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 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.

N,N-Diarylamino end-capping as a new strategy for simultaneously enhancing open-circuit voltage, short-circuit current density and fill factor in small molecule organic solar cells

RSC Advances ◽  
2015 ◽  
Vol 5 (27) ◽  
pp. 20724-20733 ◽  
Author(s):  
Daobin Yang ◽  
Youqin Zhu ◽  
Yan Jiao ◽  
Lin Yang ◽  
Qianqian Yang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Fill Factor ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
New Strategy ◽  
End Capping

N,N-Diarylamino end-capping strategy for asymmetrical squaraines with simultaneously enhanced Voc, Jsc and FF in solution-processed small molecule organic solar cells.

Synthesis and optical properties of a new triphenylamine-p-phenylenevinylene-small molecule with applications in high open-circuit voltage organic solar cells

2015 ◽  
Vol 39 (9) ◽  
pp. 7389-7396 ◽  
Author(s):  
Rui Meira ◽  
Pedro M. M. Costa ◽  
Roberto E. Di Paolo ◽  
Jorge Morgado ◽  
Luís Alcácer ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Cells ◽  
Fluorescence Quenching ◽  
Small Molecule ◽  
Electron Donor ◽  
Organic Solar Cells ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Planar Heterojunction

Fluorescence quenching studies enabled us to preview applications of a new small molecule as electron-donor in OSCs. Planar heterojunction cells are also shown.

An Improved Triple-Tandem Organic Solar Cell

2009 ◽  
Vol 1212 ◽  
Author(s):  
Dewei Zhao ◽  
Xiao Wei Sun ◽  
Lin Ke ◽  
Swee Tiam Tan
Keyword(s):  
Solar Cell ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Organic Solar Cell ◽  
Copper Phthalocyanine ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Solar Irradiation ◽  
The Third

AbstractWe present an efficient polymer-small molecule triple-tandem organic solar cell (OSC), consisting of poly(3-hexylthiophene) (P3HT) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61 (PCBM) bulk heterojunction as the first and second cells, and small molecules copper phthalocyanine (CuPc) and fullerene (C60) as the third cell on top. These sub-cells are connected by an intermediate layer of Al(1 nm)/MoO3(15 nm), which appears to be highly transparent, structurally smooth, and electrically functional. Compared to our previous all polymer triple-tandem organic solar cells (2.03%), this polymer-small molecule triple-tandem organic solar cell achieves an improved power conversion efficiency of 2.18% with a short-circuit current density (Jsc) = 3.02 mA/cm2, open-circuit voltage (Voc) = 1.51 V, and fill factor (FF) = 47.7% under simulated solar irradiation of 100 mW/cm2 (AM1.5G), which can be attributed to the increased photocurrent generation in the third cell since the third cell has the complementary absorption with two bottom cells despite a slightly reduced Voc.

scholarly journals SCAPS Simulation on P3HT:Graphene Nanocomposites Based Bulk-Heterojunction Organic Solar Cells

2019 ◽  
Vol 9 (1) ◽  
pp. 28
Author(s):  
Nur Shakina Mohd Shariff ◽  
Puteri Sarah Mohamad Saad ◽  
Mohamad Rusop Mahmood
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Fill Factor ◽  
Bulk Heterojunction ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Simulation Software ◽  
Capacitance Voltage

There has been an increasing interest towards organic solar cells after the discovery of conjugated polymer and bulk-heterojunction concept. Eventhough organic solar cells are less expensive than inorganic solar cells but the power conversion energy is still considered low. The main objective of this research is to investigate the effect of the P3HT’s thickness and concentration towards the efficiency of the P3HT:Graphene solar cells. A simulation software that is specialize for photovoltaic called SCAPS is used in this research to simulate the effect on the solar cells. The solar cell’s structure will be drawn inside the simulation and the parameters for each layers is inserted. The result such as the open circuit voltage (Voc), short circuit current density (Jsc), fill factor (FF), efficiency (η), capacitance-voltage (C-V) and capacitance-frequency (C-f) characteristic will be calculated by the software and all the results will be put into one graph.

Controlling Band Alignment at the Back Interface of Cadmium Telluride Solar Cells using ZnTe and Te Buffer Layers

MRS Advances ◽  
2019 ◽  
Vol 4 (16) ◽  
pp. 913-919 ◽  
Author(s):  
Fadhil K. Alfadhili ◽  
Adam B. Phillips ◽  
Geethika K. Liyanage ◽  
Jacob M. Gibbs ◽  
Manoj K. Jamarkattel ◽  
...  
Keyword(s):  
Solar Cells ◽  
Fill Factor ◽  
Critical Role ◽  
Open Circuit ◽  
Band Alignment ◽  
Buffer Layers ◽  
Device Performance ◽  
Band Bending ◽  
Cdte Solar Cells ◽  
Hole Current

ABSTRACTFormation of a low barrier back contact plays a critical role in improving the photoconversion efficiency of the CdTe solar cells. Incorporating a buffer layer to minimize the band bending at the back of the CdTe device can significantly lower the barrier for the hole current, improving open circuit voltage (VOC) and the fill factor. Over the past years, researchers have incorporated the both ZnTe and Te as buffer layers to improve CdTe device performance. Here we compare device performance using these two materials as buffer layers at the back of CdTe devices. We show that using Te in contact to CdTe results in higher performance than using ZnTe in contact to the CdTe. Low temperature current density-voltage measurements show that Te results is a lower barrier with CdTe than ZnTe, indicating that Te has better band alignment, resulting in less downward bending in the CdTe at the back interface, than ZnTe does.

scholarly journals 15.34% efficiency all-small-molecule organic solar cells with an improved fill factor enabled by a fullerene additive

2020 ◽  
Vol 13 (7) ◽  
pp. 2134-2141 ◽  
Author(s):  
Dingqin Hu ◽  
Qianguang Yang ◽  
Haiyan Chen ◽  
Friso Wobben ◽  
Vincent M. Le Corre ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Fill Factor ◽  
Donor And Acceptor ◽  
Bimolecular Recombination

A fullerene additive adjusts the miscibility between donor and acceptor for morphology optimization and reduces bimolecular recombination, assisting significant improvement of fill factor and efficiency.

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