scholarly journals Thermal behaviour of dicarboxylic ester bithiophene polymers exhibiting a high open-circuit voltage

2018 ◽  
Vol 6 (14) ◽  
pp. 3731-3742 ◽  
Author(s):  
Ruurd Heuvel ◽  
Fallon J. M. Colberts ◽  
Martijn M. Wienk ◽  
René A. J. Janssen
Keyword(s):  
Solar Cells ◽  
Thermal Properties ◽  
Thermal Behaviour ◽  
Open Circuit Voltage ◽  
Photovoltaic Performance ◽  
Open Circuit ◽  
Side Chains ◽  
Open Circuit Voltages ◽  
Dicarboxylic Ester

Polythiophene derivatives with ester side chains enable high open-circuit voltages in polymer–fullerene solar cells. The side chains affect the solubility, thermal properties, tendency to aggregate, and photovoltaic performance by modulating the morphology of the blends.

scholarly journals Direct AFM-based nanoscale mapping and tomography of open-circuit voltages for photovoltaics

2018 ◽  
Vol 9 ◽  
pp. 1802-1808 ◽  
Author(s):  
Katherine Atamanuk ◽  
Justin Luria ◽  
Bryan D Huey
Keyword(s):  
Solar Cells ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Photovoltaic Performance ◽  
Three Dimensional ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Photovoltaic Properties ◽  
Order Of Magnitude ◽  
Individual Grains

The nanoscale optoelectronic properties of materials can be especially important for polycrystalline photovoltaics including many sensor and solar cell designs. For thin film solar cells such as CdTe, the open-circuit voltage and short-circuit current are especially critical performance indicators, often varying between and even within individual grains. A new method for directly mapping the open-circuit voltage leverages photo-conducting AFM, along with an additional proportional-integral-derivative feedback loop configured to maintain open-circuit conditions while scanning. Alternating with short-circuit current mapping efficiently provides complementary insight into the highly microstructurally sensitive local and ensemble photovoltaic performance. Furthermore, direct open-circuit voltage mapping is compatible with tomographic AFM, which additionally leverages gradual nanoscale milling by the AFM probe essentially for serial sectioning. The two-dimensional and three-dimensional results for CdTe solar cells during in situ illumination reveal local to mesoscale contributions to PV performance based on the order of magnitude variations in photovoltaic properties with distinct grains, at grain boundaries, and for sub-granular planar defects.

Ternary organic solar cells: using molecular donor or acceptor third components to increase open circuit voltage

2019 ◽  
Vol 43 (26) ◽  
pp. 10442-10448 ◽  
Author(s):  
Sergey V. Dayneko ◽  
Arthur D. Hendsbee ◽  
Jonathan R. Cann ◽  
Clément Cabanetos ◽  
Gregory C. Welch
Keyword(s):  
Solar Cells ◽  
Organic Photovoltaics ◽  
Organic Solar Cells ◽  
Open Circuit Voltage ◽  
Power Conversion ◽  
Open Circuit ◽  
Molecular Semiconductors ◽  
Conversion Efficiencies ◽  
Open Circuit Voltages

The addition of donor or acceptor type molecular semiconductors to PBDB-T:PC60BM based organic photovoltaics leads to increases in open circuit-voltages and overall power conversion efficiencies.

scholarly journals Ultra-low p-doping of poly(3-hexylthiophene) and its impact on polymer aggregation and photovoltaic performance

2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Marcel M. Said ◽  
Yadong Zhang ◽  
Raghunath R. Dasari ◽  
Dalaver H. Anjum ◽  
Rahim Munir ◽  
...  
Keyword(s):  
Solar Cells ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Photovoltaic Performance ◽  
Photovoltaic Cells ◽  
Open Circuit ◽  
Device Performance ◽  
Long Range Order ◽  
P3ht Film ◽  
Low Levels

AbstractPoly(3-hexylthiophene) (P3HT) films and P3HT / fullerene photovoltaic cells have been p-doped with very low levels (< 1 wt. %) of molybdenum tris[1-(trifluoromethylcarbonyl)- 2-(trifluoromethyl)-ethane-1,2-dithiolene]. The dopants are inhomogenously distributed within doped P3HT films, both laterally and as a function of depth, and appear to aggregate in some instances. Doping also results in subtle changes in the local and long range order of the P3HT film. These effects likely contribute to the complexity of the observed evolutions in conductivity, mobility and work function with doping levels. They also negatively affect the open-circuit voltage and fill factor of solar cells in unexpected ways, indicating that dopant aggregation and non-uniform distribution can harm device performance.

scholarly journals High open-circuit voltage small-molecule p-DTS(FBTTh2)2:ICBA bulk heterojunction solar cells – morphology, excited-state dynamics, and photovoltaic performance

2015 ◽  
Vol 3 (4) ◽  
pp. 1530-1539 ◽  
Author(s):  
Aung Ko Ko Kyaw ◽  
Dominik Gehrig ◽  
Jie Zhang ◽  
Ye Huang ◽  
Guillermo C. Bazan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Excited State ◽  
Solar Cell ◽  
Small Molecule ◽  
Open Circuit Voltage ◽  
Bulk Heterojunction ◽  
Photovoltaic Performance ◽  
Open Circuit ◽  
Heterojunction Solar Cells ◽  
Bulk Heterojunction Solar Cell

A high VOC of 1V is achieved in the bulk heterojunction solar cell using the solution-processed small molecule donor p-DTS(FBTTh2)2 and indene-C60 bis-adduct acceptor.

Enhanced open circuit voltage of small molecule acceptors containing angular-shaped indacenodithiophene units for P3HT-based organic solar cells

2018 ◽  
Vol 6 (45) ◽  
pp. 12347-12354 ◽  
Author(s):  
Hongyan Huang ◽  
Bo Xiao ◽  
Chengting Huang ◽  
Jing Zhang ◽  
Shuli Liu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Open Circuit Voltage ◽  
Photovoltaic Performance ◽  
Open Circuit ◽  
Geometric Shape ◽  
Charge Mobility ◽  
Film Forming

The effects of the geometric shape of l-IDT and a-IDT subunits on the thermal, optical, electrochemical and film-forming properties, the charge mobility and the photovoltaic performance of the resulting acceptors were investigated.

Incorporating a vertical BDT unit in conjugated polymers for drastically improving the open-circuit voltage of polymer solar cells

2016 ◽  
Vol 40 (6) ◽  
pp. 5300-5305 ◽  
Author(s):  
Shuguang Wen ◽  
Manjun Xiao ◽  
Wenfei Shen ◽  
Chuantao Gu ◽  
Dangqiang Zhu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Conjugated Polymers ◽  
Open Circuit Voltage ◽  
Polymer Solar Cells ◽  
Open Circuit ◽  
Open Circuit Voltages

High open circuit voltages (Vocs) of over 1.0 V were obtained for solar cell devices based on vertical BDT-containing conjugated polymers.

scholarly journals Benzoyl side-chains push the open-circuit voltage of PCDTBT/PCBM solar cells beyond 1 V

2017 ◽  
Vol 49 ◽  
pp. 142-151 ◽  
Author(s):  
Florian Lombeck ◽  
Stefan Müllers ◽  
Hartmut Komber ◽  
S. Matthew Menke ◽  
Andrew J. Pearson ◽  
...  
Keyword(s):  
Solar Cells ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Side Chains

Relating open-circuit voltage losses to the active layer morphology and contact selectivity in organic solar cells

2018 ◽  
Vol 6 (26) ◽  
pp. 12574-12581 ◽  
Author(s):  
Zheng Tang ◽  
Jing Wang ◽  
Armantas Melianas ◽  
Yang Wu ◽  
Renee Kroon ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Active Layer ◽  
Organic Solar Cells ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Charge Transfer State ◽  
Open Circuit Voltages ◽  
Transfer State

By manipulating the active-layer morphologies in OSCs, we achieve different open-circuit-voltages without affecting the energy of charge-transfer state.

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