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.

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).

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.

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.

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...

scholarly journals Small-Molecule Donor/Polymer Acceptor Type Organic Solar Cells: Effect of Terminal Groups of Small-Molecule Donors

2019 ◽  
Vol 01 (01) ◽  
pp. 088-094 ◽  
Author(s):  
Junhui Miao ◽  
Bin Meng ◽  
Jun Liu ◽  
Lixiang Wang
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
Photovoltaic Performance ◽  
Terminal Group ◽  
Device Performance ◽  
The Core ◽  
Polymer Acceptor ◽  
The One

Small-molecule donor/polymer acceptor type (MD/PA-type) organic solar cells (OSCs) have the great advantage of superior thermal stability. However, very few small molecular donors can match polymer acceptors, leading to low power conversion efficiency (PCE) of MD/PA-type OSCs. In this work, we studied the effect of terminal groups of small molecular donors on the optoelectronic properties and OSC device performance of MD/PA-type OSCs. We select a benzodithiophene unit bearing carbazolyl substituents as the core, terthiophene as the bridging unit, and electron-withdrawing methyl 2-cyanoacetate, 3-ethylrhodanine, and 2H-indene-1,3-dione as the terminal groups to develop three small-molecule donors. With the increase of the electron-withdrawing capability of the terminal groups, the small molecular donors exhibit redshifted absorption spectra and downshifted LUMO levels. Among the three small-molecule donors, the one with 3-ethylrhodanine terminal group exhibits the best photovoltaic performance with the PCE of 8.0% in MD/PA-type OSCs. This work provides important guidelines for the design of small-molecule donors for MD/PA-type OSC applications.

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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