Achieving 16.68% efficiency ternary as-cast organic solar cells

A Review on Printed Electronics: Fabrication Methods, Inks, Substrates, Applications and Environmental Impacts

“…In addition to these developments, the printed organic cells developed by Liu et al [120] achieved 15% PCE. Very recently, Ma et al [121] built a highly efficient ternary system for as-cast organic solar cells with a 16.68% PCE while organic solar cells developed by Cai et al [122] reached up to 18.66% PCE.…”

High-performance polymer solar cells with efficiency over 18% enabled by asymmetric side chain engineering of non-fullerene acceptors

“…In particular, PSCs with a incorporating conjugated polymer donor and a non-fullerene small-molecule acceptor (NFSMA) as an active layer have achieved significant advances due to continuous innovations in the development of efficient photovoltaic materials [5][6][7] and interface buffer layer materials [8], as well as the optimization of active layer mor-phology [9,10]. Accordingly, the power conversion efficiencies (PCE) have been rapidly boosted [11][12][13][14][15]. Also, non-fullerene solar cells possess higher thermal stability, photochemical stability, and longer device lifetimes than their fullerene-based counterparts [16,17].…”

Side‐Chain Engineering on Y‐Series Acceptors with Chlorinated End Groups Enables High‐Performance Organic Solar Cells

“…[46] Last but not least, the outer side chains can introduce steric hindrance between the rigid fused cores and the end groups, resulting in the so-called "conformational locking effect" to reduce the number of stereoisomers and change the planarity of the molecules, which will in turn affect the molecular packing and change the morphological properties of the active layers. [47][48][49] Previously, our group have devoted a lot of efforts in outer sidechain engineering, [19,46,50,51] among which the asymmetric alkyl-alkoxy substitution strategy has shown great potential for the Y-series acceptors since this modification can maintain the advantages of alkoxy substitution to achieve a higher V OC while preventing over-aggregation caused by the alkoxy groups. As a result, the asymmetric acceptor named Y6-1O (Figure 1)-based ternary devices can achieve an excellent PCE of 17.6%.…”

“…[1][2][3][4][5][6][7][8] During the development of the materials used for OSCs, non-fullerene acceptors (NFAs) play vital roles to push the device efficiencies to a high level. [9][10][11][12][13][14][15][16][17][18][19] Among them, the emerging Y-series acceptors exhibit excellent optoelectronic properties and contribute to excellent photovoltaic performances of over 17%. [20][21][22][23][24][25][26][27][28][29] Therefore, it is important to understand the structureproperty relationships of Y-series acceptors and figure out effective methods to further optimize their chemical structures.…”