Non-fullerene small molecule acceptors with three-dimensional thiophene/selenophene-annulated perylene diimides for efficient organic solar cells

Abstract

Three-dimensional non-fullerene acceptors with a spiro core linked with S/Se fused perylene diimides possess appropriate energy levels, twisted molecular configuration and high carrier mobility, leading to a PCE of 6.95% for organic solar cells.

Recent advancements in perylene diimide as an electron acceptor in organic solar cells

“…When paired with the PBDB-T-S electron donor, SCPDT-PDI4-S achieves a PCE of ∼6.95%, which is relatively higher than that of SCPDT-PDI4-Se (PCE ∼4.26%). 70 Three hexapod-shaped PDI hexamers (PSM1, PSM2, and PSM3) are constructed by connecting six PDI units at the bridges of a BPTA core, rather than at the para-positions of a nitrogen atom. This hexapod configuration effectively mitigates the strong aggregation tendencies of the PDIs.…”

Perylene-diimide for organic solar cells: current scenario and prospects in molecular geometric, functionalization, and optoelectronic properties

“…In the mix film, it possesses enhanced carrier mobility and better absorption properties owing to its twisted molecular shape. 291 Because of the more flexible rotation of PDI s, βTPB6 can be rendered with various molecular geometries; consequently, its packing pattern in the solid state can be easily modified as the surrounding environment changes. A greater percentage of the blend film's βTPB6 and PTB7-Th than TPB6-C and PTB7-Th in the blend film is discovered to be edge-on oriented.…”

Morphology evolution via solvent optimization enables all-polymer solar cells with improved efficiency and reduced voltage loss

“…Polymer solar cells (PSCs) have a lot of advantages in terms of molecular structure design, continuous solution processability by using the roll-to-roll technique, and so forth, enabling their great potential for application in renewable energy, portable electronics, and other fields. [1][2][3][4][5][6][7][8][9] Recently, the emergence of nonfullerene acceptors (NFA) significantly promoted the progress in PSCs because of the dramatically improved capability of harvesting solar photons. [10][11][12][13][14][15][16][17][18][19][20] Among so far developed PSCs, all-polymer solar cells (all-PSCs) that consist of an electrondonating conjugated polymer as the donor and an electrondeficient polymer as the acceptor have received a lot of attention because of their excellent stability in the active layer.…”