showed a tremendously improved efficiency (PCE: 5.05%, Jsc: 9.95 mA/cm2, Voc: 0.89 V, and FF: 57.0%). We believe that this is attributed to high energy transfer and excellent film morphologies.

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