Modulation of the intramolecular hydrogen bonding and push–pull electron effects toward realizing highly efficient organic room temperature phosphorescence

Abstract

The exploitation of ultralong organic room temperature phosphorescence (UORTP) materials lags far behind the need because of the lack of general design strategies. Here we proposed a facile design strategy...

Achieving Record-Efficiency Organic Solar Cells upon Tuning the Conformation of Solid Additives

“…Usually, the planar conformation is critical to achieve high charge transport mobilities of organic/polymeric semiconductors. Thus, many efforts including covalent and noncovalent methods have been made to tune the conformation to achieve high performance organic/polymeric semiconductors for optoelectronics, such as OSCs, − thin-film transistors (OTFTs), − room temperature phosphorescence, , photodetectors (OPDs), and so on. Among them, noncovalent intramolecular interactions (NIIs) has been used as an important strategy to enhance the molecular rigidity and planarity − and thus the charge transport mobilities of the organic/polymeric semiconductors, since it can efficiently reduce the reorganization energy and suppress nonradiative decay …”

Host to regulate the T1–S1and T1–S0processes of guest excitons in doped systems to control the TADF and RTP emissions

“…The strong conjugated structure is beneficial to improve the absorption and emission capacities, and the electronic property of D-A type is beneficial to reduce the DE ST (band gap between S 1 and T 1 ), which facilitates matching with host energy levels, and the twisted molecular configuration can effectively avoid the p-p quenching of the excitons. [55][56][57] The single crystal structure indicates that the guest molecule does have a distorted steric configuration (Fig. S1, ESI †).…”

Ion−π interactions for constructing organic luminescent materials

“…[ 14–17 ] Tremendous efforts based on the formation of J −aggregates [ 18–19 ] or the introduction of large steric groups and noncovalent interactions (hydrogen bonding, halogen bonding, C−H···π, and ion−π interactions, etc.) [ 20–22 ] have been taken to replace the extensive π−π interactions and thus to circurmvent the luminescence quenching problem. For example, Zhao et al.…”