Voltage losses in indoor light harvesting organic photovoltaic devices: a case study of green solvent processed PM6/IT-4Cl devices

Abstract

Organic photovoltaic (OPV) devices are a promising technology for indoor light harvesting and power conversion, but high voltage losses, especially under weak illumination, hinder their development. In this work, the...

Enhancing performance of organic photovoltaic and photodetector devices using non-atomically doped ZnO electrodes with superior optical properties

“…Furthermore, the V oc of the NAD-ZnO-based device is superior to that of the ITO-based device. This advantage is likely attributed to the lower leakage current ( J leak ) and higher shunt resistance ( R sh ) of the NAD-ZnO device, 44 as shown in Fig. 5b.…”

Trap suppression in ordered organic photovoltaic heterojunctions

“…In addition to the basic molecular structure design, device engineering also has an important impact on the overall trap state suppression of a device by improving the phase separation and molecular crystallinity in the active layer, based on adjusting the interface interactions and the dynamics of film formation of the donor/acceptor blend. 51 Many methods, such as ternary strategy, 52–61 additive introduction, 62,63 device configuration, 64,65 etc. were employed to enhance molecular order and/or reduce trap states in OSCs.…”

Improving Performance of Organic Photovoltaic Devices under Low Illuminations

“…On the other hand, nonradiative recombination losses (Δ V nr ) could also vary depending on the illumination intensity, as the dominant recombination mechanism for charge carriers in OPV devices could change from bimolecular recombination to trap-assisted or other nonemissive recombination mechansims. , The increase in trap-assisted recombination losses in the OPV device with decreasing illumination intensity leads to an increase in Δ V nr , significantly limiting the performance of OPV devices under low illumination intensities, and this critical issue has not received much attention today. Therefore, to further enhance the V OC and improve the performance of OPV devices under low-illumination conditions, a better understanding regarding the voltage losses, and the recombination mechanisms of charge carriers in the devices under low illumination intensity needs to be gained, and an effective approach to increase V OC needs to be developed.…”