A New Approach for Probing the Mobility and Lifetime of Photogenerated Charge Carriers in Organic Solar Cells Under Real Operating Conditions

2012 ◽  
Vol 24 (32) ◽  
pp. 4381-4386 ◽  
Author(s):  
A. Baumann ◽  
J. Lorrmann ◽  
D. Rauh ◽  
C. Deibel ◽  
V. Dyakonov
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Operating Conditions ◽  
Charge Carriers ◽  
New Approach

Measuring the competition between bimolecular charge recombination and charge transport in organic solar cells under operating conditions

2018 ◽  
Vol 11 (10) ◽  
pp. 3019-3032 ◽  
Author(s):  
Michael C. Heiber ◽  
Takashi Okubo ◽  
Seo-Jin Ko ◽  
Benjamin R. Luginbuhl ◽  
Niva A. Ran ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Organic Solar Cells ◽  
Fill Factor ◽  
Charge Recombination ◽  
Operating Conditions ◽  
Analysis Technique

A new impedance-photocurrent device analysis technique is developed to elucidate the complex factors that dictate the fill factor in operating devices.

scholarly journals Effects of Delocalized Charge Carriers in Organic Solar Cells: Predicting Nanoscale Device Performance from Morphology

2014 ◽  
Vol 25 (13) ◽  
pp. 1996-2003 ◽  
Author(s):  
Adam G. Gagorik ◽  
Jacob W. Mohin ◽  
Tomasz Kowalewski ◽  
Geoffrey R. Hutchison
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Charge Carriers ◽  
Device Performance ◽  
Nanoscale Device

scholarly journals Charge carrier mobility dynamics in organic semiconductors and solar cells

2020 ◽  
Vol 60 (1) ◽  
Author(s):  
Vidmantas Gulbinas
Keyword(s):  
Solar Cells ◽  
Charge Carrier ◽  
Organic Semiconductors ◽  
Organic Solar Cells ◽  
Carrier Mobility ◽  
Charge Carrier Mobility ◽  
Charge Carriers ◽  
Organic Layer ◽  
Stoichiometric Ratio ◽  
Donor And Acceptor

Charge carrier mobility in organic semiconductors is not a constant value unambigously characterizing some particular material, but depends on the electric field, temperature and even on time after it was generated or injected. The time dependence is particularly important for the thin-film devices where charge carriers pass the organic layer before mobility reaching its stationary value. Here we give a review of experimental techniques with ultrafast timeresolution enabling one to address the mobility kinetics and analyse properties of the time-dependent mobility in conjugated polymers and organic solar cells. We analyse kinetics during the charge carrier generation and extraction of free charge carriers. The mobility typically decreases by several orders of magnitude on a picosecond-nanosecond time scale; however, its kinetics also depends on the investigation technique. The mobility kinetics in blends for bulk heterojunction solar cells strongly depends on the stoichiometric ratio of donor and acceptor materials.

Surface-charge accumulation effects on open-circuit voltage in organic solar cells based on photoinduced impedance analysis

2014 ◽  
Vol 16 (10) ◽  
pp. 4971-4976 ◽  
Author(s):  
Huidong Zang ◽  
Yu-Che Hsiao ◽  
Bin Hu
Keyword(s):  
Solar Cells ◽  
Surface Charge ◽  
Organic Solar Cells ◽  
Open Circuit Voltage ◽  
Impedance Analysis ◽  
Open Circuit ◽  
Charge Carriers ◽  
Charge Accumulation

The accumulation of dissociated charge carriers plays an important role in reducing the loss occurring in organic solar cells.

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.

A new approach for preparation of ternary bulk-heterojunction using dual-feed ultrasonic spray for organic solar cells

2019 ◽  
Vol 91 ◽  
pp. 296-304
Author(s):  
Swapnil Tak ◽  
Hemant Tarkas ◽  
Gauri Bisen ◽  
Sanjay Ghosh ◽  
Jaydeep V. Sali
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
New Approach ◽  
Ultrasonic Spray ◽  
Ternary Bulk Heterojunction

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
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