Charge Recombination in Organic Photovoltaic Devices with High Open-Circuit Voltages

2008 ◽  
Vol 130 (41) ◽  
pp. 13653-13658 ◽  
Author(s):  
Sebastian Westenhoff ◽  
Ian A. Howard ◽  
Justin M. Hodgkiss ◽  
Kiril R. Kirov ◽  
Hugo A. Bronstein ◽  
...  
Keyword(s):  
Charge Recombination ◽  
Open Circuit ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Open Circuit Voltages

Molecular and Morphological Influences on the Open Circuit Voltages of Organic Photovoltaic Devices

2009 ◽  
Vol 131 (26) ◽  
pp. 9281-9286 ◽  
Author(s):  
M. Dolores Perez ◽  
Carsten Borek ◽  
Stephen R. Forrest ◽  
Mark E. Thompson
Keyword(s):  
Open Circuit ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Open Circuit Voltages

Probing Charge Recombination Dynamics in Organic Photovoltaic Devices under Open-Circuit Conditions

2014 ◽  
Vol 4 (15) ◽  
pp. 1400356 ◽  
Author(s):  
Lindsay C. C. Elliott ◽  
James I. Basham ◽  
Kurt P. Pernstich ◽  
Pragya R. Shrestha ◽  
Lee J. Richter ◽  
...  
Keyword(s):  
Charge Recombination ◽  
Open Circuit ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Recombination Dynamics

scholarly journals Diketopyrrolopyrrole Derivatives Functionalized with N-Annulated PDI and Se-Annulated PDI by Direct (Hetero)Arylation Methods

2020 ◽  
Author(s):  
Maryam Nazari ◽  
Gregory Welch ◽  
Thomas A. Welsh
Keyword(s):  
Optical Properties ◽  
Computational Analysis ◽  
Open Circuit ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Steric Strain ◽  
Se Substitution ◽  
Packing Arrangement ◽  
Open Circuit Voltages

<p>We report on the synthesis of diketopyrrolopyrrole (DPP) derivatives functionalized with N-annulated and Se-annulated perylene diimide (NPDI and SePDI, respectively) <i>via </i>direct (hetero)arylation methods. DPP is symmetrically bifunctionalized with SePDI (SePDI–DPP–SePDI) and unsymmetrically functionalized with SePDI and NPDI (SePDI–DPP–NPDI). The effects of Se substitution compared to N substitution on physical, electrochemical, and optical properties are investigated along with performance as non-fullerene acceptors in photovoltaic devices. It is found that Se substitution increases the electron affinity of the p-conjugated molecule and blue shifts the optical absorption spectra, observations that were supported by computational analysis. Steric strain between the PDI endcap and DPP core prevent complete electronic communication along the p-conjugated backbone and results in the unsymmetrical compound, SePDI‒DPP‒NPDI, having electronic and optical properties that are a linear combination of both the symmetrical SePDI and NPDI based compounds. Different is that the SePDI‒DPP‒NPDI compound has a distinct melt observed at 343 °C and organic photovoltaic devices based on this compound had lower than expected open-circuit voltages, suggesting a unique solid-state packing arrangement. SePDI-based compounds performed worse than the NPDI-based compound in organic photovoltaic devices using the donor polymer PTB7-Th. </p>

scholarly journals Diketopyrrolopyrrole Derivatives Functionalized with N-Annulated PDI and Se-Annulated PDI by Direct (Hetero)Arylation Methods

2020 ◽  
Author(s):  
Maryam Nazari ◽  
Gregory Welch ◽  
Thomas A. Welsh
Keyword(s):  
Optical Properties ◽  
Computational Analysis ◽  
Open Circuit ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Steric Strain ◽  
Se Substitution ◽  
Packing Arrangement ◽  
Open Circuit Voltages

<p>We report on the synthesis of diketopyrrolopyrrole (DPP) derivatives functionalized with N-annulated and Se-annulated perylene diimide (NPDI and SePDI, respectively) <i>via </i>direct (hetero)arylation methods. DPP is symmetrically bifunctionalized with SePDI (SePDI–DPP–SePDI) and unsymmetrically functionalized with SePDI and NPDI (SePDI–DPP–NPDI). The effects of Se substitution compared to N substitution on physical, electrochemical, and optical properties are investigated along with performance as non-fullerene acceptors in photovoltaic devices. It is found that Se substitution increases the electron affinity of the p-conjugated molecule and blue shifts the optical absorption spectra, observations that were supported by computational analysis. Steric strain between the PDI endcap and DPP core prevent complete electronic communication along the p-conjugated backbone and results in the unsymmetrical compound, SePDI‒DPP‒NPDI, having electronic and optical properties that are a linear combination of both the symmetrical SePDI and NPDI based compounds. Different is that the SePDI‒DPP‒NPDI compound has a distinct melt observed at 343 °C and organic photovoltaic devices based on this compound had lower than expected open-circuit voltages, suggesting a unique solid-state packing arrangement. SePDI-based compounds performed worse than the NPDI-based compound in organic photovoltaic devices using the donor polymer PTB7-Th. </p>

Carbazole-based small molecules for vacuum-deposited organic photovoltaic devices with open-circuit voltage exceeding 1 V

2017 ◽  
Vol 47 ◽  
pp. 162-173 ◽  
Author(s):  
Yuan Jay Chang ◽  
Jung-Lien Hsu ◽  
Yi-Hua Li ◽  
Sajal Biring ◽  
Tzu-Hung Yeh ◽  
...  
Keyword(s):  
Small Molecules ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices

Effect of Active Layer Thickness on Open Circuit Voltage in Organic Photovoltaic Devices

2009 ◽  
Vol 48 (12) ◽  
pp. 121501 ◽  
Author(s):  
Pankaj Kumar ◽  
Hemant Kumar ◽  
S. C. Jain ◽  
P. Venkatesu ◽  
Suresh Chand ◽  
...  
Keyword(s):  
Layer Thickness ◽  
Active Layer ◽  
Open Circuit Voltage ◽  
Open Circuit ◽  
Organic Photovoltaic ◽  
Active Layer Thickness ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices
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