Aromatic end-capped acceptor effects on molecular stacking and the photovoltaic performance of solution-processable small molecules

2018 ◽  
Vol 6 (44) ◽  
pp. 22077-22085 ◽  
Author(s):  
Dan Deng ◽  
Yang Yang ◽  
Wenjun Zou ◽  
Yajie Zhang ◽  
Zhen Wang ◽  
...  
Keyword(s):  
Small Molecules ◽  
Photovoltaic Performance ◽  
Molecular Properties ◽  
Solution Processable ◽  
Molecular Stacking

Four small molecules were designed and synthesized with various acceptors, and their acceptor effects on molecular properties and device performances were investigated. The molecules based on medium strong acceptors obtained excellent efficiencies (ranged from 8.5% to 10.1%).

Benzothiadiazole building units in solution-processable small molecules for organic photovoltaics

2016 ◽  
Vol 4 (41) ◽  
pp. 15771-15787 ◽  
Author(s):  
Jia Du ◽  
Michael C. Biewer ◽  
Mihaela C. Stefan
Keyword(s):  
Small Molecules ◽  
Electron Acceptor ◽  
Organic Photovoltaics ◽  
Photovoltaic Performance ◽  
Optoelectronic Properties ◽  
Recent Advances ◽  
Solution Processable ◽  
Molecular Semiconductors ◽  
The Relationship

This review attempts to summarize recent advances with respect to solution-processable molecular semiconductors having 2,1,3-benzothiadiazole or its fluorine substituted derivatives as electron-acceptor units published in the last few years. The relationship between the structure, optoelectronic properties, and photovoltaic performance of these molecular semiconductors is discussed.

scholarly journals Solution processable diketopyrrolopyrrole (DPP) cored small molecules with BODIPY end groups as novel donors for organic solar cells

2014 ◽  
Vol 10 ◽  
pp. 2683-2695 ◽  
Author(s):  
Diego Cortizo-Lacalle ◽  
Calvyn T Howells ◽  
Upendra K Pandey ◽  
Joseph Cameron ◽  
Neil J Findlay ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Organic Solar Cells ◽  
Photovoltaic Performance ◽  
Photovoltaic Properties ◽  
Tddft Calculations ◽  
End Groups ◽  
Solution Processable ◽  
Dft And Tddft Calculations ◽  
Molar Extinction Coefficients

Two novel triads based on a diketopyrrolopyrrole (DPP) central core and two 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) units attached by thiophene rings have been synthesised having high molar extinction coefficients. These triads were characterised and used as donor materials in small molecule, solution processable organic solar cells. Both triads were blended with PC71BM as an acceptor in different ratios by wt % and their photovoltaic properties were studied. For both the triads a modest photovoltaic performance was observed, having an efficiency of 0.65%. Moreover, in order to understand the ground and excited state properties and vertical absorption profile of DPP and BODIPY units within the triads, theoretical DFT and TDDFT calculations were performed.

Design and synthesis of solution processable small molecules towards high photovoltaic performance

2011 ◽  
Vol 21 (7) ◽  
pp. 2159-2168 ◽  
Author(s):  
Zaifang Li ◽  
Qingfeng Dong ◽  
Yaowen Li ◽  
Bin Xu ◽  
Meng Deng ◽  
...  
Keyword(s):  
Small Molecules ◽  
Photovoltaic Performance ◽  
Design And Synthesis ◽  
Solution Processable

Efficient strategies to improve photovoltaic performance of A-D-A type small molecules by introducing rigidly fluorinated central cores

2017 ◽  
Vol 147 ◽  
pp. 505-513 ◽  
Author(s):  
Zhongbin Qiu ◽  
Xiaopeng Xu ◽  
Shuai Zhang ◽  
Pu Wang ◽  
Yafei Wang ◽  
...  
Keyword(s):  
Small Molecules ◽  
Photovoltaic Performance

High performance solution-processable tetrathienoacene (TTAR) based small molecules for organic field effect transistors (OFETs)

2017 ◽  
Vol 53 (43) ◽  
pp. 5898-5901 ◽  
Author(s):  
Sureshraju Vegiraju ◽  
Deng-Yi Huang ◽  
Pragya Priyanka ◽  
Yo-Shan Li ◽  
Xian-Lun Luo ◽  
...  
Keyword(s):  
Small Molecules ◽  
Field Effect ◽  
High Performance ◽  
Field Effect Transistors ◽  
Organic Field Effect Transistors ◽  
Solution Processable

DDTT-TTARexhibits the highest mobility of 0.81 cm2V−1s−1.

scholarly journals Star-shaped hexaaryltriindoles small molecules: Tuning molecular properties towards solution processed organic light emitting devices

2012 ◽  
Vol 13 (10) ◽  
pp. 2138-2148 ◽  
Author(s):  
Carmen Coya ◽  
Constanza Ruiz ◽  
Ángel Luis Álvarez ◽  
Susana Álvarez-García ◽  
Eva M. García-Frutos ◽  
...  
Keyword(s):  
Small Molecules ◽  
Molecular Properties ◽  
Solution Processed ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices

Improving Photovoltaic Performance of the Linear A-Ar-A-type Small Molecules with Diketopyrropyrrole Arms by Tuning the Linkage Position of the Anthracene Core

2015 ◽  
Vol 7 (33) ◽  
pp. 18292-18299 ◽  
Author(s):  
Xiongwei Duan ◽  
Manjun Xiao ◽  
Jianhua Chen ◽  
Xiangdong Wang ◽  
Wenhong Peng ◽  
...  
Keyword(s):  
Small Molecules ◽  
Photovoltaic Performance ◽  
Linkage Position

scholarly journals Effect of Side-Chain Variation on Single-Crystalline Structures for Revealing the Structure–Property Relationships of Organic Solar Cells

2020 ◽  
Vol 02 (01) ◽  
pp. 026-032
Author(s):  
Chen Yang ◽  
Liu Yuan ◽  
Ruimin Zhou ◽  
Zhen Wang ◽  
Jianqi Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Single Crystal ◽  
Crystal Structures ◽  
Organic Solar Cells ◽  
Short Circuit ◽  
Photovoltaic Performance ◽  
Side Chains ◽  
Single Crystal Structures ◽  
Stacking Structure ◽  
Molecular Stacking

The molecular stacking assembly in the active layer plays a significant role in the photovoltaic performance of organic solar cells (OSCs). Here, we report two new small molecular donors with different side chains, FBT-O and FBT-H, and their corresponding fullerene-based OSCs. A slight change in the side chains led to a big difference in the power conversion efficiencies (PCEs). Although the molecular structures of the two donors are similar to each other, PCEs of the devices based on FBT-O were almost three times higher than those of the devices based on FBT-H, with manifold short-circuit current density, fill factor, as well as three orders of magnitude enhancement in the hole mobility. The difference in their single crystal structures was thoroughly investigated, whereby the FBT-O exhibited better planarity leading to appropriate phase separation and domain size. Furthermore, two-dimensional grazing-incidence wide-angle X-ray scattering results of the blend films revealed that the two donors retained a similar stacking structure as compared to the single-crystal structures, thus, establishing a clear relationship between the molecular stacking structure and the device performance.

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