Efficient ternary organic photovoltaic device with a non-halogenated solvent via synergistic inhibiting charge recombination and regulating morphology

Abstract

Environmentally friendly and efficient organic photovoltaic (OPV) devices played a significantly essential role in commercial applications. Herein, The PM6:TBFCl50-BDD:IT-4F-based ternary device was fabricated by using non-halogen solvent o-xylene (o-XY), and...

Nonradiative Energy Loss Generated by Two Hidden Trade-Offs in Non-Fullerene Organic Solar Cells with the Positive Correlation between JSC and VOC

“…Nevertheless, the V OC is affected by the ratio of the third component in the alloy-like model in ternary organic solar cells (T-OSCs). As an effective strategy to break the trade-off between J SC and V OC , the simultaneous enhancement of both photovoltaic parameters can be achieved. , To date, the PCE of T-OSCs is still limited by the energy loss, and there is no clear explanation for the improvement of device performance and composition-dependent photovoltaic properties. Therefore, the two-sidedness of V el may still exist in T-OSCs.…”

Machine learning assisted identification of the matched energy level of materials for high open circuit voltage in binary organic solar cells

“…In order to obtain a high V oc in binary OSCs, some factors have been investigated, such as energy level matching and energy loss in the donor (D) and acceptor (A), interfacial contact of D and A, morphology regulation, charge transfer state, carrier density and molecular packing behavior in the active layer, temperature and light intensity of the device, [7][8][9][10][11][12] as shown in Fig. 2.…”

Nonfullerene Ternary Organic Photovoltaics with Long-Wavelength Light-Absorption Guest Donor Materials to Improve Photovoltaic Performance

“…Bulk heterojunction organic photovoltaics (OPVs) show great potential due to their lightweight, flexibility, low production cost, roll-to-roll fabrication method, and potentially low cost. − According to the solar spectrum, single-junction binary OPVs (consisting of a donor and an acceptor) should be able to efficient collect long-wave photons efficiently, which has driven great advances in the field of OPVs with nonfullerene small molecules as acceptors (NFAs) and mid-band-gap polymer donors. − The solid additives are an effective strategy for optimizing morphology and improving the power conversion efficiencies (PCEs) of OPV . It is well-known that the relatively narrow absorption windows of polymer donors and NFAs (half absorption peaks less than 150 nm) limit the light absorption of single binary photoactive layers. − However, the incorporation of a third component material (second donor or second acceptor) into the binary film and the absorption defects of the host donor and host acceptor are complemented compared to the solar spectrum. , Therefore, a ternary strategy (using either the second donor or the second acceptor as the third component material) is used to further improve the photovoltaic performance.…”