scholarly journals Hole-transporting side-chain polystyrenes based on TCTA with tuned glass transition and optimized electronic properties

RSC Advances ◽  
2015 ◽  
Vol 5 (101) ◽  
pp. 83122-83128 ◽  
Author(s):  
Felix R. P. Limberg ◽  
Arunas Miasojedovas ◽  
Patrick Pingel ◽  
Felix Reisbeck ◽  
Silvia Janietz ◽  
...  
Keyword(s):  
Glass Transition ◽  
Electronic Properties ◽  
Significant Influence ◽  
Life Time ◽  
Side Chain ◽  
Hole Transporting ◽  
Solution Processable

The development of crosslinkable materials for solution processable OLEDs presents challenges, especially regarding the adjustment of the glass transition, which has a significant influence on crosslinking kinetics and device life-time.

New hole transport styrene polymers bearing highly π-extended conjugated side-chain moieties for high-performance solution-processable thermally activated delayed fluorescence OLEDs

2021 ◽  
Vol 12 (11) ◽  
pp. 1692-1699
Author(s):  
Ji Hye Lee ◽  
Jinhyo Hwang ◽  
Chai Won Kim ◽  
Amit Kumar Harit ◽  
Han Young Woo ◽  
...  
Keyword(s):  
High Performance ◽  
High Efficiency ◽  
Delayed Fluorescence ◽  
Hole Transport ◽  
Side Chain ◽  
Solution Processed ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Turn On ◽  
Solution Processable

New polystyrene-based polymers with high π-extended hole transport pendants were synthesized to obtain a low turn-on voltage and high efficiency in solution-processed green TADF-OLEDs.

Influence of Acceptor Side-Chain Length and Conjugation-Break Spacer Content on the Mechanical and Electronic Properties of Semi-Random Polymers

2019 ◽  
Vol 1 (5) ◽  
pp. 1107-1117 ◽  
Author(s):  
Elizabeth L. Melenbrink ◽  
Kristan M. Hilby ◽  
Kartik Choudhary ◽  
Sanket Samal ◽  
Negar Kazerouni ◽  
...  
Keyword(s):  
Electronic Properties ◽  
Chain Length ◽  
Side Chain ◽  
Side Chain Length ◽  
Acceptor Side

A solution-processable copper(ii) phthalocyanine derivative as a dopant-free hole-transporting material for efficient and stable carbon counter electrode-based perovskite solar cells

2017 ◽  
Vol 5 (34) ◽  
pp. 17862-17866 ◽  
Author(s):  
Xiaoqing Jiang ◽  
Ze Yu ◽  
Hai-Bei Li ◽  
Yawei Zhao ◽  
Jishuang Qu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Counter Electrode ◽  
Perovskite Solar Cells ◽  
Stable Carbon ◽  
Free Hole ◽  
Hole Transporting ◽  
Solution Processable ◽  
Phthalocyanine Derivative ◽  
Hole Transporting Material

A solution-processable copper(ii) phthalocyanine derivative CuPc-TIPS has been explored as a dopant-free hole-transporting material in carbon counter electrode-based perovskite solar cells.

Solution-processable highly efficient deep-red and orange organic light-emitting diodes based on multi-functional Ir(iii) complexes

2017 ◽  
Vol 5 (38) ◽  
pp. 10029-10038 ◽  
Author(s):  
Woosum Cho ◽  
Ganguri Sarada ◽  
Athithan Maheshwaran ◽  
Yeong-Soon Gal ◽  
Yeonsig Nam ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Improve Performance ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light ◽  
Hole Transporting ◽  
Solution Processable

Linking the hole transporting/electron transporting functional moieties to the Ir(iii) complex is a key strategy to improve performance of PhOLEDs.

Polyquinolines: Multifunctional Polymers for Electro-Optic and Light-Emitting Applications

1999 ◽  
Vol 558 ◽  
Author(s):  
Alex K.-Y. Jen ◽  
Hong Ma
Keyword(s):  
Electrical Characterization ◽  
Bright Light ◽  
Side Chain ◽  
Light Emitting ◽  
Electro Optic ◽  
Film Forming ◽  
Hole Transporting ◽  
Broad Variation ◽  
Nlo Chromophores ◽  
Multifunctional Polymers

ABSTRACTA versatile, and generally applicable modular approach for making second-order nonlinear optical (NLO) side-chain aromatic polyquinolines has been developed. This approach emphasizes the ease of incorporating NLO chromophores onto the pendent phenyl moieties of parent polyquinolines at the final stage via mild Mitsunobu reaction. This method provides the synthesis of polyquinolines with a broad variation of the polymer backbones and great flexibility in the selection of NLO chromophores. These side-chain NLO polyquinolines demonstrate high electro-optic (E-O) activity (up to 35 pm/V at 830 nm and 22 pm/V at 1300 nm, respectively) and a good combination of thermal, optical, electrical and mechanical properties.Comparatively, two new electroluminescent (EL) polyquinolines have been prepared via the Friedlander condensation and nucleophilic reaction. The resulting polymers contain a bipolar property with both an efficient hole-transporting moiety, tetraphenyldiaminobiphenyl (TPD), and an electron affinitive light-emitting moiety, bis-quinoline. In addition, they possess high thermal stability, excellent electrochemical reversibility, good thin film-forming ability, and bright light-emitting property. Electrical characterization of two-layer diode devices based on the configurations of ITO/CuPc/TPD-PQ or TPD-PQE/Al showed excellent electroluminescence performance (a rectification ratio greater than 105 and a low turn-on voltage of less than 4 V).

Side-Chain LC Block Copolymers with Well Defined Structures Prepared by Living Anionic Polymerization. 2: Effect of the Glass Transition Temperature of Amorphous Segments on the Phase Behaviour and Structure of the LC Segment

1998 ◽  
Vol 10 (1) ◽  
pp. 131-138 ◽  
Author(s):  
Masayuki Yamada ◽  
Tomomichi Itoh ◽  
Akira Hirao ◽  
Sei-Ichi Nakahama ◽  
Junji Watanabe
Keyword(s):  
Glass Transition ◽  
Anionic Polymerization ◽  
Diblock Copolymers ◽  
Domain Size ◽  
Phase Behaviour ◽  
Side Chain ◽  
Isotropic Phase ◽  
Transition Temperatures ◽  
Living Anionic Polymerization ◽  
Methyl Styrene

We have prepared two classes of LC diblock copolymers, OcSt-b-LC and MeStb-LC, by living anionic polymerization. These are composed of the side-chain LC polymer as one segment and two different amorphous polymers, poly(octyl styrene) (OcSt) and poly(α-methyl styrene) (MeSt), as the other segment. OcSt and MeSt segments have glass transition temperatures of −60 °C and 160 °C respectively, which are relatively lower and higher than the transition temperatures of crystal–SA (∼90 °C) and SA–isotropic (∼130 °C) in the LC segment. In OcSt-b-LC the lamellar domain size decreases gradually from that of the crystal phase to that of the isotropic phase, indicating that the global conformation of the backbone changes throughout the SA temperature region. In MeSt-b-LC, in contrast, no change in the lamellar size is observed and the crystallinity of the LC segment is reduced in comparison with that in OcSt-b-LC while the liquid crystal is well formed. Such a distinction between two copolymer systems, arising from an interplay between the LC and amorphous segments, shows that the global conformation of the backbone is significant for understanding the phase behaviour and structure of side-chain LC polymers.

Efficient and UV-stable perovskite solar cells enabled by side chain-engineered polymeric hole-transporting layers

2018 ◽  
Vol 6 (27) ◽  
pp. 12999-13004 ◽  
Author(s):  
Chang-Hung Tsai ◽  
Nan Li ◽  
Chia-Chen Lee ◽  
Hung-Chin Wu ◽  
Zonglong Zhu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conjugated Polymers ◽  
Perovskite Solar Cells ◽  
Side Chain ◽  
Hole Transporting ◽  
Enhance Efficiency

Biaxially-extended octithiophene-based conjugated polymers are demonstrated as effective polymeric hole-transporting layers to simultaneously enhance efficiency and UV-photostability of perovskite solar cells.

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