Significant enhancement of responsivity of organic photodetectors upon molecular engineering

2019 ◽  
Vol 7 (19) ◽  
pp. 5739-5747 ◽  
Author(s):  
Lei Lv ◽  
Jinde Yu ◽  
Xinyu Sui ◽  
Jianfei Wu ◽  
Xiaohan Dong ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Molecular Engineering ◽  
Significant Enhancement ◽  
Side Chain ◽  
Film Morphology ◽  
Blend Film ◽  
Organic Photodetectors

Upon incorporating S⋯O noncovalent conformational locks and side chain engineering, the optical absorption and blend film morphology of molecular acceptors are effectively tuned, resulting in an enhanced photocurrent and thus a higher responsivity (from 70.5 mA W−1 to 291.3 mA W−1) for P3HT-based OPDs.

scholarly journals Synthesis of Bithiophene-Based D-A1-D-A2 Terpolymers with Different A2 Moieties for Polymer Solar Cells via Direct Arylation

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 55 ◽  
Author(s):  
Jinfeng Huang ◽  
Zhenkun Lin ◽  
Wenhuai Feng ◽  
Wen Wang
Keyword(s):  
Open Circuit Voltage ◽  
Polymer Solar Cells ◽  
Energy Levels ◽  
Open Circuit ◽  
Side Chain ◽  
Film Morphology ◽  
Photovoltaic Properties ◽  
Direct Arylation ◽  
Blend Film ◽  
Highest Occupied Molecular Orbital

A series of bithiophene (2T)-based D-A1-D-A2 terpolymers with different A2 moieties were prepared via direct arylation reaction. In these terpolymers, pyrrolo[3,4-c]pyrrole-1,4-dione (DPP) was selected as the first electron-accepting (A1) moiety, 2,1,3-benzothiadiazole (BT) or fluorinated benzothiadiazole (FBT) or octyl-thieno[3,4-c]pyrrole-4,6-dione (TPD) or 2,1,3-benzoselendiazole (SeT) was selected as the second electron-accepting (A2) moiety, while bithiophene with hexyl side chain was used as the electron-donating moiety. The UV-vis absorption, electrochemical properties, blend film morphology, and photovoltaic properties were studied to explore the effects of the A2 moiety. It is shown that these terpolymer films exhibit broad absorption (350–1000 nm), full width at half-maximum of more than 265 nm and ordered molecular packing. Varying the A2 moiety could affect the energy levels and blend film morphology leading to different polymer solar cell (PSC) performances of these (2T)-based D-A1-D-A2 terpolymers. As a result, the highest Jsc of 10.70 mA/cm2 is achieved for Polymer 1 (P1) with BT as A2 moiety, while the higher highest occupied molecular orbital (HOMO) level limits the open circuit voltage (Voc) and leads to a power conversion efficiency (PCE) of 3.46%.

Controlling Blend Film Morphology by Varying Alkyl Side Chain in Highly Coplanar Donor–Acceptor Copolymers for Photovoltaic Application

2011 ◽  
Vol 44 (16) ◽  
pp. 6370-6381 ◽  
Author(s):  
Yaowen Li ◽  
Yujin Chen ◽  
Xing Liu ◽  
Zhong Wang ◽  
Xiaoming Yang ◽  
...  
Keyword(s):  
Side Chain ◽  
Film Morphology ◽  
Alkyl Side Chain ◽  
Blend Film ◽  
Photovoltaic Application ◽  
Donor Acceptor

Significant enhancement of photodetector performance by subtle changes in the side chains of dithienopyrrole-based polymers

RSC Advances ◽  
2016 ◽  
Vol 6 (27) ◽  
pp. 22494-22499 ◽  
Author(s):  
Liuyong Hu ◽  
Wenqiang Qiao ◽  
Ji Qi ◽  
Xiaoqin Zhang ◽  
Jinfeng Han ◽  
...  
Keyword(s):  
Significant Enhancement ◽  
Side Chain ◽  
Side Chains

The insertion of phenylene unit at side chain reduces π–π distance and promotes morphology, resulting in significant increase in responsivity.

Efficient polymer solar cells enabled by alkoxy-phenyl side-chain-modified main-chain-twisted small molecular acceptors

2020 ◽  
Vol 8 (42) ◽  
pp. 22335-22345
Author(s):  
Baofeng Zhao ◽  
Weiping Wang ◽  
Yuan Xie ◽  
Heng Zhao ◽  
Liuchang Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Main Chain ◽  
Polymer Solar Cells ◽  
Side Chain ◽  
Film Morphology

Alkoxy-phenyl-modified twisted NFAs with optimized film morphology achieve enhanced performances in polymer solar cells.

Molecular engineering of stimuli-responsive, functional, side-chain liquid crystalline copolymers: synthesis, properties and applications

2020 ◽  
Vol 11 (37) ◽  
pp. 5937-5954 ◽  
Author(s):  
Dennis Ndaya ◽  
Reuben Bosire ◽  
Samiksha Vaidya ◽  
Rajeswari M. Kasi
Keyword(s):  
Liquid Crystalline ◽  
Recent Progress ◽  
Liquid Crystalline Polymers ◽  
Molecular Engineering ◽  
Side Chain ◽  
Stimuli Responsive ◽  
Crystalline Polymers ◽  
Synthesis Properties ◽  
Made In

This review describes recent progress made in designing stimuli-responsive, functional, side-chain, end-on mesogen attached liquid crystalline polymers (LCPs).

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