Enhancement of Organic Solar Cell Performance by Utilizing Cupper Phthalocyanine

2020 ◽  
Vol 17 (1) ◽  
pp. 1-5
Author(s):  
Shatha A. Aldaghfag
Keyword(s):  
Solar Cells ◽  
Active Layer ◽  
Conversion Efficiency ◽  
Solar Cell Performance ◽  
Active Layers ◽  
Atomic Force ◽  
Vis Spectroscopy ◽  
Evaporation Technique ◽  
Optical Variation ◽  
Photoelectrical Conversion Efficiency

An approach for improving the photoelectrical conversion efficiency of hetero-junction solar cells based on lead phthalocyanine, by incorporating cupper phthalocyanine with co-evaporation technique into the active layer has been reported in this work, the effect of adding cupper phthalocyanine (CuPc) have been studied. The morphological, optical, and electrical properties of PbPc active layer and blend have been reported. Atomic force microscope study shows a change in the roughness, UV-VIS Spectroscopy revealed that the absorbance of PbPc films increases in the blend case and has a main Q-band at wavelength 748 nm and the electrical study showed a change in (I–V) characteristics, the photoelectrical conversion efficiency (PCE) of solar cells increases. The photovoltaic parameters are discussed based on the morphology and optical variation of the active layers.

Improving the efficiency of polymer solar cells via a treatment of methanol : water on the active layers

2016 ◽  
Vol 4 (24) ◽  
pp. 9644-9652 ◽  
Author(s):  
Biao Guo ◽  
Weilong Zhou ◽  
Mengchun Wu ◽  
Junjie Lv ◽  
Chengzhuo Yu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Active Layer ◽  
Conversion Efficiency ◽  
Polymer Solar Cells ◽  
Power Conversion ◽  
Active Layers

Significant improvement in the power conversion efficiency (PCE) of polymer solar cells (PSCs) has been observed when the active layer was treated with a mixture of methanol and water (M : W).

Vertically Optimized Phase Separation with Improved Exciton Diffusion Enables High-Efficiency Organic Solar Cells with Thick Active Layers

2021 ◽  
Author(s):  
Yanming Sun ◽  
Yunhao Cai ◽  
Qian Li ◽  
Guanyu Lu ◽  
Hwa Sook Ryu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Active Layer ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Diffusion Length ◽  
Active Layer Thickness ◽  
Exciton Diffusion ◽  
Exciton Diffusion Length ◽  
Active Layers

Abstract The development of high-performance organic solar cells (OSCs) with thick active layers is of crucial importance for the roll-to-roll printing of large-area solar panels. Unfortunately, increasing the active layer thickness usually results in a significant reduction in efficiency. Herein, we fabricated efficient thick-film OSCs with an active layer consisting of one polymer donor and two non-fullerene acceptors. The two acceptors were found to possess enlarged exciton diffusion length in the mixed phase, which is beneficial to exciton generation and dissociation. Additionally, layer by layer approach was employed to optimize the vertical phase separation. Benefiting from the synergetic effects of enlarged exciton diffusion length and graded vertical phase separation, a record high efficiency of 17.31% (certified value of 16.9%) was obtained for the 300 nm-thick OSC, with an unprecedented short-circuit current density of 28.36 mA cm−2, and a high fill factor of 73.0%. Moreover, the device with an active layer thickness of 500 nm also shows a record efficiency of 15.21%. This work provides new insights into the fabrication of high-efficiency OSCs with thick active layers.

Engineering Polymer Solar Cells: Advancement in Active Layer Thickness and Morphology

2021 ◽  
Author(s):  
Ritesh Kant Gupta ◽  
Rabindranath Garai ◽  
Maimur Hossain ◽  
Mohammad Adil Afroz ◽  
Dibashmoni Kalita ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Layer Thickness ◽  
Active Layer ◽  
Conversion Efficiency ◽  
High Power ◽  
Polymer Solar Cells ◽  
Power Conversion ◽  
Active Layer Thickness ◽  
High Power Conversion Efficiency

Achieving high power conversion efficiency (PCE) polymer solar cells (PSCs) has been very challenging and the ultimate goal for their commercialization. Precise investigation of the active layer morphology and newer...

Optimized TiO2 Nanocrystallites Aggregates for Enhanced Efficiency in Dye Solar Cells

2014 ◽  
Vol 917 ◽  
pp. 35-44 ◽  
Author(s):  
Siti Nur Azella Zaine ◽  
Norani Muti Mohamed ◽  
Mohamad Azmi Bustam
Keyword(s):  
Solar Cells ◽  
Light Scattering ◽  
Water Content ◽  
Calcination Temperature ◽  
Conversion Efficiency ◽  
Internal Surface Area ◽  
Solar Simulator ◽  
Vis Spectroscopy ◽  
Dye Solar Cells ◽  
28 Nm

TiO2 aggregates-based dye solar cells (DSCs) have gained an increasing attention due to their enhanced harvesting of light radiance. The capability of this photoelectrode material is attributed to the submicron spherical aggregates that introduce light scattering effect which can generate more electrons whilst high internal surface area for dye chemisorption is provided by nanocrystallites which made up the aggregates. Here, TiO2 aggregates (0.45-0.20 μm) composing of nanocrystallites (10-28 nm) with desired physicochemical properties for enhanced overall light conversion efficiency of DSC were synthesized by varying the water content in the hydrolysis of titanium alkoxide in ethanol and calcination temperature. TiO2 aggregates obtained were characterized using FESEM, XRD and UV-Vis spectroscopy. The assembled DSCs were then evaluated using solar simulator under AM 1.5 (100 mW/cm2) simulated sunlight. With higher water content in the hydrolysis process, the aggregates reduce in size and lose their spherical shapes resulting in lower absorption intensity indicating the occurrence of low light scattering in the TiO2 film. Nanocrystallites were found to have an increasing size of 12 nm to 28 nm with increasing calcination temperature of 400°C to 700°C. Sample of aggregates calcined at 450°C recorded the highest efficiency (~4%). Highest conversion efficiency was observed for DSC that used well-defined spherical TiO2 aggregates composing of nanocrystallites which were synthesized at optimum synthesis parameter which is by using ethanol with low water content (0.9 vol%) followed by calcination at 450°C. Thus, optimized TiO2 nanocrystallites which form spherical aggregate is critical in order to improve light harvesting efficiency of DSCs.

Chemical Composition Dependence of Cu2ZnSnS4 Absorbers Fabricated by Sulfurization of Thermal Evaporated Metal Precursors and Solar Cell Performance

2015 ◽  
Vol 1738 ◽  
Author(s):  
Liyuan Zhang ◽  
Sreejith Karthikeyan ◽  
Mandip J. Sibakoti ◽  
Stephen A. Campbell
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Solar Cell ◽  
Chemical Composition ◽  
Conversion Efficiency ◽  
Small Deviation ◽  
Short Circuit ◽  
Cell Performance ◽  
Czts Thin Film ◽  
Solar Cell Performance

ABSTRACTWe investigate the synthesis of kesterite Cu2ZnSnS4 (CZTS) thin films using thermal evaporation from copper, zinc and tin pellets and post-annealing in a sulfur atmosphere. The effects of chemical composition were studied both on the absorber layer properties and on the final solar cell performance. It is confirmed that CZTS thin film chemical composition affects the carrier concentration profile, which then influences the solar cell properties. Solar cells using a CZTS thin film with composition ratio Cu/(Zn+Sn) = 0.87, and Zn/Sn = 1.24 exhibited an open-circuit voltage of 483 mV, a short-circuit current of 14.54 mA/cm2, a fill factor of 37.66 % and a conversion efficiency of 2.64 %. Only a small deviation from the optimal chemical composition can drop device performance to a lower level, which confirms that the CZTS solar cells with high conversion efficiency existed in a relatively narrow composition region.

Electro-Optical Simulation Of In Ultra-Thin Photonic Crystal Amorphous Silicon Solar Cells

2019 ◽  
Vol 5 (2) ◽  
pp. 10-21
Author(s):  
Abdelhak Merabti ◽  
Abdelkader Bensliman ◽  
Mahmoud Habab
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Photonic Crystal ◽  
Electric Field ◽  
Active Layer ◽  
Conversion Efficiency ◽  
Cell Structure ◽  
Photovoltaic Performance ◽  
Optical Simulation ◽  
Geometrical Parameters

Hydrogenated amorphous Si (a-Si:H) is an important solar cell material. The critical problem in the a-Si:H-based photovoltaic cell is increasing the conversion efficiency. To overcome the difficulty,  higher conversion efficiency demands a longer optical path  to increase optical absorption. Thus, a light trapping  structure is needed to obtain more efficient absorption. In this context, we propose a complete solar cell structure for which a 1D grating is etched into the ultrathin active absorbing layer of a one-dimensional "CP 1D" photonic crystal a-Si: H characterized by the optimal parameters: period a = 480 nm, a filling factor ff = 50% and a depth d = 150 nm. This was selected by varying the CP1D parameters to maximize the absorption integrated into the active layer. CP1D is suggested as an intermediate layer in the solar cell concentration system. This study allowed us to model the optical and electrical behavior of a CP1D solar cell. After optimization of the geometrical parameters (period and fill factor ... etc.), we concluded that the CP1D led to greater optical gains than for their unstructured equivalent. The simulation clearly illustrates that the electric field strongly affects the electro-optical characteristics of the devices studied, and that it is clear that 1D PC solar cells as active layer have exhibited a high electric field distribution. We have focused on the net on the effect of the active layer and its beneficial role in the sense of expressing the photovoltaic performance of the devices.

Large Pore Nanocrystalline TiO2 Films for Quasi-Solid State Dye-Sensitized Solar Cells

2013 ◽  
Vol 662 ◽  
pp. 177-181
Author(s):  
Jian Gao ◽  
Hao Ran Li ◽  
Hua Rong ◽  
Yu Hua Dai
Keyword(s):  
Solar Cells ◽  
Solid State ◽  
Conversion Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Photovoltaic Conversion ◽  
Photovoltaic Conversion Efficiency ◽  
Large Pore ◽  
Vis Spectroscopy ◽  
Sensitized Solar Cells

Photoelectrodes of mixed polymethylmethacrylate (PMMA) and TiO2paste with different ratios were fabricated and studied for improved photovoltaic conversion efficiency in quasi-solid state dye-sensitized solar cells(QS-DSCs). The large pore nanocrystalline TiO2films were prepared by the doctor blade method and charicterized by SEM and UV-Vis spectroscopy. SEM images show that large pores have been formed in the TiO2films. The transmittance of the films increased with an increase amount of PMMA, while the light-absorption decreased when the films covered by dyes. I-V curves show that a relatively high photovoltaic conversion efficiency of 2.1%~2.26% was achieved when the PMMA/ TiO2paste weight ratio was in the range of 1:25~1:35 under AM 1.5 illumination at 100mW/cm2.

Fluorine-induced self-doping and spatial conformation in alcohol-soluble interlayers for highly-efficient polymer solar cells

2018 ◽  
Vol 6 (2) ◽  
pp. 423-433 ◽  
Author(s):  
Xiufen Jin ◽  
Yilin Wang ◽  
Xiaofang Cheng ◽  
Huanyu Zhou ◽  
Lin Hu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Active Layer ◽  
Conversion Efficiency ◽  
Polymer Solar Cells ◽  
Power Conversion ◽  
Interface Engineering ◽  
Highly Efficient ◽  
Engineering Strategy

A new interface engineering strategy for non-fullerene polymer solar cells by employing a highly conductive interlayer with a fluorinated conjugated backbone to afford a power conversion efficiency of 11.51% based on the PBDB-T:ITIC active layer.

Fully conjugated block copolymers for single-component solar cells: synthesis, purification, and characterization

2016 ◽  
Vol 40 (2) ◽  
pp. 1825-1833 ◽  
Author(s):  
Shifan Wang ◽  
Qingqing Yang ◽  
Youtian Tao ◽  
Yan Guo ◽  
Jie Yang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Block Copolymer ◽  
Block Copolymers ◽  
Power Conversion Efficiency ◽  
Active Layer ◽  
Conversion Efficiency ◽  
Polymer Solar Cells ◽  
Power Conversion ◽  
Purification And Characterization ◽  
Preparative Gpc

All-polymer solar cells using the preparative GPC separated block copolymer P3HT-b-PBIT2 as a simple active layer show a power conversion efficiency of 1.0%.

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