Highly efficient layer-by-layer large-scale manufacturing of polymer solar cells with minimized device-to-device variations by employing benzothiadiazole-based solid additives

Abstract

Layer-by-layer (LBL) processing approach is recently under intensive investigation to fabricate efficient polymer solar cells (PSCs) reconsidering its many positive aspects over bulk-heterojunction configuration. Moreover, with recently reported successful solid...

Improving the Stability of Non-fullerene-Based Organic Photovoltaics through Sequential Deposition and Utilization of a Quasi-orthogonal Solvent

“…The difference is due to the different spin-coating method. The best PCE with the PM6 and Y6 was obtained by the dynamic dispense spin-coating method. − We also obtained higher PCE with the spin-coating method (SD­(D) in Table ). Since the method is not a practical due to the limitation of the large area coating, we excluded the SD­(D) device from the stability study.…”

“…While non-fullerene acceptors (NFAs) can improve the PCE of SqD-OPVs, they have low solubility in DCM especially when mixed with aliphatic additives like DIO. Recently, highly efficient SqD-OPVs have been reported using dynamic coatings where the NFA is dissolved in the same solvent as the polymer and deposited on a fast-rotating polymer layer to prevent dissolution out of the polymer. − However, a dynamic coating is not practical for large-area coatings. To develop a SqD process applicable for large-area coating, an NFA solvent that is orthogonal to the polymer layer is needed, and the active layer should be coated using the static coating method.…”

Building-up an interrelationship between isomeric benzyl inner side chains within nonfullerene acceptors and isomeric xylene solvents for non-chlorinated solvent-processed organic solar cells

“…Extensive advances have been achieved through innovations in both device engineering and material design for over 30 years. [1][2][3][4][5][6] In particular, tremendous improvement in the power conversion efficiencies (PCEs) of OSCs has been made by the emergence of nonfullerene acceptors (NFAs), which enable long-wavelength absorption and low energy loss. [7][8][9][10] Y6 is one of the state-of-the-art NFAs rst reported by Zou et al in 2019.…”

A narrow-bandgap photothermal material based on a donor–acceptor structure for the solar–thermal conversion application

“…Attributed to the N atoms with higher electronegativity and CN groups with a lower-energy π-orbital, BBT exhibits strong electron-withdrawing properties. 29–33 Organic conjugated molecule 2TP-BBT with a D–A structure was synthesized with a strong acceptor BBT and dibenzothiophene as the electron donor. With a low HOMO–LUMO energy level gap and strong electron-absorbing ability of the acceptor group, the absorption of the 2TP-BBT solid ranges from 300 to 1400 nm.…”