scholarly journals Organic Solar Cells with Boron- or Nitrogen-Doped Carbon Nanotubes in the P3HT : PCBM Photoactive Layer

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Godfrey Keru ◽  
Patrick G. Ndungu ◽  
Genene T. Mola ◽  
Ana F. Nogueira ◽  
Vincent O. Nyamori
Keyword(s):  
Carbon Nanotubes ◽  
Solar Cells ◽  
Organic Solar Cells ◽  
Acid Methyl Ester ◽  
Charge Carriers ◽  
Spectroscopic Techniques ◽  
Free Charge ◽  
Photoactive Layer ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

Either boron- or nitrogen-doped carbon nanotubes (B- or N-CNTs) were incorporated in bulk heterojunction organic solar cells photoactive layer composed of poly(3-hexylthiophene) (P3HT) : (6,6)-phenyl-C61-butyric acid methyl ester (PCBM). The physical and chemical properties were investigated using different spectroscopic techniques. The cell performance was followed from their current-voltage (J-V) characteristics. Recombination dynamics of the photo-generated free charge carriers were investigated using micro- to milliseconds transient absorption spectroscopy (TAS). Transmission electron microscopy (TEM) images revealed the presence of cone structures and bamboo compartments in B-CNTs and N-CNTs, respectively. X-ray photoelectron spectroscopy (XPS) revealed very little boron was substituted in the carbon network and presence of pyrrolic, pyridinic, and quaternary species of nitrogen in N-CNTs.J-Vcharacteristics were found to be similar for the devices with B- and N-CNTs even though boron- and nitrogen-doped CNTs are known to have different properties, that is, p-type and n-type, respectively. TAS results showed that all devices had long lived free charge carriers but the devices with B- or N-CNTs had low power conservation efficiency and voltage.

The Cost of Converting Excitons into Free Charge Carriers in Organic Solar Cells

2019 ◽  
Vol 11 (1) ◽  
pp. 129-135 ◽  
Author(s):  
Koen Vandewal ◽  
Sigurd Mertens ◽  
Johannes Benduhn ◽  
Quan Liu
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Charge Carriers ◽  
Free Charge ◽  
The Cost

scholarly journals Incorporation of carbon nanotubes in photoactive layer of organic solar cells

2020 ◽  
Author(s):  
Danish Khan ◽  
Zahid Ali ◽  
Danyal Asif ◽  
Manoj Kumar Panjwani ◽  
Idris Khan
Keyword(s):  
Carbon Nanotubes ◽  
Solar Cells ◽  
Organic Solar Cells ◽  
Photoactive Layer

scholarly journals Low-temperature synthesis of carbon nanotubes on indium tin oxide electrodes for organic solar cells

2012 ◽  
Vol 3 ◽  
pp. 524-532 ◽  
Author(s):  
Andrea Capasso ◽  
Luigi Salamandra ◽  
Aldo Di Carlo ◽  
John Marcus Bell ◽  
Nunzio Motta
Keyword(s):  
Carbon Nanotubes ◽  
Solar Cells ◽  
Tin Oxide ◽  
Organic Solar Cells ◽  
Indium Tin Oxide ◽  
Gas Flow ◽  
Acid Methyl Ester ◽  
Hole Transport ◽  
Electrical Performance ◽  
Oxide Electrodes

The electrical performance of indium tin oxide (ITO) coated glass was improved by including a controlled layer of carbon nanotubes directly on top of the ITO film. Multiwall carbon nanotubes (MWCNTs) were synthesized by chemical vapor deposition, using ultrathin Fe layers as catalyst. The process parameters (temperature, gas flow and duration) were carefully refined to obtain the appropriate size and density of MWCNTs with a minimum decrease of the light harvesting in the cell. When used as anodes for organic solar cells based on poly(3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM), the MWCNT-enhanced electrodes are found to improve the charge-carrier extraction from the photoactive blend, thanks to the additional percolation paths provided by the CNTs. The work function of as-modified ITO surfaces was measured by the Kelvin probe method to be 4.95 eV, resulting in an improved matching to the highest occupied molecular orbital level of the P3HT. This is in turn expected to increase the hole transport and collection at the anode, contributing to the significant increase of current density and open-circuit voltage observed in test cells created with such MWCNT-enhanced electrodes.

Nitrogen-doped carbon nanotubes with metal nanoparticles as counter electrode materials for dye-sensitized solar cells

2015 ◽  
Vol 51 (38) ◽  
pp. 8146-8149 ◽  
Author(s):  
Yedi Xing ◽  
Xiaojia Zheng ◽  
Yihui Wu ◽  
Mingrun Li ◽  
Wen-Hua Zhang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Solar Cells ◽  
Electrode Materials ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Counter Electrodes ◽  
Nitrogen Doped ◽  
Dye Sensitized ◽  
Nitrogen Doped Carbon ◽  
Sensitized Solar Cells

Nitrogen-doped carbon nanotubes confining Co and Ni nanoparticles are employed as counter electrodes (CEs) in dye-sensitized solar cells, showing photovoltaic performance comparable to or superior to the devices with sputtered platinum as the CE.

Boron-Nitrogen Doped Dihydroindeno[1,2-b]fluorene Derivatives as Acceptors in Organic Solar Cells

2019 ◽  
Author(s):  
Matthew Morgan ◽  
Maryam Nazari ◽  
Thomas Pickl ◽  
J. Mikko Rautiainen ◽  
Heikki M. Tuononen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Organic Solar Cells ◽  
Organic Solar Cell ◽  
Broad Absorption ◽  
Nitrogen Doped ◽  
Large Depth ◽  
End Products ◽  
Boron Nitrogen ◽  
The Way

The electrophilic borylation of 2,5-diarylpyrazines results in the formation of boron-nitrogen doped dihydroindeno[1,2-<i>b</i>]fluorene which can be synthesized via mildly air-sensitive techniques and the end products handled readily under atmosphereic conditions. Through transmetallation via diarylzinc reagents a series of derivatives were sythesized which show broad absorption profiles that highlight the versatility of this backbone to be used in organic solar cell devices. These compounds can be synthesized in large yields, in alow number of steps and functionalized at many stages along the way providing a large depth of possibilities. Exploratory device paramaters were studied and show PCE of 2%.

Additive-induced Miscibility Regulation and Hierarchical Morphology Enables 17.5% Binary Organic Solar Cells

2021 ◽  
Author(s):  
Jie Lv ◽  
Hua Tang ◽  
Jiaming Huang ◽  
Cenqi Yan ◽  
Kuan Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Organic Solar Cells ◽  
Organic Solar Cell ◽  
Power Conversion ◽  
Charge Trapping ◽  
Free Charge ◽  
Charge Generation ◽  
Low Charge ◽  
Hierarchical Morphology

Due to the barrierless free charge generation, low charge trapping, and high charge mobilities, the PM6:Y6 organic solar cell (OSC) achieves excellent power conversion efficiency (PCE) of 15.7%. However, the...

Sign in / Sign up

Export Citation Format

Share Document