Cover Image

Abstract

The cover image is based on the Review Review: materials and modelling for organic photovoltaic devices by Olivier Doat et al., https://doi.org/10.1002/pi.6280.

Recent advances in small molecular design for high performance non-fullerene organic solar cells

“…Researchers have designed and synthesized a lot of small molecule acceptors [134][135][136] with excellent properties through the strategies of side chain optimization, end group adjustment and center core regulation, together with device optimization achieved PCE higher than 18%. These explorations based on small molecule acceptors not only improved the PCE of polymer donor/small molecule acceptor type OSCs, but also proved the application prospects of small molecule electron acceptors.…”

What We have Learnt from PM6:Y6

“…[22] Several reviews appeared during the last years, some with the main focus on Y6 and its derivative molecules, [23][24][25][26][27][28][29][30][31] others including a wider range of NFA-based blends. [30,[32][33][34][35][36][37][38][39][40][41][42][43][44][45] Whilst these reviews offer valuable insights, they primarily emphasize on optimizing device performance through techniques like blend processing, additives, and interlayer design, there is less discussion regarding the underlying physical processes driving the performance.…”

Spectroelectrochemically determined energy levels of PM6:Y6 blends and their relevance to solar cell performance

“…Within the photoactive layer, bulk-heterojunction solar cells (BHJs) combine an electron donor material (D) and an electron acceptor material (A) to maximize the harvest of the solar spectrum and allow for an efficient charge generation and separation at the D/A-interface. 6,7 To improve the efficiency regarding light absorption and charge generation, both components need to be tuned in terms of energy level matching. Here, a balance between a reduction of the energy loss during charge transfer and a large enough highest occupied molecular orbital offset (DE HOMO ) to drive exciton dissociation needs to be found.…”