AC characterization of bulk organic solar cell in the dark and under illumination

Vary, Michal; Perny, Milan; Šály, V.; Packa, Juraj

doi:10.1016/j.apsusc.2014.06.021

Cited by 2 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fitting through Nyquist and equivalent circuit models (shown in the inset), the R surface values for PM6:BTP-eC9 and ternary devices were 426 and 271 Ω, respectively. [75][76][77] The smaller surface resistance implied fewer interface defects for devices and may further inhibit charge recombination. [78] Moreover, the series resistance (Rs) of PM6:BTP-eC9 and ternary devices were 16.5 and 13.8 Ω cm 2 , respectively, consistent with the observed improvements in FF and J sc .…”

Section: Resultsmentioning

confidence: 99%

Releasing Acceptor from Donor Matrix to Accelerate Crystallization Kinetics with a Second Donor toward High‐Efficiency Green‐Printable Organic Photovoltaics

Xue

Zhao

et al. 2023

Adv Funct Materials

View full text Add to dashboard Cite

The state‐of‐the‐art power conversion efficiency (PCE) of organic solar cells (OSCs) is typically achieved in the devices fabricated by toxic halogen solvents with complex post‐treatment processes in strictly inert atmosphere. Developing suitable processing method for printing in ambient air using eco‐friendly solvents with continuous solution supply and fabricating efficient devices without any post‐treatment are intensively desired. Controlling the crystallization kinetics to fine‐tune the acceptor's assembly behavior with a second donor for favorable morphological evolution is an effective approach to achieve above requirements. Herein, a kinetics‐controlling strategy is implemented by introducing a strong crystalline small molecule, BTR‐Cl, to enhance the crystallinity of acceptors. The combined in situ spectra characterizations revealed that the earlier aggregation of acceptor and modulation in conformation of PM6 can be achieved. This unique aggregation behavior facilitated enhanced film crystallization with reduced paracrystallinity of π–π stacking, resulting in improved charge transport and inhibited charge recombination. An outstanding PCE of 17.50% is obtained for the device processed with o‐xylene via ambient air printing without any post‐treatment. More significantly, efficient all‐printed inverted devices and large‐area modules are prepared. The generalization of this strategy has been confirmed in other efficient systems, suggesting a great potential for universally fabricating high‐efficiency and eco‐friendly OSCs.

show abstract

Section: Resultsmentioning

confidence: 99%

Releasing Acceptor from Donor Matrix to Accelerate Crystallization Kinetics with a Second Donor toward High‐Efficiency Green‐Printable Organic Photovoltaics

Xue

Zhao

et al. 2023

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…The EIS measurement is an important tool to reveal the degradation changes due to high voltage stress and environmental stress such as temperature. In this method, the impedance characteristics with and without failure and degradation of modules are measured as Nyquist plots to be used as a diagnostic tool for PV modules (Váry, Sály, Packa, Perný, & Schlosser, 2015). The Nyquist plot shows on the complex plane the real part of a Frequency Response Functions (FRF) against its imaginary part with frequency as an implicit variable.…”

Section: Degradation In Pv Modulesmentioning

confidence: 99%

Performance of Photovoltaic Modules After an Accelerated Thermal Cycling Degradation Test

et al. 2019

View full text Add to dashboard Cite

Typically, datasheets of photovoltaic (PV) modules state that the guaranteed power production remains constant for a certain period of time and after this point, a linear reduction begins reaching an estimated 80% of the original rated power. Moreover, literature reports that the degradation of PV modules reaches less than 1% per year. In this regard, after 20 years of operation a typical PV module will deliver approximately 20% less energy than a the beginning of its life. In this article, the results of an accelerated thermal cycling degradation test are compared to its brand new conditions. These results demonstrate that although the performance among the PV modules is variable when new, after the cycling test the performance of the degraded PV modules is similar. In this case, the power reduction of the degraded module varies from 1.4% up o 7.6% when compared to the initial condition. Furthermore, an Electrochemical Impedance Spectroscopy (EIS) analysis demonstrates that at high frequencies the results are practically the same regardless if the panel is new or degraded, but at low frequencies the variation of the impedance is notorious.

show abstract

AC characterization of bulk organic solar cell in the dark and under illumination

Cited by 2 publications

References 11 publications

Releasing Acceptor from Donor Matrix to Accelerate Crystallization Kinetics with a Second Donor toward High‐Efficiency Green‐Printable Organic Photovoltaics

Releasing Acceptor from Donor Matrix to Accelerate Crystallization Kinetics with a Second Donor toward High‐Efficiency Green‐Printable Organic Photovoltaics

Performance of Photovoltaic Modules After an Accelerated Thermal Cycling Degradation Test

Contact Info

Product

Resources

About