An acceptor with an asymmetric and extended conjugated backbone for high-efficiency organic solar cells with low nonradiative energy loss

Abstract

One of the significant factors that limit efficiencies of organic solar cells (OSCs) is their large energy loss (Eloss), especially the high nonradiative recombination energy loss (ΔEnr). Herein, an acceptor...

Non-covalent interactions (NCIs) in π-conjugated functional materials: advances and perspectives

“…In contrast, the control device PM6:Y6 gives a PCE of 16.45%, V oc = 0.921, with a Δ E nr value of 0.231 eV. 82 In fact, 38 -based devices exhibit the lowest Δ E nr for binary OSCs with PCE > 17%. Binary OSCs fabricated using noncovalently fused-ring electron acceptors ( 39a–c , Chart 5) with S⋯O intramolecular interaction display V oc = 0.79–0.83 V, J sc = 21.91–25.76 mA cm 2 , FF = 60–10–70.78%, and PCE = 11.0–14.53%.…”

Tuning the LUMO levels of non-fullerene acceptorsviaextension of π-conjugated cores for organic solar cells

“…1–5 With the rapid development of NFA materials, the power conversion efficiencies (PCEs) of bulk heterojunction OSCs have increased by 19%. 6–15…”

Selenophene-containing benzodithiophene based donors with different alkyl chains in terminal groups for high-performance all-small-molecule organic solar cells

“…To be precise, the highest performances have mainly been achieved for the polymer based OSCs due to the interpenetrating network and favorable domain sizes in the active layer, as a benefit of the long conjugated backbone and efficient pre-aggregation of the polymer. [15][16][17][18][19][20][21] By contrast, all-small-molecule OSCs (ASM-OSCs) exhibit lower efficiencies than those of their polymer counterparts. [22][23][24][25][26][27][28][29][30] In view of the outstanding advantages of small molecule (SM) materials, such as easy purification, well-defined chemical structures and less batch-to-batch variation, ASM-OSCs have shown great potential for commercialization.…”