Restrained energetic disorder for high-efficiency organic solar cells via a solid additive

Abstract

Energetic disorder is one of the major impediments that limit the performance of organic solar cells (OSCs). Nevertheless, achieving a favorable nanoscale morphology that restricts the density of states proves...

Siloxane-induced robust photoactive materials with high humidity tolerance for ambient processing of organic solar cells

“…In the past several years, Y6 and its derivatives as powerful NFAs continuously boosted the PCEs of OSCs to a high level of over 18%. [31][32][33] Unfortunately, obviously decreased PCEs were found for several notable Y-series NFA based active layers when fabricated in air with high RH (Table S2, ESI †). A comprehensive understanding of the mechanism for the damage of the BHJ morphology is very important.…”

Correlation of Broad Absorption Band with Small Singlet‐Triplet Energy Gap in Organic Photovoltaics

“…This is common because of the restricted internal conversion between different excited states that have the same spin multiplicity at reduced temperature. [42] However, further decreasing temperature to 20 K instead leads to a red-shifted PL peak. This abnormal behavior suggests the extremely low temperature could enable random diffusion of excitons through the density of states via energy transfer to a lower-energy state.…”

Suppression of energy disorder by incorporating a small-molecule acceptor into binary all-polymer solar cells

“…10 For instance, by introducing the solid additive 1,3,5-trimethoxybenzene, which exhibits a perfect electrostatic match with the non-fullerene acceptor BTP-eC9, intermolecular packing can be fine-tuned, resulting in suppressed energy disorder and minimized non-radiative recombination losses. 11…”