Energy-level modulation of coumarin-based molecular donors for efficient all small molecule fullerene-free organic solar cells

2021 ◽  
Author(s):  
Rashmirekha Pradhan ◽  
Hemraj Dahiya ◽  
Bhawani Prasad Bag ◽  
Mukhamed L. Keshtov ◽  
Rahul Singhal ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
Homo Energy ◽  
Conversion Efficiencies ◽  
Homo Energy Level

Despite their minimal HOMO energy level offset promising power conversion efficiencies up to 13.54% have been recorded for ternary organic solar cells using coumarin-based molecular donors and fullerene-free acceptors.

Recent progress in non-fullerene small molecule acceptors in organic solar cells (OSCs)

2017 ◽  
Vol 5 (6) ◽  
pp. 1275-1302 ◽  
Author(s):  
Wangqiao Chen ◽  
Qichun Zhang
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Recent Progress ◽  
Power Conversion ◽  
Conversion Efficiencies

The power conversion efficiencies (PCEs) of non-fullerene small molecule acceptors based on different donors have been compared and summarized.

Simple organic donors based on halogenated oligothiophenes for all small molecule solar cells with efficiency over 11%

2020 ◽  
Vol 8 (12) ◽  
pp. 5843-5847 ◽  
Author(s):  
Tainan Duan ◽  
Jie Gao ◽  
Tongle Xu ◽  
Zhipeng Kan ◽  
Wenjing Chen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
Conversion Efficiencies

A set of centrally halogenated oligothiophenes were developed for organic solar cells. The devices with a chlorinated donor (2Cl7T) achieved power conversion efficiencies (PCEs) of up to ca. 11.5% (vs. ca. 2.5% for non-halogenated donor DRCN7T).

The effect of alkylthio side chains in oligothiophene-based donor materials for organic solar cells

2018 ◽  
Vol 3 (1) ◽  
pp. 131-141 ◽  
Author(s):  
Yan Zou ◽  
Yue Wu ◽  
Hang Yang ◽  
Yingying Dong ◽  
Chaohua Cui ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Solar Cells ◽  
Energy Level ◽  
Small Molecules ◽  
Organic Solar Cells ◽  
Side Chains ◽  
Homo Energy ◽  
Backbone Conformation ◽  
Molecular Backbone ◽  
Homo Energy Level

The engineering of alkylthio side chains in the molecular conjugated backbone of small molecules is in favor of achieving a linear molecular backbone conformation, slightly red-shifting the absorption spectrum, and down-shifting the HOMO energy level of the resulting molecule.

scholarly journals Crystallites ofα-Sexithiophene in Bilayer Small Molecule Organic Solar Cells Double Efficiency

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Michal Radziwon ◽  
André Luis Fernandes Cauduro ◽  
Morten Madsen ◽  
Horst-Günter Rubahn
Keyword(s):  
Solar Cells ◽  
Research And Development ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
Device Performance ◽  
Performance Parameters ◽  
Efficiency Increase ◽  
Conversion Efficiencies

Recent efforts in research and development of small molecule based organic solar cells have led to power conversion efficiencies exceeding 10%. Understanding the incorporated interfaces in these devices is an utterly important parameter for their improvement. Here we investigate the influence ofα-sexithiophene (α-6T) nanostructures on the performance parameters ofα-6T/C60inverted bilayer solar cells. Byin situcontrolled growth, crystallineα-6T nanostructures are formed in the devices and a correlation between the morphology of the structures and the device performance is presented. Under certain, well-defined circumstances, we observe an efficiency increase of around 100% when implementing crystalline nanostructures.

High-efficiency non-fullerene organic solar cells enabled by a difluorobenzothiadiazole-based donor polymer combined with a properly matched small molecule acceptor

2015 ◽  
Vol 8 (2) ◽  
pp. 520-525 ◽  
Author(s):  
Jingbo Zhao ◽  
Yunke Li ◽  
Haoran Lin ◽  
Yuhang Liu ◽  
Kui Jiang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Power Conversion ◽  
Donor And Acceptor ◽  
Conversion Efficiencies ◽  
Matched Donor

Non-fullerene organic solar cells with power conversion efficiencies of up to 6.3% are reported using properly matched donor and acceptor.

A fluorene-core-based electron acceptor for fullerene-free BHJ organic solar cells—towards power conversion efficiencies over 10%

2018 ◽  
Vol 54 (32) ◽  
pp. 4001-4004 ◽  
Author(s):  
Suman Suman ◽  
Anirban Bagui ◽  
Ashish Garg ◽  
Barkha Tyagi ◽  
Vinay Gupta ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Small Molecule ◽  
Electron Acceptor ◽  
Organic Solar Cells ◽  
Organic Solar Cell ◽  
Power Conversion ◽  
Conversion Efficiencies

A small molecule non-fullerene electron acceptor (SMNFEA), bearing a furan π-spacer and dicyano-n-hexyl rhodanine as flanking groups, was designed and synthesized for organic solar cell applications.

Highly efficient small molecule solar cells fabricated with non-halogenated solvents

RSC Advances ◽  
2015 ◽  
Vol 5 (112) ◽  
pp. 92312-92317 ◽  
Author(s):  
Liangang Xiao ◽  
Chang Liu ◽  
Ke Gao ◽  
Yajing Yan ◽  
Junbiao Peng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
High Power ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Power Conversion ◽  
Highly Efficient ◽  
Halogenated Solvents ◽  
Conversion Efficiencies

Fabricated with non-halogenated solvents toluene and o-xylene, the bulk-heterojunction organic solar cells based on a porphyrin small molecule show high power conversion efficiencies up to 5.46% and 5.85%, respectively.

Importance of molecular rigidity on reducing the energy losses in organic solar cells: Implication from geometric relaxations of A-D-A electron acceptors

2021 ◽  
Author(s):  
Ruihong Duan ◽  
Guangchao Han ◽  
Lingbo Qu ◽  
Yuanping Yi
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
Electron Acceptors ◽  
Energy Losses ◽  
Donor Acceptor ◽  
Molecular Rigidity ◽  
Conversion Efficiencies

Owing to the emergence of small-molecule acceptors with acceptor-donor-acceptor (A-D-A) structures, organic solar cells (OSCs) have developed rapidly in recent years. Currently, the power conversion efficiencies (PCEs) of the OSCs...

Fluorinated oligothiophene donors for high-performance nonfullerene small-molecule organic solar cells

2020 ◽  
Vol 4 (6) ◽  
pp. 2680-2685 ◽  
Author(s):  
Tongle Xu ◽  
Yuying Chang ◽  
Cenqi Yan ◽  
Qianguang Yang ◽  
Zhipeng Kan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
High Performance ◽  
Power Conversion ◽  
Electron Donors ◽  
Conversion Efficiencies

Two oligothiophenes were synthesized and used as electron donors in organic solar cells. The devices with a fluorinated donor (2FDC5T) achieved power conversion efficiencies of up to ca. 9.02% (vs. ca. 7.03% for the non-halogenated donor DC5T).

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