A chlorinated lactone polymer donor featuring high performance and low cost

Wide-bandgap polymer donors for non-fullerene organic solar cells

“…In the last few years, Ding et al developed a series of lactam, lactone and thiolactone polymer donors, and their photovoltaic performance improved from 10% to 18%. 68–72 Among them, L1 based on a 5 H -dithieno[3,2- b :2′,3′- d ]pyran-5-one unit and BDTT presented the wide bandgap of 1.96 eV and deep HOMO level of −5.45 eV for high V oc . As shown in Table 5, a decent PCE of 16.12% was achieved for the binary L1 :BTP-eC9 cell, and this promising result inspired continuous work for the development of high-performance fused-ring aromatic lactone (FRAL)-based polymer donors.…”

“…These two polymers exhibited enhanced backbone planarity, improved hole mobility, optimized morphology with typical nanofibers, and superior photovoltaic performance of 17.81% or 18.10% for the corresponding ternary polymer:N3:PC 61 BM cells, respectively. 70,72…”

“…These two polymers exhibited enhanced backbone planarity, improved hole mobility, optimized morphology with typical nanobers, and superior photovoltaic performance of 17.81% or 18.10% for the corresponding ternary polymer:N3:PC 61 BM cells, respectively. 70,72 In 2021, Hou et al designed and synthesized P5T-2F based on uorinated quaterthiophene and BDD unit to control its miscibility by tuning its electrostatic interactions. As expected, P5T-2F showed enhanced conformational stability, reduced electrostatic potentials (ESP), and appropriate miscibility, and thus the P5T-2F:eC9 cell afforded a much higher PCE of 17.7% than that of its non-uorinated analogue.…”

“…photovoltaic performance improved from 10% to 18% [68][69][70][71][72]. Among them, L1 based on a 5H-dithieno[3,2-b:2 ′ ,3 ′ -d]pyran-5one unit and BDTT presented the wide bandgap of 1.96 eV and deep HOMO level of −5.45 eV for high V oc .…”

Thiophene–Perylenediimide Bridged Dimeric Porphyrin Donors Based on the Donor–Acceptor–Donor Structure for Organic Photovoltaics

“…Designing photovoltaic materials has been considered as one of the most promising strategies for improving the power conversion efficiencies (PCEs) of organic solar cells (OSCs). − Despite the fact that PCEs have demonstrated over 18% in OSCs with the combination of polymeric donors and nonfullerene acceptors, polymeric donors are still limited with unmanageable molecular weight variations. − Small-molecule (SM) donors, on the other hand, have sparked the interest of researchers due to their well-defined chemical structures, high purity, and excellent batch-to-batch reproducibility. − However, PCEs of SM donors with fullerene or nonfullerene acceptors have attained up to 15%, behind OSCs based on polymeric donors due to their excessive crystallinity, poor phase separation, and morphologies. − As a result, the most efficient SM donors must be developed in order to compete with polymeric donors for OSCs.…”