Recent advances in rylene diimide polymer acceptors for all-polymer solar cells

A Twisted Bay‐Substituted Quaterrylene Phosphorescing in the NIR Spectral Region

“…We speculate that the steric hindrance at the central bay positions of tetra triflate quaterrylene 1 is the limiting factor. The structure of all intermediates and products were unambiguously identified by HR-MS through the detection of the peak corresponding to the molecular mass (M) and by 1 H-, 13 C-and 19 F-NMR, UV/VIS, and IR spectroscopies (see Section S3). In particular, for core tetra-substituted derivative 1, HR-ESI-MS showed the peak related to the molecular mass ([M + 1] + ) at m/z 1317.1943 (C 60 S12) displays a single peak centered at À73.56 ppm, in agreement with data reported in the literature.…”

“…A facile synthetic route based on an oxidative coupling of perylene precursors in the presence of H 2 O 2 as oxidant has been proposed to prepare soluble derivatives featuring peripheral tert-butyl substituents and sterically hindering, core-anchored triflate groups. This approach allows us to fully characterize the unique quaterrylene derivative 1 by 1 H-, 13 C-NMR, UV/VIS and emission spectroscopies and HR-MS spectrometry. Exceptionally, we found the system phosphorescing in the NIR spectral region at 77 K. Nonlinear optical (NLO) responses of core tetra-substituted quaterrylene 1 were investigated, both in solution and thin film, by the Z-scan technique with 35 ps, 532 nm (VIS) and 1064 (IR) laser excitation.…”

Chlorination strategy on polymer donors toward efficient solar conversions

“…Bulk heterojunction (BHJ) polymer solar cells (PSCs), comprising conjugated polymer as electron donor and fullerene or nonfullrene derivatives as electron acceptor, have been drawing extensive attentions because of their advantages of low cost, large-area solution processability, light weight, mechanical flexibility and the great potential for commercial applications [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] . Especially the nonfullerence polymer solar cells have shown a new direction for photovoltaic study due to the rapid development in PCE [21][22][23][24] .…”

Recent Progress in Molecular Design of Fused Ring Electron Acceptors for Organic Solar Cells

“…In the very first bilayer OSC, Tang used a perylene bisimide (PBI) derivative as NFA with PCE approaching 1% . During the last decades, many NFAs mainly based on rylene bisimides like PBI and naphthalene bisimide (NBI) have been developed . Still, their PCE remains lower than that of OSCs based on FAs, <11% even for high performing OSCs.…”