Non-toxic green food additive enables efficient polymer solar cells through adjusting the phase composition distribution and boosting charge transport

Abstract

Solvent additives play an important role in optimizing the morphology of the photoactive layer and improving the photovoltaic performance of polymer solar cells (PSCs).

Elevated Photovoltaic Performance in Medium Bandgap Copolymers Composed of Indacenodi-thieno[3,2-b]thiophene and Benzothiadiazole Subunits by Modulating the π-Bridge

“…Since processing solvent additive with high boiling point was conducive to forming more ordered and nano-scaled bicontinuous interpenetration network structure which can improve the dissociation of light-induced exciton into the free charge carriers at the D/A interface and accelerate the transport of free charge carriers [85,86]. Hence, following that, we selected the 3% DIO (DIO/CB, V/V) as a solvent additive to proceed to optimize the device performance, as illustrated in Figure S12 (in Supplementary Materials).…”

Simple non-fused small-molecule acceptors with bithiazole core: synthesis, crystallinity and photovoltaic properties

“…It indicates that methylation in central bithiazole has little influence on the molecular plane architecture. Both methylated SMAs also have a good planarity and strong intermolecular π-π stacking effect, which is available to facilitate charge transfer[38][39][40][41].However, smaller twist angle is observed in the BTz-4Cl-1 rather than BTz-4F-1 by theoretical calculation. It is suggested that high atomic mass halogens are available to improve the planarity and charge transport properties of conjugated materials through a heavy atom effect[42].…”

Significantly Enhanced Molecular Stacking in Ternary Bulk Heterojunctions Enabled by an Appropriate Side Group on Donor Polymer

“…Polymer solar cells (PSCs) have been emerged as one of the promising technologies for utilizing solar energy due to their advantages of flexibility, light weight, and possible semitransparence. [1][2][3][4][5][6][7][8][9][10][11] Typical bulk heterojunction (BHJ) PSCs, composed of one donor and one acceptor, have demonstrated power conversion efficiency (PCE) over 15% with the rapid development of high-performance donor and nonfullerene acceptor materials. [12][13][14][15][16][17] Although immense progress has been made, the inherent narrow absorption spectra of organic semiconductors makes it hard to harvest a large portion of incident photons in the solar spectrum, which hinders the photocurrent and the improvement of device performance.…”

“…Polymer solar cells (PSCs) have been emerged as one of the promising technologies for utilizing solar energy due to their advantages of flexibility, light weight, and possible semitransparence. [ 1–11 ] Typical bulk heterojunction (BHJ) PSCs, composed of one donor and one acceptor, have demonstrated power conversion efficiency (PCE) over 15% with the rapid development of high‐performance donor and nonfullerene acceptor materials. [ 12–17 ]…”