scholarly journals Effect of 4-biphenyl groups on the charge transport and photovoltaic properties of arylamine based push–pull systems

2020 ◽  
Vol 44 (27) ◽  
pp. 11441-11447 ◽  
Author(s):  
Pablo Simón Marqués ◽  
José María Andrés Castán ◽  
Pierre Josse ◽  
Martin Blais ◽  
Amir Hossein Habibi ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Fill Factor ◽  
Power Conversion ◽  
Photovoltaic Properties ◽  
Pull Systems ◽  
Planar Heterojunction ◽  
Conversion Efficiencies

The synthesis of two N,N-bis(4-biphenylyl)aniline (BPA) based push–pull is reported herein. Evaluation as donor materials in all-small-molecule planar-heterojunction organic solar cells lead to impressive fill factor (>73%) and promising power conversion efficiencies.

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).

scholarly journals Improved Reliability of Small Molecule Organic Solar Cells by Double Anode Buffer Layers

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Pao-Hsun Huang ◽  
Chien-Jung Huang ◽  
Kan-Lin Chen ◽  
Jhong-Ciao Ke ◽  
Yeong-Her Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Fill Factor ◽  
Copper Phthalocyanine ◽  
Open Circuit ◽  
Buffer Layers ◽  
Double Layers ◽  
Temperature And Pressure ◽  
Planar Heterojunction

An optimized hybrid planar heterojunction (PHJ) of small molecule organic solar cells (SM-OSCs) based on copper phthalocyanine (CuPc) as donor and fullerene (C60) as acceptor was fabricated, which obviously enhanced the performance of device by sequentially using both MoO3and pentacene as double anode buffer layers (ABL), also known as hole extraction layer (HEL). A series of the vacuum-deposited ABL, acting as an electron and exciton blocking layer, were examined for their characteristics in SM-OSCs. The performance and reliability were compared between conventional ITO/ABL/CuPc/C60/BCP/Ag cells and the new ITO/double ABL/CuPc/C60/BCP/Ag cells. The effect on the electrical properties of these materials was also investigated to obtain the optimal thickness of ABL. The comparison shows that the modified cell has an enhanced reliability compared to traditional cells. The improvement of lifetime was attributed to the idea of double layers to prevent humidity and oxygen from diffusing into the active layer. We demonstrated that the interfacial extraction layers are necessary to avoid degradation of device. That is to say, in normal temperature and pressure, a new avenue for the device within double buffer layers has exhibited the highest values of open circuit voltage (Voc), fill factor (FF), and lifetime in this work compared to monolayer of ABL.

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.

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.

scholarly journals Enhancement of charge transport properties of small molecule semiconductors by controlling fluorine substitution and effects on photovoltaic properties of organic solar cells and perovskite solar cells

2016 ◽  
Vol 7 (11) ◽  
pp. 6649-6661 ◽  
Author(s):  
Jae Hoon Yun ◽  
Sungmin Park ◽  
Jin Hyuck Heo ◽  
Hyo-Sang Lee ◽  
Seongwon Yoon ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Transport Properties ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Perovskite Solar Cells ◽  
Photovoltaic Properties ◽  
Fluorine Substitution ◽  
Molecular Semiconductor

Effects of fluorine substitution of small molecular semiconductor on charge transport and photovoltaic properties are systematically studied.

scholarly journals A-D-A-Type Oligothiophenes Containing Benzothiadiazole Terminal Units for Small Molecule Organic Solar Cells

2014 ◽  
Vol 2 (1) ◽  
Author(s):  
Simon Steinberger ◽  
Amaresh Mishra ◽  
Gisela Schulz ◽  
Christian Uhrich ◽  
Martin Pfeiffer ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Power Conversion ◽  
Visible Spectrum ◽  
Photovoltaic Properties ◽  
Acceptor Group ◽  
Moderate Power ◽  
Conversion Efficiencies ◽  
Homo Lumo

AbstractThe electron-deficient, fused-heterocyclebenzo[c][1,2,5]thiadiazole (BTDA) is investigated as acceptor group in A-D-A-type oligothiophenes in order to correlate their relative acceptor strength with opto-electronic and photovoltaic properties. In this respect, two novel BDTA-capped oligothiopheneswere synthesized and characterized by optical and electrochemical measurements. They showed broad absorptions in the visible spectrum and HOMO-LUMO energies well suited for organic solar cells. The attachment of terminal BTDA acceptor units to the conjugated oligothiophene backbone resulted in a hypsochromic shift in UV-Vis absorption and larger band gap in comparison to previously reported analogous dicyanovinylene (DCV)-substituted oligothiophenes indicating that BDTA is a weaker acceptor than DCV. Vacuumprocessed m-i-p (metal-intrinsic-p-doped)-type bilayer solar cells using these co-oligomers as donor and C60 as acceptor gave moderate power conversion efficiencies of around 1.0%. Bulk-heterojunction (BHJ) solar cells prepared by solution-processing using fullerene PC61BM as acceptor generated slightly lower efficiencies of 0.9%, whichwere increased to 1.5% by using the higher fullerene PC71BM. It was found that the cell efficiencies were mostly limited by the low photocurrent densities due to moderate light absorption in the bilayer devices and low fill factors coming from inefficient charge transport in the solutionprocessed BHJ devices.

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