Photophysical, electrochemical properties and flexible organic solar cell application of 7,7-bis(1-cyclopropyl carbonyl piperazino)-8,8 dicyanoquinodimethane

Abstract

Tetracyanoquinodimethane (TCNQ), when reacted with primary/secondary/simple aromatic amines, generate mono/di-substituted derivatives, predominantly manifesting optical/non-linear optical properties. Nevertheless, utilization of specific amine plays a critical role in the sequel of material...

Efficient Standalone Flexible Small Molecule Organic Solar Cell Devices: Structure-Performance Relation Among Tetracyanoquinodimethane Derivatives

“…Contrarily, diffusion of counterions becomes the rate-determining step when the peak current is proportional to the square root of the scan rate. 31 , 32 Accordingly, 1 – 4 followed the diffusion-controlled redox process as the cathodic peak current fits better with the square root of the scan rate ( Figure 2 c,d; Figures S6c,d, S8c,d ).…”

“…Generally, the redox process follows two perspectives; i.e., if the scan rate is proportional to the anodic/cathodic peak current, the rate-determining step depicts the electron transfer process. Contrarily, diffusion of counterions becomes the rate-determining step when the peak current is proportional to the square root of the scan rate. , Accordingly, 1 – 4 followed the diffusion-controlled redox process as the cathodic peak current fits better with the square root of the scan rate (Figure c,d; Figures S6c,d, S8c,d).…”

“…The PV devices begin to produce power when they are illuminated, and this power is measured by a source measuring unit . For any given PV cell, the key characterizing factor is the PCE, which is the ratio of the maximum output power ( P out ) generated by the PV device to the total incident power ( P in ) . The fill factor (FF) is characterized as the quotient of the maximum power ( P MAX ) generated by the solar cell and the product of its open circuit voltage ( V oc ) and short circuit current ( J SC ). , The FF serves as an indicator of the ease or difficulty in extracting the photoexcited electron and holes from the PV device. , The PCE for all the fabricated devices along with other essential parameters such as J SC , V oc , and FF are obtained and analyzed in this study.…”

“…Until the forward bias voltage ( V FB ) exceeds the open circuit voltage ( V OC ), there is essentially a small amount of current in the dark. The PV devices begin to produce power when they are illuminated, and this power is measured by a source measuring unit . For any given PV cell, the key characterizing factor is the PCE, which is the ratio of the maximum output power ( P out ) generated by the PV device to the total incident power ( P in ) .…”

“…The PV devices begin to produce power when they are illuminated, and this power is measured by a source measuring unit. 31 For any given PV cell, the key characterizing factor is the PCE, which is the ratio of the maximum output power ( P out ) generated by the PV device to the total incident power ( P in ). 31 The fill factor (FF) is characterized as the quotient of the maximum power ( P MAX ) generated by the solar cell and the product of its open circuit voltage ( V oc ) and short circuit current ( J SC ).…”