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

Abstract

Research data are not shared.

Simultaneously Achieving Highly Efficient and Stable Polymer:Non‐Fullerene Solar Cells Enabled By Molecular Structure Optimization and Surface Passivation

“…By replacing the 2‐ethylhexyl with 3‐ethylheptyl on the pyrrole motif of Y6, Yan et al synthesized a new acceptor N3, [ 12 ] which has improved solubility and the consequently PCE in PSC. Very recently, functionalization of Y6 on the β ‐position of the thiophene unit next to the C═C bond was performed and high performance NFA, including Y6‐1O by attaching one alkoxy chain on the Y6, [ 13 ] L8 series, [ 4c ] with which a high PCE of over 18% were reported.…”

A Chlorinated Donor Polymer Achieving High‐Performance Organic Solar Cells with a Wide Range of Polymer Molecular Weight

“…[12][13][14][15][16][17][18][19][20][21] With the help of NFAs, the efficiency of non-fullerene OSCs has been increased to beyond 17%, showing the bright future of this technology. [22][23][24][25][26][27][28][29][30][31][32][33] Compared to the enormous varieties of excellent NFAs now, in the past few years, the development progress of donor polymers is relatively slow. The examples of high-performance donor polymers that can match with NFAs include (poly([2,6′-4,8-di (5ethylhexylthienyl)benzo [ c][1,2,5]thiadiazole)]) (D18).…”

Improving charge transport and reducing non-radiative energy loss via a nonacyclic carbazole-based third component for over 18% efficiency polymer solar cells

“…Versatile NFAs developed in recent years provide plentiful options for the selection of the third component, and many cases have been reported for achieving significantly enhanced performance compared to the host binary systems. 15–22…”

“…Versatile NFAs developed in recent years provide plentiful options for the selection of the third component, and many cases have been reported for achieving signicantly enhanced performance compared to the host binary systems. [15][16][17][18][19][20][21][22] A NFA named BTP-4F (also known as Y6) and a series of its derivatives have been developed since 2019, continuous breakthroughs in the PCE have been made based on these NFAs. 3,[23][24][25] To realize better device performance, ternary strategies have been adopted in host binary blends with BTPseries NFAs.…”

“…3,[23][24][25] To realize better device performance, ternary strategies have been adopted in host binary blends with BTPseries NFAs. [26][27][28][29] Two types of NFAs have been successfully used as the second acceptor: one is BTP-series NFAs with a larger optical bandgap and similar molecular structure which can provide guarantee for the miscibility of the active layer, [17][18][19][20]22 and the other is based on another star molecule ITIC and its derivatives, which have a more complementary absorption spectrum and are benecial to the improvement of the open-circuit voltage (V OC ). 2,15,16,30,31 A series of NFAs based on dithienocyclopentacarbazole (DTC) have been synthesized since 2017, and an optimized PCE of 15.42% was achieved with a chlorinated nonacyclic derivative named DTTC-4Cl.…”