Laser Treatment of Organic Thin Film Solar Cells

2011 ◽  
Vol 1285 ◽  
Author(s):  
Maurice Clair ◽  
Christian Scholz ◽  
Bernd Keiper ◽  
Jens Haenel
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Solar Cell ◽  
Active Layer ◽  
Indium Tin Oxide ◽  
Laser Annealing ◽  
Acid Methyl Ester ◽  
Polymer Materials ◽  
Organic Thin Film ◽  
Future Production

ABSTRACTIn the last years more and more effort has been put into the development of thin-film organic solar cells using conductive and semi-conductive polymers. A great advantage of these polymers is the possibility to deposit them in high throughput print and coating processes. This feature provides huge potential for future production of low cost photovoltaics. While TCO layers form the transparent front contact, polymers are used for the buildup of the active layer and the design of the interface between active layer and front contact. The polymer materials have to be patterned in order to allow for a row connection of the solar cell work (typically by structured deposition, e.g. printing). In addition the bulk hetero junction (BHJ) of the active layer consisting of poly(3-hexylthiophene):phenyl-C61-butyric acid methyl ester (P3HT:PCBM) requires an annealing step to optimize the layers structure and therewith the efficiency of the solar cell (typically by thermal treatment, e.g. oven). 3D-Micromac used ultra-short pulsed lasers to evaluate the applicability of various wavelengths for the selective ablation of the BHJ consisting of P3HT:PCBM on top of a Poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) and indium tin oxide (ITO) film system on glass substrates. The process of laser annealing was investigated using a short-pulsed laser with a wavelength close to the absorption maxima of the BHJ.

scholarly journals Fabrication and Characteristics of Organic Thin-film Solar Cells with Active Layer of Interpenetrated Hetero-junction Structure

2012 ◽  
Vol 4 (4) ◽  
Author(s):  
Im-Jun No ◽  
Paik-Kyun Shin ◽  
Santhakumar Kannappan ◽  
Palanisamy Kumar ◽  
Shizuyasu Ochiai
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Active Layer ◽  
Thin Film Solar Cells ◽  
Organic Thin Film ◽  
Junction Structure

Improve Efficiency of Organic Solar Cell by Adding Dispersed ZnO Nanoparticles

2013 ◽  
Vol 842 ◽  
pp. 43-51
Author(s):  
Yang Ming Lu ◽  
Yu Fan Wu ◽  
Lien Chung Hsu
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Active Layer ◽  
Zno Nanoparticles ◽  
Polymer Solar Cells ◽  
Short Circuit ◽  
Weight Ratio ◽  
Acid Methyl Ester ◽  
Well Being ◽  
Organic Polymer

The poly (3-hexylthiophene) (P3HT) is a promising candidate material for using in polymer solar cells researches due to its good absorbance and stability. In this study, we present the electro-optical performance of organic polymer solar cells based on P3HT: [6,-phenyl-C61-butyric acid methyl ester (PCBM) with weight ratio of 1:1. We added ZnO nanoparticles into the blending of P3HT and PCBM to improve the performance of polymer solar cells. ZnO nanoparticles are very promising inorganic metal oxides for use in organic solar cells because of its low cost, nontoxicity, high reflectance and good electron transport properties. The morphology of polymer solar cell was improved due to the additional of ZnO nanoparticles. The effects of thermal annealing on the solar cell had been studied. The post-annealing shows significant improvement in the performance for solar cell. How to prevent ZnO nanoparticles to agglomerate is essential as they are added to the active layer of the solar cell. Well dispersed ZnO nanoparticles are obtained by using the methanol solvent. The best performances of the solar cell with short-circuit current density of 14.66 mW/cm2 and efficiency of 3.92% can be obtained after post-annealed with well being dispersed 1.3wt% ZnO nanoparticles in the active layer.

scholarly journals Active layer analysis of interpenetrating heterojunction organic thin-film solar cells by X-ray photoelectron spectroscopy

2014 ◽  
Vol 554 ◽  
pp. 222-225 ◽  
Author(s):  
Tetsuro Hori ◽  
Akitoshi Semba ◽  
Sunghwan Lee ◽  
Hitoshi Kubo ◽  
Akihiko Fujii ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Active Layer ◽  
Photoelectron Spectroscopy ◽  
Thin Film Solar Cells ◽  
Organic Thin Film ◽  
X Ray ◽  
Layer Analysis

Enhanced omnidirectional photon coupling via quasi-periodic patterning of indium-tin-oxide for organic thin-film solar cells

2011 ◽  
Vol 12 (6) ◽  
pp. 886-890 ◽  
Author(s):  
Ping-Chen Tseng ◽  
Min-Hsiang Hsu ◽  
Min-An Tsai ◽  
Chih-Wei Chu ◽  
Hao-Chung Kuo ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Thin Film Solar Cells ◽  
Organic Thin Film ◽  
Photon Coupling

Effect of 1,8-Diiodooctane on the Performance of P3HT:PCBM Solar Cells

2015 ◽  
Vol 137 (3) ◽  
Author(s):  
M. Nasiri ◽  
F. Abbasi
Keyword(s):  
Solar Cells ◽  
Active Layer ◽  
Indium Tin Oxide ◽  
Short Circuit ◽  
Acid Methyl Ester ◽  
Short Circuit Current ◽  
Xrd Analysis ◽  
Open Circuit ◽  
Force Microscopy ◽  
Uv Visible

Effect of 1,8-diiodooctane on the performance of poly(3-hexylthiophene) (P3HT):[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) solar cells with glass/indium tin oxide (ITO)/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/P3HT: PCBM/Ca/Al structure was studied. The morphology and thickness of the active layer were investigated using atomic force microscopy (AFM). The UV-visible spectroscopy and X-ray diffraction (XRD) analysis were used to study the absorption behavior (of the solutions and coated layers) and crystallinity of the active layer, respectively. The results show that the existence of 1,8-diiodooctane reduced the open circuit voltage from 0.81 to 0.52 V and increased the short circuit current by about three folds; the fill factor (FF) and power conversion efficiency were increased from 36.0 to 54.1% and 0.47% to 1.54%, respectively. These changes can be attributed to the enhanced crystallinity of P3HT or the doping effect of 1,8-diiodooctane on P3HT chains. UV-visible analysis demonstrated that the addition of 1,8-diiodooctane to the solution did not change the absorption onset, whereas in the coated layers, the maximum absorption peak shifted to higher wavelengths. The XRD analyses demonstrated the enhancement of crystallinity of P3HT upon the introduction of 1,8-diiodooctane.

scholarly journals Investigation of PCBM Concentration on the Performance of Small Organic Solar Cell

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Yasser A. M. Ismail ◽  
T. Soga ◽  
T. Jimbo
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Charge Carrier ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Acid Methyl Ester ◽  
Fullerene Derivative ◽  
Performance Parameters ◽  
Carrier Separation

We have fabricated bulk heterojunction organic solar cells using coumarin 6 (C6) as a small organic dye, for light harvesting and electron donating, with fullerene derivative [6,6]-phenyl-C61 butyric acid methyl ester (PCBM), acting as an electron acceptor, by spin-coating technique of the blend solutions. We have studied effect of PCBM concentration on photocurrent and performance parameters of the solar cells. We found that the optical absorption of the dye increased with increasing its concentration in the active layer blends. The higher concentrations of PCBM in active layer enhanced the photocurrent of the solar cells, as a result of improving charge carrier separation and electron transport in solar cell active layer. The improved charge carrier separation between C6, as a donor, and PCBM, as an acceptor, was indicated through the formation of bulk heterojunction by blending C6 with PCBM. The formation of C6:PCBM bulk heterojunction blend was confirmed through the symbatic behavior of the corresponding solar cell and, also, through the homogeneity and smoothing in the atomic force microscopy images of the C6:PCBM blend films. For the same reasons, the performance parameters of the C6:PCBM solar cell improved by modification of the PCBM concentration in the solar cell active layer.

Polymeric Electrolyte Thin Film for Dye Sensitized Solar Cells Application

2019 ◽  
Vol 293 ◽  
pp. 73-81
Author(s):  
Magdalena M. Szindler
Keyword(s):  
Thin Film ◽  
Electrical Conductivity ◽  
Solar Cells ◽  
Solar Cell ◽  
Active Layer ◽  
Potassium Iodide ◽  
Dye Sensitized Solar Cells ◽  
Liquid Electrolyte ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

In this paper, the possibility of replacing liquid electrolyte in a dye sensitized solar cells with a thin film of conductive polymer material was investigated. Liquid electrolyte in the construction of dye sensitized solar cells leaks and evaporates and leads to corrosion of the electrode, which lowers the conversion efficiency of solar radiation to electricity. The research focuses on the appropriate doping of the PVDF-HFP polymer by potassium iodide to improve its electrical conductivity and the development of thin film deposition technology for use in solar cells. Changes in PVDF-HFP surface morphology were researched through increasing of the potassium iodide content measured by scanning electron microscope. The increased content of potassium iodide also led to increased electrical conductivity measured by the Keithley meter. In order to test the suitability of developed materials for application in the construction of photovoltaic cells, a series of dye-sensitized solar cells ITO/TiO2/dye/active layer/Al were prepared. The active layer is made from pure PVDF-HFP and doped with potassium iodide. As a reference solar cell, a standard dye sensitized solar cell with a liquid electrolyte and a counter electrode was also made. Keywords PVDF-HFP; Polyelectrolyte; Dye-sensitized solar cells

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