Toward high-performance organic photovoltaics: the new cooperation of sequential solution-processing and promising non-fullerene acceptors

Abstract

Organic Photovoltaics (OPVs) have long been a hot topic due to their light-weight, low-cost and flexibility. Simple blend-based OPVs have sufficient donor/acceptor (D/A) interfaces and high exciton dissociation efficiency, which...

Low-Cost Silicon Phthalocyanine as a Non-Fullerene Acceptor for Flexible Large Area Organic Photovoltaics

“…The improved performance of Alt− Sq versus BHJ using green solvents could be due to increased exciton dissociation and improved charge transport as a result of the sequentially deposited layers. 47,48 Charge Carrier Mobility. The charge transport properties of the three types of blade-coated active layers (BHJ, Sq, Alt-Sq) were probed using the space-charge-limited current (SCLC) method.…”

“…Although Alt–Sq devices exhibit improved performance over the BHJ counterpart, the maximum FF only reached 0.50, which is comparatively low to the spin-coated BHJ devices fabricated using the o-DCB solvent. The improved performance of Alt–Sq versus BHJ using green solvents could be due to increased exciton dissociation and improved charge transport as a result of the sequentially deposited layers. , …”

“…The improved performance of Alt–Sq versus BHJ using green solvents could be due to increased exciton dissociation and improved charge transport as a result of the sequentially deposited layers. 47 , 48 …”

Challenging PM6-like donor polymers for pairing with a Y-type state-of-the-art acceptor in binary blends for bulk heterojunction solar cells

“…Both J SC and V OC are vital parameters that affect the PCE of OSCs. [19][20][21][22][23][24] Compared with J SC and FF, V OC is the most predictable photovoltaic parameter of polymers when conceiving the molecular structure. For donor-acceptor (D-A) copolymers, the choice of strongly electron-withdrawing A units is the most efficient pathway for tuning the HOMO.…”

Supramolecularly Engineered Bulk‐Heterojunction Solar Cells with Self‐Assembled Non‐Fullerene Nanographene Tetraimide Acceptors

“…[11] In subsequent studies, these afforded solution-and vacuum-processed merocyanine/fullerene BHJ organic solar cells (OSCs) with power conversion efficiencies (PCEs) up to 6.1%. [12,13] In contrast, our efforts to self-assemble perylene bisimide (PBI)-based NFAs into suitable functional light-harvesting and charge-transporting supramolecular structures for photocurrent generation in BHJ solar cells remained so far with limited success. [14,15] However, pioneering research from the groups of Nuckolls, [16] Yan, [17] and Wang [18] showed that the annulation of multiple PBIs units to either central cores or to oligomers afforded NFAs that yield significantly improved polymer-based OSCs with the best performance (11.2% PCE) currently achieved by a quite sophisticated and challenging to synthesize molecule bearing five PBIs annulated to a corannulene central unit reported by Wang and co-workers in 2021.…”